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- What's New
- Function Overview
- Service Overview
- Getting Started
-
User Guide
- Permissions Management
- Purchasing and Using an EVS Disk
- Attaching an Existing EVS Disk
- Viewing EVS Disk Details
- Changing the EVS Disk Type (OBT)
- Expanding EVS Disk Capacity
- Detaching and Deleting an EVS Disk
- Managing EVS Recycle Bin
-
Managing EVS Snapshots
- EVS Snapshot Overview
-
Using EVS Snapshots
- Creating an EVS Snapshot
- Rolling Back Disk Data from a Snapshot
- Creating a Disk from a Snapshot
- Enabling or Disabling Instant Snapshot Restore (for Snapshots in Commercial Use)
- Checking the EVS Snapshot Storage Usage (for Snapshots in Commercial Use)
- Checking EVS Snapshot Details
- Deleting an EVS Snapshot
- Managing Encrypted EVS Disks
- Managing Shared EVS Disks
- Managing EVS Disk Backups
- Managing EVS Transfers
- Managing EVS Tags
- Managing EVS Quotas
- Cloud Eye Monitoring
- Recording EVS Operations Using CTS
- Best Practices
-
API Reference
- Before You Start
- API Overview
- Calling APIs
- Getting Started
- API Version Query
-
API
-
Disk Management
- Creating EVS Disks
- Updating an EVS Disk
- Querying Details About All EVS Disks
- Querying Details About an EVS Disk
- Expanding Capacity of an EVS Disk
- Deleting an EVS Disk
- Creating EVS Disks (Deprecated)
- Querying EVS Disks (Deprecated)
- Expanding Capacity of an EVS Disk (Deprecated)
- Unsubscribing from Yearly/Monthly EVS Disks
- Querying Details About All EVS Disks (Deprecated)
- Querying Details About an EVS Disk (Deprecated)
- Modifying QoS of an EVS Disk
- Snapshot Management
- Tag Management
- Task Management
-
Disk Management
-
Cinder API
-
Disk Management
- Creating EVS Disks
- Deleting an EVS Disk
- Updating an EVS Disk
- Querying EVS Disk Types
- Querying Details About an EVS Disk Type
- Querying EVS Disks
- Querying Details About an EVS Disk
- Querying Details About All EVS Disks
- Querying Extension APIs
- Expanding Capacity of an EVS Disk
- Setting Bootable Flag for an EVS Disk
- Setting Read-Only Flag for an EVS Disk
- Exporting EVS Disk Data as an Image
- Attaching an EVS Disk (Deprecated)
- Detaching an EVS Disk (Deprecated)
- Reserving an EVS Disk (Deprecated)
- Canceling Reservation of an EVS Disk (Deprecated)
- Snapshot Management
- Quota Management
- Disk Transfer Management
- Disk Metadata Management
- Snapshot Metadata Management
- API Version Query
- AZ Query
-
Disk Management
-
Out-of-Date APIs
- API
-
Cinder API
-
Disk Management
- Querying Details About an EVS Disk (Deprecated)
- Creating EVS Disks
- Querying Details About All EVS Disks
- Deleting an EVS Disk
- Updating an EVS Disk
- Querying EVS Disk Types
- Querying Details About an EVS Disk Type
- Querying EVS Disks
- Querying Details About an EVS Disk
- Querying Extension APIs
- Expanding Capacity of an EVS Disk
- Setting Bootable Flag for an EVS Disk
- Exporting EVS Disk Data as an Image
- Setting Read-Only Flag for an EVS Disk
- Snapshot Management
- Quota Management
- Disk Metadata Management
- Snapshot Metadata Management
- Querying AZs
-
Disk Management
- Permissions and Supported Actions
- Appendix
- Change History
- SDK Reference
-
FAQs
- Summary
-
General
- How Do I Start Using a Newly Purchased Disk?
- Can EVS Disks Be Used Directly for Storage?
- Can EVS Disks Be Used Alone?
- How Can I View My Disk Details?
- How Do I Change the Name of My Disk?
- Can I Change the AZ of My Disk?
- Can I Change the Disk Type, Device Type, or Sharing Attribute of My Disk?
- What Should I Do If an Error Occurs on My EVS Disk?
- How Can I Obtain ECS NIC Information?
- Why Do Some of My EVS Disks Not Have WWN Information?
- How Can I Migrate Data from an EVS Disk?
- What Are the Differences Between System Disks and Data Disks?
- Will I Lose My Disk Data If I Reinstall ECS OS, Change the OS, or Change the ECS Specifications?
- How Can I Export the Original Data After I Changed My Server OS from Windows to CentOS?
- What Are the Differences Between MBR and GPT Partition Styles?
- What Does the "reserveVolume" Trace Mean in CTS?
- How Can I Download My EVS Disk Data to a Local PC?
- How Can I Upload Files to My EVS Disk?
-
Billing
- How Can I Stop Being Billed for My Disk?
- Will I Be Billed If I Have Purchased an EVS Disk But Not Used It?
- How Can I Delete or Unsubscribe from a Yearly/Monthly Disk?
- Can I Recover My Disk Data If the Disk Is Unsubscribed from, Deleted by Mistake, or Released After the Retention Period Ends?
- Will My EVS Disk Be Unsubscribed or Deleted When I Unsubscribe from or Delete Its Server?
- Will I Be Billed for the Disks in the Recycle Bin?
-
Attachment
- Why Can't I View the Attached Data Disk on the Server?
- Why Can't I Attach My Disk to a Server?
- Can I Attach a Disk to Multiple Servers?
- Can I Attach a Disk to a Server in a Different AZ?
- How Can I Add a Data Disk to an Existing Server?
- Can I Attach a Yearly/Monthly Disk to Another Server?
- Can I Attach Different Types of Disks to the Same Server?
- Can I Switch Between System Disks and Data Disks?
- What Should I Do If a Linux EVS Disk Is Attached to a Windows Server?
- Can I Attach an EVS Disk Purchased with a Yearly/Monthly Server to Another Yearly/Monthly Server?
- Can I Change the Function of a System Disk or Data Disk Purchased Along with a Server?
- How Do I Obtain My Disk Device Name in the ECS OS Using the Device Identifier Provided on the Console?
- How Can I View Data on My Disk If Its Yearly/Monthly Server Has Expired?
-
Capacity Expansion
- Can I Reduce or Temporarily Expand the Disk Capacity?
- What Are the Differences Between Expanding Capacity by Expanding an EVS Disk and Creating a New EVS Disk?
- Will My Disk Data Be Lost After I Expand the Disk Capacity?
- Can I Use Backups or Snapshots Created Before Capacity Expansion to Restore Data on Expanded Disks?
- Do I Need to Restart the Server After Expanding the Disk Capacity?
- Do I Need to Detach an EVS Disk Before Expanding Its Capacity?
- What Should I Do If My Disk Capacity Exceeds 2 TiB After Expansion?
- How Can I Allocate Newly Added Space to a New Partition?
- How Can I Allocate Newly Added Space to an Existing Partition?
- Why Did My Disk Capacity Remain Unchanged on the Server After Capacity Expansion?
- Why Can't I Expand Capacity for My Disk?
- How Do I Extend the File System of an Unpartitioned Data Disk in Linux?
- How Do I Extend the Root Partition of a Quickly Provisioned BMS?
- How Do I View the Disk Partition Style in Linux?
- Detachment
- Deletion
-
Capacity
- What Is the Maximum Capacity Supported for the System and Data Disks?
- What Should I Do If My Disk Starts to Run Out of Space?
- How Do I Clean Up My Disk Space on a Windows Server?
- What Can I Do If the Capacity of My Disk Reaches the Maximum But I Still Need More Space?
- What Should I Do If I Use fdisk to Initialize a Disk Larger Than 2 TiB and Then the Space in Excess of 2 TiB Cannot Be Displayed?
- How Can I View My Disk Usage?
- How Can I Monitor My Disk Usages?
- Can I Transfer the Data Disk Capacity to a System Disk?
- Why the Space of My New Disk Is Full After I Uploaded Only 500 MB of Files to the Disk?
-
Snapshot
- What Are the Typical Causes of a Snapshot Creation Failure?
- Does EVS Support Automatic Snapshot Creation?
- Can I Create Snapshots for Multiple Disks at a Time?
- How Is a Snapshot Created for My Disk?
- Why Can't I Roll Back My Disk Data from a Snapshot?
- Can I Roll Back Data from a Snapshot After Reinstalling the OS or Formatting a Disk?
- How Is the Snapshot Size Calculated?
- Do Snapshots Take Space on the Disk?
- Can I Perform Multiple Rollback Operations for a Snapshot?
- Can I Replicate Snapshots to Other Regions or Accounts?
- Why Can't I Find My Snapshot?
- Can I Use a Snapshot to Create a Disk and Roll Back Disk Data at Almost the Same Time?
-
Performance
- How Do I Test My Disk Performance?
- Why Does My Disk Performance Test Using Fio Have Incorrect Results?
- How Can I Handle a Slowdown in Disk Read/Write Speed or Increased I/Os?
- How Can I Improve My Disk Performance?
- Why My Disk's Read IOPS Can't Reach the Theoretical Maximum IOPS When the Disk I/O Usage Is Almost 100%?
- Sharing
- Backup
- Videos
- Glossary
-
More Documents
-
User Guide
- Overview
-
Getting Started
- Basic Operation Procedure
- Create an EVS Disk
- Attach an EVS Disk
-
Initialize an EVS Data Disk
- Introduction to Data Disk Initialization Scenarios and Partition Styles
- Initializing a Windows Data Disk (Windows Server 2008)
- Initializing a Windows Data Disk (Windows Server 2019)
- Initializing a Linux Data Disk (fdisk)
- Initializing a Linux Data Disk (parted)
- Initializing a Windows Data Disk Larger Than 2 TiB (Windows Server 2008)
- Initializing a Windows Data Disk Larger Than 2 TiB (Windows Server 2012)
- Initializing a Linux Data Disk Larger Than 2 TiB (parted)
- Permissions Management
- Disk Capacity Expansion
- Detaching an EVS Disk
- Deleting EVS Disks
- Managing Shared EVS Disks
- Managing EVS Backups
- Managing EVS Snapshots
- Managing EVS Transfers
- Managing a Tag
- Viewing EVS Monitoring Data
- Auditing
-
FAQ
-
General
- How Do I Start Using a Newly Purchased Disk?
- Can EVS Disks Be Used Directly for Storage?
- Can EVS Disks Be Used Alone?
- How Can I View My Disk Details?
- Can I Change the AZ of My Disk?
- What Are the Differences Between System Disks and Data Disks?
- How Can I Download My EVS Disk Data to a Local PC?
- How Can I Export the Original Data After I Changed My Server OS from Windows to CentOS?
- What Are the Differences Between MBR and GPT Partition Styles?
-
Capacity Expansion
- Can I Reduce or Temporarily Expand the Disk Capacity?
- What Are the Differences Between Expanding Capacity by Expanding an EVS Disk and Creating a New EVS Disk?
- Will My Disk Data Be Lost After I Expand the Disk Capacity?
- Do I Need to Restart the Server After Expanding the Disk Capacity?
- Do I Need to Detach an EVS Disk Before Expanding Its Capacity?
- What Should I Do If My Disk Capacity Exceeds 2 TiB After Expansion?
- Why Did My Disk Capacity Remain Unchanged on the Server After Capacity Expansion?
- How Do I Extend the File System of an Unpartitioned Data Disk in Linux?
-
Attachment
- Why Can't I View the Attached Data Disk on the Server?
- Can I Attach a Disk to Multiple Servers?
- Can I Attach a Disk to a Server in Another AZ?
- How Can I Add a Data Disk to an Existing Server?
- Can I Attach Different Types of Disks to the Same Server?
- What Should I Do If a Linux EVS Disk Is Attached to a Windows Server?
- Detachment
- Capacity
- Sharing
-
General
- Appendix
- Change History
-
API Reference (ME-Abu Dhabi Region)
- Before You Start
- API Overview
- Calling APIs
- Getting Started
- API Version Query
- API v2
-
OpenStack Cinder API v2
-
EVS Disk
- Creating EVS Disks
- Deleting an EVS Disk
- Updating an EVS Disk
- Querying EVS Disks
- Querying Details About All Disks
- Querying Details About a Disk
- Querying EVS Disk Types
- Querying Details About an EVS Disk Type
- Querying Details of Tenant Quotas
- Adding Metadata of an EVS Disk
- Querying Metadata of an EVS Disk
- Updating Metadata of an EVS Disk
- Querying One Piece of Metadata for an EVS Disk
- Updating One Piece of Metadata for an EVS Disk
- Deleting One Piece of Metadata for an EVS Disk
- Querying Extension APIs
- Querying All AZs
-
EVS Disk Actions
- Expanding Capacity of an EVS Disk
- Setting Bootable Flag for an EVS Disk
- Setting Read-Only Flag for an EVS Disk
- Exporting EVS Disk Data as an Image
- Attaching an EVS Disk (Deprecated)
- Detaching an EVS Disk (Deprecated)
- Reserving an EVS Disk (Deprecated)
- Canceling Reservation of an EVS Disk (Deprecated)
-
EVS Snapshot
- Creating an EVS Snapshot
- Deleting an EVS Snapshot
- Updating an EVS Snapshot
- Querying EVS Snapshots
- Querying Details About EVS Snapshots
- Querying Details About an EVS Snapshot
- Adding Metadata of an EVS Snapshot
- Querying Metadata of an EVS Snapshot
- Updating One Piece of Metadata for an EVS Snapshot
- Updating Metadata of an EVS Snapshot
- Querying One Piece of Metadata for an EVS Snapshot
- Deleting One Piece of Metadata for an EVS Snapshot
- EVS Disk Transfer
-
EVS Disk
- Out-of-Date APIs
- Appendix
- Change History
-
User Guide (Paris Region)
- Overview
-
Getting Started
- Process Overview
- Create an EVS Disk
- Attach an EVS Disk
-
Initialize an EVS Data Disk
- Introduction to Data Disk Initialization Scenarios and Partition Styles
- Initializing a Windows Data Disk (Windows Server 2008)
- Initializing a Windows Data Disk (Windows Server 2019)
- Initializing a Linux Data Disk (fdisk)
- Initializing a Linux Data Disk (parted)
- Initializing a Windows Data Disk Larger Than 2 TiB (Windows Server 2008)
- Initializing a Windows Data Disk Larger Than 2 TiB (Windows Server 2012)
- Initializing a Linux Data Disk Larger Than 2 TiB (parted)
- Permissions Management
- Creating and Using an EVS Disk
- Disk Capacity Expansion
- Detaching an EVS Disk
- Attaching an Existing Disk
- Deleting EVS Disks
- Viewing EVS Disk Details
- Managing Encrypted EVS Disks
- Managing Shared EVS Disks
- Managing EVS Backups
- Managing a Tag
- Changing EVS Disk Name
- Viewing EVS Monitoring Data
- Viewing EVS Monitoring Data (Agent Installed and Simplified Monitoring Metrics Used)
- Auditing
- Managing Quotas
-
FAQ
- Summary
-
General
- How Do I Start Using a Newly Created Disk?
- Can EVS Disks Be Used Directly for Storage?
- Can EVS Disks Be Used Alone?
- How Can I View My Disk Details?
- Can I Change the AZ of My Disk?
- Can I Change the Disk Type, Device Type, or Sharing Attribute of My Disk?
- What Should I Do If an Error Occurs on My EVS Disk?
- How Can I Obtain ECS NIC Information?
- Why Do Some of My EVS Disks Not Have WWN Information?
- How Can I Migrate Data from an EVS Disk?
- What Are the Differences Between System Disks and Data Disks?
- Will I Lose My Disk Data If I Reinstall ECS OS, Change the OS, or Change the ECS Specifications?
- How Can I Download My EVS Disk Data to a Local PC?
- How Can I Export the Original Data After I Changed My Server OS from Windows to CentOS?
- What Are the Differences Between MBR and GPT Partition Styles?
- What Does the "reserveVolume" Trace Mean in CTS?
- How Can I Upload Files to My EVS Disk?
- Billing
-
Capacity Expansion
- Can I Reduce or Temporarily Expand the Disk Capacity?
- What Are the Differences Between Expanding Capacity by Expanding an EVS Disk and Creating a New EVS Disk?
- Will My Disk Data Be Lost After I Expand the Disk Capacity?
- Can I Use Backups Created Before Capacity Expansion to Restore Data on Expanded Disks?
- Do I Need to Restart the Server After Expanding the Disk Capacity?
- Do I Need to Detach an EVS Disk Before Expanding Its Capacity?
- What Should I Do If My Disk Capacity Exceeds 2 TiB After Expansion?
- How Can I Allocate Newly Added Space to a New Partition?
- How Can I Allocate Newly Added Space to an Existing Partition?
- Why Did My Disk Capacity Remain Unchanged on the Server After Capacity Expansion?
- Why Can't I Expand Capacity for My Disk?
- How Do I Extend the File System of an Unpartitioned Data Disk in Linux?
- How Do I Extend the Root Partition of a Quickly Provisioned BMS?
- How Do I View the Disk Partition Style in Linux?
-
Attachment
- Why Can't I View the Attached Data Disk on the Server?
- Why Can't I Attach My Disk to a Server?
- Can I Attach a Disk to Multiple Servers?
- Can I Attach a Disk to a Server in Another AZ?
- How Can I Add a Data Disk to an Existing Server?
- Can I Attach Different Types of Disks to the Same Server?
- What Should I Do If a Linux EVS Disk Is Attached to a Windows Server?
- Can I Change the Function of a System Disk or Data Disk Created Along with a Server?
- How Do I Obtain My Disk Device Name in the ECS OS Using the Device Identifier Provided on the Console?
- Detachment
- Deletion
-
Capacity
- What Is the Maximum Capacity Supported for the System and Data Disks?
- What Should I Do If My Disk Starts to Run Out of Space?
- What Can I Do If the Capacity of My Disk Reaches the Maximum But I Still Need More Space?
- What Should I Do If I Use fdisk to Initialize a Disk Larger Than 2 TiB and Then the Space in Excess of 2 TiB Cannot Be Displayed?
- How Can I View My Disk Usage?
- How Can I Monitor My Disk Usages?
- Can I Transfer the Data Disk Capacity to a System Disk?
- Why the Space of My New Disk Is Full After I Uploaded Only 500 MB of Files to the Disk?
-
Performance
- How Can I Test My Disk Performance?
- Why Does My Disk Performance Test Using Fio Have Incorrect Results?
- How Can I Handle a Slowdown in Disk Read/Write Speed and Increased I/O?
- How Can I Improve My Disk Performance?
- Why My Disk's Read IOPS Can't Reach the Theoretical Maximum IOPS When the Disk I/O Usage Is Almost 100%?
- Sharing
- Backup
- Appendix
- Change History
-
API Reference (Paris Region)
- Before You Start
- API Overview
- Calling APIs
- Getting Started
-
APIs
- Disk Management
-
Tag Management
- Batch Deleting Tags of a Specified EVS Disk
- Batch Adding Tags for the Specified EVS Disk
- Obtaining All Tags of an EVS Resource Type
- Querying Tags of an EVS Disk
- Querying Details of EVS Disks by Tag
- Deleting the Tag of an EVS Resource by Key
- Querying the Number of EVS Disks by Tag
- Adding or Updating Tags for an EVS Resource (Deprecated)
- Batch Deleting Tags for an EVS Resource (Deprecated)
- Obtaining Tags of a Specified EVS Resource (Deprecated)
- Querying Tags of an EVS Resource by Key (Deprecated)
- Resetting Tags of an EVS Resource (Deprecated)
- Updating Tags of an EVS Resource by Key (Deprecated)
- Querying EVS Resources by Tag (Deprecated)
- Task Management
- EVS Replication Pair (Deprecated)
-
Replication Consistency Group (Deprecated)
- Creating a Replication Consistency Group (Deprecated)
- Deleting a Replication Consistency Group (Deprecated)
- Querying All Replication Consistency Groups (Deprecated)
- Querying Details About a Replication Consistency Group (Deprecated)
- Updating a Replication Consistency Group (Deprecated)
- Performing a Failover for a Replication Consistency Group (Deprecated)
- Synchronizing a Replication Consistency Group (Deprecated)
- Performing a Primary/Secondary Switchover for a Replication Consistency Group (Deprecated)
- Pausing a Replication Consistency Group (Deprecated)
- Reprotecting a Replication Consistency Group (Deprecated)
- Expanding EVS Disks in a Replication Consistency Group (Deprecated)
- EVS Replication Quota (Deprecated)
-
OpenStack Cinder APIs
-
Disk Management
- Creating EVS Disks
- Deleting an EVS Disk
- Updating an EVS Disk
- Querying EVS Disk Types
- Querying EVS Disks
- Querying Details About All Disks
- Querying Details About a Disk
- Querying Details About an EVS Disk Type
- Querying Extension APIs
- Expanding Capacity of an EVS Disk
- Setting Bootable Flag for an EVS Disk
- Setting Read-Only Flag for an EVS Disk
- Exporting EVS Disk Data as an Image
- Attaching an EVS Disk (Deprecated)
- Detaching an EVS Disk (Deprecated)
- Reserving an EVS Disk (Deprecated)
- Canceling Reservation of an EVS Disk (Deprecated)
- Quota Management
- AZ Query
- Disk Metadata Management
- API Version Query
-
Disk Management
-
Out-of-Date APIs
-
OpenStack Cinder API
-
EVS Disk
- Creating EVS Disks
- Deleting an EVS Disk
- Updating an EVS Disk
- Querying EVS Disks
- Querying Details About All Disks
- Querying Details About a Disk
- Querying EVS Disk Types
- Querying Details About an EVS Disk Type
- Querying Details of Tenant Quotas
- Adding Metadata of an EVS Disk
- Querying Metadata of an EVS Disk
- Updating Metadata of an EVS Disk
- Querying One Piece of Metadata for an EVS Disk
- Updating One Piece of Metadata for an EVS Disk
- Deleting One Piece of Metadata for an EVS Disk
- Querying Extension APIs
- Querying All AZs
- Querying Summary Information of EVS Disks
- Querying Details About a Disk (Deprecated)
- EVS Disk Actions
-
EVS Snapshot
- Creating an EVS Snapshot
- Deleting an EVS Snapshot
- Updating an EVS Snapshot
- Querying EVS Snapshots
- Querying Details About EVS Snapshots
- Querying Details About an EVS Snapshot
- Adding Metadata of an EVS Snapshot
- Querying Metadata of an EVS Snapshot
- Updating One Piece of Metadata for an EVS Snapshot
- Updating Metadata of an EVS Snapshot
- Querying One Piece of Metadata for an EVS Snapshot
- Deleting One Piece of Metadata for an EVS Snapshot
- EVS Disk Transfer
-
EVS Disk
-
OpenStack Cinder API
- Appendix
- Change History
-
User Guide (Kuala Lumpur Region)
- Overview
-
Getting Started
- Process Overview
- Create an EVS Disk
- Attach an EVS Disk
-
Initialize an EVS Data Disk
- Introduction to Data Disk Initialization Scenarios and Partition Styles
- Initializing a Windows Data Disk (Windows Server 2008)
- Initializing a Windows Data Disk (Windows Server 2019)
- Initializing a Linux Data Disk (fdisk)
- Initializing a Linux Data Disk (parted)
- Initializing a Windows Data Disk Larger Than 2 TiB (Windows Server 2008)
- Initializing a Windows Data Disk Larger Than 2 TiB (Windows Server 2012)
- Initializing a Linux Data Disk Larger Than 2 TiB (parted)
- Permissions Management
- Creating and Using an EVS Disk
- Disk Capacity Expansion
- Detaching an EVS Disk
- Attaching an Existing Disk
- Deleting EVS Disks
- Viewing EVS Disk Details
- Managing Encrypted EVS Disks
- Managing Shared EVS Disks
- Managing EVS Backups
- Managing EVS Snapshots
- Managing EVS Transfers
- Managing a Tag
- Changing EVS Disk Name
- Viewing EVS Monitoring Data
- Viewing EVS Monitoring Data (Agent Installed and Simplified Monitoring Metrics Used)
- Auditing
- Managing Quotas
-
FAQ
- Summary
-
General
- How Do I Start Using a Newly Created Disk?
- Can EVS Disks Be Used Directly for Storage?
- Can EVS Disks Be Used Alone?
- How Can I View My Disk Details?
- Can I Change the AZ of My Disk?
- Can I Change the Disk Type, Device Type, or Sharing Attribute of My Disk?
- What Should I Do If an Error Occurs on My EVS Disk?
- How Can I Obtain ECS NIC Information?
- Why Do Some of My EVS Disks Not Have WWN Information?
- How Can I Migrate Data from an EVS Disk?
- What Are the Differences Between System Disks and Data Disks?
- How Can I Download My EVS Disk Data to a Local PC?
- How Can I Export the Original Data After I Changed My Server OS from Windows to CentOS?
- What Are the Differences Between MBR and GPT Partition Styles?
- What Does the "reserveVolume" Trace Mean in CTS?
- How Can I Upload Files to My EVS Disk?
-
Capacity Expansion
- Can I Reduce or Temporarily Expand the Disk Capacity?
- What Are the Differences Between Expanding Capacity by Expanding an EVS Disk and Creating a New EVS Disk?
- Will My Disk Data Be Lost After I Expand the Disk Capacity?
- Can I Use Backups or Snapshots Created Before Capacity Expansion to Restore Data on Expanded Disks?
- Do I Need to Restart the Server After Expanding the Disk Capacity?
- Do I Need to Detach an EVS Disk Before Expanding Its Capacity?
- What Should I Do If My Disk Capacity Exceeds 2 TiB After Expansion?
- How Can I Allocate Newly Added Space to a New Partition?
- How Can I Allocate Newly Added Space to an Existing Partition?
- Why Did My Disk Capacity Remain Unchanged on the Server After Capacity Expansion?
- Why Can't I Expand Capacity for My Disk?
- How Do I Extend the File System of an Unpartitioned Data Disk in Linux?
- How Do I Extend the Root Partition of a Quickly Provisioned BMS?
- How Do I View the Disk Partition Style in Linux?
-
Attachment
- Why Can't I View the Attached Data Disk on the Server?
- Why Can't I Attach My Disk to a ?
- Can I Attach a Disk to Multiple Servers?
- Can I Attach a Disk to a Server in Another AZ?
- How Can I Add a Data Disk to an Existing Server?
- Can I Attach Different Types of Disks to the Same Server?
- What Should I Do If a Linux EVS Disk Is Attached to a Windows Server?
- Can I Change the Function of a System Disk or Data Disk Created Along with a Server?
- How Do I Obtain My Disk Device Name in the ECS OS Using the Device Identifier Provided on the Console?
- Detachment
- Deletion
-
Capacity
- What Is the Maximum Capacity Supported for the System and Data Disks?
- What Should I Do If My Disk Starts to Run Out of Space?
- What Can I Do If the Capacity of My Disk Reaches the Maximum But I Still Need More Space?
- What Should I Do If I Use fdisk to Initialize a Disk Larger Than 2 TiB and Then the Space in Excess of 2 TiB Cannot Be Displayed?
- How Can I View My Disk Usage?
- How Can I Monitor My Disk Usages?
- Can I Transfer the Data Disk Capacity to a System Disk?
- Why the Space of My New Disk Is Full After I Uploaded Only 500 MB of Files to the Disk?
- Performance
- Sharing
-
Snapshot
- What Are the Typical Causes of a Snapshot Creation Failure?
- Does EVS Support Automatic Snapshot Creation?
- Can I Create Snapshots for Multiple Disks at a Time?
- How Is a Snapshot Created for My Disk?
- Why Can't I Roll Back My Disk Data from a Snapshot?
- Can I Roll Back the Data from a Snapshot After Reinstalling the OS or Formatting the Disk?
- How Is the Snapshot Size Calculated?
- Do Snapshots Take Space on the Disk?
- Can I Perform Multiple Rollback Operations for a Snapshot?
- Can I Replicate Snapshots to Other Regions or Accounts?
- Why Can't I Find My Snapshot?
- Can I Use a Snapshot to Create a Disk and Roll Back the Snapshot at Almost the Same Time?
- Backup
- Appendix
- Change History
-
API Reference (Kuala Lumpur Region)
- Before You Start
- API Overview
- Calling APIs
- Getting Started
- API Version Query
- APIs
-
OpenStack Cinder APIs
-
EVS Disk
- Creating EVS Disks
- Deleting an EVS Disk
- Updating an EVS Disk
- Querying EVS Disks
- Querying Details About All Disks
- Querying Details About a Disk
- Querying EVS Disk Types
- Querying Details About an EVS Disk Type
- Querying Details of Tenant Quotas
- Adding the Metadata for an EVS Disk
- Querying Metadata of an EVS Disk
- Updating the Metadata of an EVS Disk
- Querying One Piece of Metadata for an EVS Disk
- Updating One Piece of Metadata for an EVS Disk
- Deleting One Piece of Metadata for an EVS Disk
- Querying Extension APIs
- Querying All AZs
-
EVS Disk Actions
- Expanding Capacity of an EVS Disk
- Setting Bootable Flag for an EVS Disk
- Setting Read-Only Flag for an EVS Disk
- Exporting EVS Disk Data as an Image
- Attaching an EVS Disk (Deprecated)
- Detaching an EVS Disk (Deprecated)
- Reserving an EVS Disk (Deprecated)
- Canceling Reservation of an EVS Disk (Deprecated)
-
EVS Snapshot
- Creating an EVS Snapshot
- Deleting an EVS Snapshot
- Updating an EVS Snapshot
- Querying EVS Snapshots
- Querying Details About EVS Snapshots
- Querying Details About an EVS Snapshot
- Adding Metadata of an EVS Snapshot
- Querying Metadata of an EVS Snapshot
- Updating One Piece of Metadata for an EVS Snapshot
- Updating the Metadata of an EVS Snapshot
- Querying One Piece of Metadata for an EVS Snapshot
- Deleting One Piece of Metadata for an EVS Snapshot
- EVS Disk Transfer
-
EVS Disk
- Out-of-Date APIs
- Permissions Policies and Supported Actions
- Appendix
- Change History
-
User Guide (Ankara Region)
- Overview
-
Getting Started
- Process Overview
- Create an EVS Disk
- Attach an EVS Disk
-
Initialize an EVS Data Disk
- Introduction to Data Disk Initialization Scenarios and Partition Styles
- Initializing a Windows Data Disk (Windows Server 2008)
- Initializing a Windows Data Disk (Windows Server 2019)
- Initializing a Linux Data Disk (fdisk)
- Initializing a Linux Data Disk (parted)
- Initializing a Windows Data Disk Larger Than 2 TiB (Windows Server 2008)
- Initializing a Windows Data Disk Larger Than 2 TiB (Windows Server 2012)
- Initializing a Linux Data Disk Larger Than 2 TiB (parted)
- Disk Capacity Expansion
- Detaching an EVS Disk
- Deleting EVS Disks
- Permissions Management
- Managing Shared EVS Disks
- Managing EVS Backups
- Managing EVS Snapshots
- Managing EVS Transfers
- Viewing EVS Monitoring Data
- Managing Quotas
-
FAQ
-
General
- How Do I Start Using a Newly Disk?
- Can EVS Disks Be Used Directly for Storage?
- Can EVS Disks Be Used Alone?
- How Can I View My Disk Details?
- Can I Change the AZ of My Disk?
- What Are the Differences Between System Disks and Data Disks?
- How Can I Download My EVS Disk Data to a Local PC?
- How Can I Export the Original Data After I Changed My Server OS from Windows to CentOS?
- What Are the Differences Between MBR and GPT Partition Styles?
-
Attachment
- Why Can't I View the Attached Data Disk on the Server?
- Can I Attach a Disk to Multiple Servers?
- Can I Attach a Disk to a Server in Another AZ?
- How Can I Add a Data Disk to an Existing Server?
- Can I Attach Different Types of Disks to the Same Server?
- What Should I Do If a Linux EVS Disk Is Attached to a Windows Server?
- How Do I Obtain My Disk Device Name in the ECS OS Using the Device Identifier Provided on the Console?
-
Capacity Expansion
- Can I Reduce or Temporarily Expand the Disk Capacity?
- What Are the Differences Between Expanding Capacity by Expanding an EVS Disk and Creating a New EVS Disk?
- Will My Disk Data Be Lost After I Expand the Disk Capacity?
- Do I Need to Restart the Server After Expanding the Disk Capacity?
- Do I Need to Detach an EVS Disk Before Expanding Its Capacity?
- What Should I Do If My Disk Capacity Exceeds 2 TiB After Expansion?
- Why Did My Disk Capacity Remain Unchanged on the Server After Capacity Expansion?
- How Do I Extend the File System of an Unpartitioned Data Disk in Linux?
- How Do I View the Disk Partition Style in Linux?
- Detachment
-
Capacity
- What Is the Maximum Capacity Supported for the System and Data Disks?
- What Should I Do If My Disk Starts to Run Out of Space?
- What Should I Do If I Use fdisk to Initialize a Disk Larger Than 2 TiB and Then the Space in Excess of 2 TiB Cannot Be Displayed?
- How Can I View My Disk Usage?
- Why the Space of My New Disk Is Full After I Uploaded Only 500 MB of Files to the Disk?
-
Snapshot
- What Are the Typical Causes of a Snapshot Creation Failure?
- Does EVS Support Automatic Snapshot Creation?
- Can I Create Snapshots for Multiple Disks at a Time?
- How Is a Snapshot Created for My Disk?
- Why Can't I Roll Back My Disk Data from a Snapshot?
- Can I Roll Back the Data from a Snapshot After Reinstalling the OS or Formatting the Disk?
- How Is the Snapshot Size Calculated?
- Do Snapshots Take Space on the Disk?
- Can I Perform Multiple Rollback Operations for a Snapshot?
- Can I Replicate Snapshots to Other Regions or Accounts?
- Why Can't I Find My Snapshot?
- Can I Use a Snapshot to Create a Disk and Roll Back the Snapshot at Almost the Same Time?
- Sharing
-
General
- Appendix
- Change History
-
API Reference (Ankara Region)
- Before You Start
- API Overview
- Calling APIs
- Getting Started
- APIs
-
OpenStack Cinder APIs
-
Disk Management
- Creating EVS Disks
- Deleting an EVS Disk
- Updating an EVS Disk
- Querying EVS Disk Types
- Querying EVS Disks
- Querying Details About All Disks
- Querying Details About a Disk
- Querying Details About an EVS Disk Type
- Querying Extension APIs
- Expanding Capacity of an EVS Disk
- Setting Bootable Flag for an EVS Disk
- Setting Read-Only Flag for an EVS Disk
- Exporting EVS Disk Data as an Image
- Attaching an EVS Disk (Deprecated)
- Detaching an EVS Disk (Deprecated)
- Reserving an EVS Disk (Deprecated)
- Canceling Reservation of an EVS Disk (Deprecated)
- Quota Management
- AZ Query
- Disk Transfer Management
- Disk Metadata Management
- API Version Query
-
Disk Management
-
Out-of-Date APIs
- API
-
OpenStack Cinder API
-
EVS Disk
- Creating EVS Disks
- Deleting an EVS Disk
- Updating an EVS Disk
- Querying EVS Disks
- Querying Details About All Disks
- Querying Details About a Disk
- Querying EVS Disk Types
- Querying Details About an EVS Disk Type
- Querying Details of Tenant Quotas
- Adding Metadata of an EVS Disk
- Querying Metadata of an EVS Disk
- Updating Metadata of an EVS Disk
- Querying One Piece of Metadata for an EVS Disk
- Updating One Piece of Metadata for an EVS Disk
- Deleting One Piece of Metadata for an EVS Disk
- Querying Extension APIs
- Querying All AZs
- Querying Summary Information of EVS Disks
- Querying Details About a Disk (Deprecated)
- EVS Disk Actions
-
EVS Snapshot
- Creating an EVS Snapshot
- Deleting an EVS Snapshot
- Updating an EVS Snapshot
- Querying EVS Snapshots
- Querying Details About EVS Snapshots
- Querying Details About an EVS Snapshot
- Adding Metadata of an EVS Snapshot
- Querying Metadata of an EVS Snapshot
- Updating One Piece of Metadata for an EVS Snapshot
- Updating Metadata of an EVS Snapshot
- Querying One Piece of Metadata for an EVS Snapshot
- Deleting One Piece of Metadata for an EVS Snapshot
- EVS Disk Transfer
-
EVS Disk
- Appendix
- Change History
-
User Guide
- General Reference
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Initializing a Linux Data Disk (fdisk)
Scenarios
This section uses CentOS 7.4 64bit to describe how to initialize a data disk attached to a server running Linux and use fdisk to partition the data disk.
The maximum partition size that MBR supports is 2 TiB and that GPT supports is 18 EiB. If the disk size you need to partition is greater than 2 TiB, partition the disk using GPT.
The partitioning tool fdisk is suitable only for MBR partitions, and parted is suitable for both MBR and GPT partitions. For more information, see Introduction to Data Disk Initialization Scenarios and Partition Styles.
The method for initializing a disk varies depending on the OS running on the server. This document is used for reference only. For the detailed operations and differences, see the product documents of the corresponding OS.
Prerequisites
- A data disk has been attached to a server and has not been initialized.
- You have logged in to the server.
- For how to log in to an ECS, see the Elastic Cloud Server User Guide.
- For how to log in to a BMS, see the Bare Metal Server User Guide.
Creating and Mounting a Partition
The following example shows you how a new primary partition can be created on a new data disk that has been attached to a server. The primary partition will be created using fdisk, and MBR will be used. Furthermore, the partition will be formatted using the ext4 file system, mounted on /mnt/sdc, and configured with automatic mounting at system start.
- fdisk -l
Information similar to the following is displayed:
[root@ecs-test-0001 ~]# fdisk -l Disk /dev/vda: 42.9 GB, 42949672960 bytes, 83886080 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: dos Disk identifier: 0x000bcb4e Device Boot Start End Blocks Id System /dev/vda1 * 2048 83886079 41942016 83 Linux Disk /dev/vdb: 107.4 GB, 107374182400 bytes, 209715200 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes
In the command output, the server contains two disks. /dev/vda is the system disk, and /dev/vdb is the new data disk.
- Run the following command to enter fdisk to partition the new data disk:
fdisk New data disk
In this example, run the following command:
fdisk /dev/vdb
Information similar to the following is displayed:[root@ecs-test-0001 ~]# fdisk /dev/vdb Welcome to fdisk (util-linux 2.23.2). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Device does not contain a recognized partition table Building a new DOS disklabel with disk identifier 0x38717fc1. Command (m for help):
- Enter n and press Enter to create a new partition.
Information similar to the following is displayed:
Command (m for help): n Partition type: p primary (0 primary, 0 extended, 4 free) e extended
There are two types of disk partitions:- Choosing p creates a primary partition.
- Choosing e creates an extended partition.
NOTE:
If the MBR partition style is used, a maximum of 4 primary partitions, or 3 primary partitions and 1 extended partition can be created. The extended partition cannot be used directly and must be divided into logical partitions before use.
Disk partitions created using GPT are not categorized.
- In this example, a primary partition is created. Therefore, enter p and press Enter to create a primary partition.
Information similar to the following is displayed:
Select (default p): p Partition number (1-4, default 1):
Partition number indicates the serial number of the primary partition. The value ranges from 1 to 4.
- Enter the serial number of the primary partition and press Enter. Primary partition number 1 is used in this example. One usually starts with partition number 1 when partitioning an empty disk.
Information similar to the following is displayed:
Partition number (1-4, default 1): 1 First sector (2048-209715199, default 2048):
First sector indicates the start sector. The value ranges from 2048 to 209715199, and the default value is 2048.
- Select the default start sector 2048 and press Enter.
The system displays the start and end sectors of the partition's available space. You can customize the value within this range or use the default value. The start sector must be smaller than the partition's end sector.
Information similar to the following is displayed:First sector (2048-209715199, default 2048): Using default value 2048 Last sector, +sectors or +size{K,M,G} (2048-209715199, default 209715199):
Last sector indicates the end sector. The value ranges from 2048 to 209715199, and the default value is 209715199.
- Select the default end sector 209715199 and press Enter.
The system displays the start and end sectors of the partition's available space. You can customize the value within this range or use the default value. The start sector must be smaller than the partition's end sector.
Information similar to the following is displayed:
Last sector, +sectors or +size{K,M,G} (2048-209715199, default 209715199): Using default value 209715199 Partition 1 of type Linux and of size 100 GiB is set Command (m for help):
A primary partition has been created for the new data disk.
- Enter p and press Enter to view details about the new partition.
Information similar to the following is displayed:
Command (m for help): p Disk /dev/vdb: 107.4 GB, 107374182400 bytes, 209715200 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: dos Disk identifier: 0x38717fc1 Device Boot Start End Blocks Id System /dev/vdb1 2048 209715199 104856576 83 Linux Command (m for help):
Details about the /dev/vdb1 partition are displayed.
- Enter w and press Enter to write the changes to the partition table.
Information similar to the following is displayed:
Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks.
The partition is created.
NOTE:
In case that you want to discard the changes made before, you can exit fdisk by entering q.
- Run the following command to synchronize the new partition table to the OS:
partprobe
- Run the following command to set the file system format for the new partition:
mkfs -t File system format /dev/vdb1
In this example, run the following command to set the ext4 file system for the new partition:
mkfs -t ext4 /dev/vdb1
Information similar to the following is displayed:[root@ecs-test-0001 ~]# mkfs -t ext4 /dev/vdb1 mke2fs 1.42.9 (28-Dec-2013) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 6553600 inodes, 26214144 blocks 1310707 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=2174746624 800 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done
The formatting takes a period of time. Observe the system running status and do not exit.
NOTICE:
The partition sizes supported by file systems vary. Therefore, you are advised to choose an appropriate file system based on your service requirements.
- Run the following command to create a mount point:
mkdir Mount point
In this example, run the following command to create the /mnt/sdc mount point:
mkdir /mnt/sdc
NOTE:
The /mnt directory exists on all Linux systems. If the mount point fails to create, it may be that the /mnt directory has been accidentally deleted. Run the mkdir -p /mnt/sdc command to create the mount point.
- Run the following command to mount the new partition on the created mount point:
mount Disk partition Mount point
In this example, run the following command to mount the new partition /dev/vdb1 on /mnt/sdc:
mount /dev/vdb1 /mnt/sdc
- Run the following command to view the mount result:
df -TH
Information similar to the following is displayed:
[root@ecs-test-0001 ~]# df -TH Filesystem Type Size Used Avail Use% Mounted on /dev/vda1 ext4 43G 1.9G 39G 5% / devtmpfs devtmpfs 2.0G 0 2.0G 0% /dev tmpfs tmpfs 2.0G 0 2.0G 0% /dev/shm tmpfs tmpfs 2.0G 9.1M 2.0G 1% /run tmpfs tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup tmpfs tmpfs 398M 0 398M 0% /run/user/0 /dev/vdb1 ext4 106G 63M 101G 1% /mnt/sdc
New partition /dev/vdb1 is mounted on /mnt/sdc.
NOTE:
If the server is restarted, the mounting will become invalid. You can set automatic mounting for partitions at system start by modifying the /etc/fstab file. For details, see Setting Automatic Mounting at System Start.
Setting Automatic Mounting at System Start
Modify the fstab file to set automatic disk mounting at server start. You can also set automatic mounting for the servers containing data. This operation will not affect the existing data.
The following procedure shows how to set automatic disk mounting at server start by using UUIDs to identify disks in the fstab file. You are advised not to use device names to identify disks in the file because a device name may change (for example, from /dev/vdb1 to /dev/vdb2) during the server stop or start, resulting in improper server running after restart.
UUID is the unique character string for disk partitions in a Linux system.
- Run the following command to query the partition UUID:
blkid Disk partition
In this example, run the following command to query the UUID of the /dev/vdb1 partition:
blkid /dev/vdb1
Information similar to the following is displayed:
[root@ecs-test-0001 ~]# blkid /dev/vdb1 /dev/vdb1: UUID="0b3040e2-1367-4abb-841d-ddb0b92693df" TYPE="ext4"
The UUID of the /dev/vdb1 partition is displayed.
- Run the following command to open the fstab file using the vi editor:
vi /etc/fstab
- Press i to enter editing mode.
- Move the cursor to the end of the file and press Enter. Then, add the following information:
UUID=0b3040e2-1367-4abb-841d-ddb0b92693df /mnt/sdc ext4 defaults 0 2
The preceding content is used for reference only. Add the information that is used in the environment. The parameters are described as follows:- The first column indicates the partition UUID obtained in 1.
- The second column indicates the directory on which the partition is mounted. You can query the mount point using the df -TH command.
- The third column indicates the file system format of the partition. You can query the file system format using the df -TH command.
- The fourth column indicates the partition mount option. Normally, this parameter is set to defaults.
- The fifth column indicates the Linux dump backup option.
- 0: Linux dump backup is not used. Normally, dump backup is not used, and you can set this parameter to 0.
- 1: Linux dump backup is used.
- The sixth column indicates the fsck option, that is, whether to use fsck to check the attached disk during startup.
- 0: not use fsck.
- If the mount point is the root partition (/), this parameter must be set to 1.
When this parameter is set to 1 for the root partition, this parameter for other partitions must start with 2 because the system checks the partitions in the ascending order of the values.
- Press Esc, enter :wq, and press Enter.
The system saves the configurations and exits the vi editor.
- Perform the following operations to verify the automatic mounting function:
- Run the following command to unmount the partition:
In this example, run the following command:
umount /dev/vdb1
- Run the following command to reload all the content in the /etc/fstab file:
mount -a
- Run the following command to query the file system mounting information:
In this example, run the following command:
mount | grep /mnt/sdc
If information similar to the following is displayed, automatic mounting has been configured:
root@ecs-test-0001 ~]# mount | grep /mnt/sdc /dev/vdb1 on /mnt/sdc type ext4 (rw,relatime,data=ordered)
- Run the following command to unmount the partition:
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