- 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Out-of-Date APIs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
Copied.
Initializing a Linux Data Disk (Less Than or Equal to 2 TiB)
Scenarios
This section describes how to initialize a Linux data disk manually. The operations may vary depending on the server OS. Perform initialization operations based on your server OS.
OS |
Partition Style |
File System Format |
Partitioning Tool |
Example Configuration |
---|---|---|---|---|
Not limited |
|
ext* (such as ext2, ext3, and ext4), xfs, and btrfs |
|
|
Prerequisites
You have attached the disk to a server.
Notes and Constraints
- A disk created from a data source does not need to be initialized. Such a disk contains the source data in the beginning. Initializing the disk may clear the initial data on it. If you need to re-initialize the disk, you are advised to back up the disk data first.
- Initializing a disk does not delete the snapshots created for the disk, so you can still use snapshots to roll back data to the source disk after the disk is initialized.
Procedure
Initializing a Data Disk Manually
MBR supports a maximum of four primary partitions or a maximum of three primary partitions plus one extended partition. Multiple logical partitions can be created in the extended partition.
For example, if you want to create four partitions, you have the following options:
- Create four primary partitions.
- Create one primary partition and one extended partition (three logical partitions).
- Create two primary partitions and one extended partition (two logical partitions).
- Create three primary partitions and one extended partition (one logical partition).
The following example shows you how to use fdisk to create two primary MBR partitions (/dev/vdb1: 40 GiB; /dev/vdb2: 60 GiB) on the /dev/vdb data disk.
- Log in to the server.
For how to log in to an ECS, see Logging In to an ECS.
For how to log in to a BMS, see Logging In to a BMS.
- Create two primary partitions, /dev/vdb1 and /dev/vdb2 for data disk /dev/vdb.
- Check that the capacity of the /dev/vdb data disk is 100 GiB.
lsblk
[root@ecs-centos76 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT vda 253:0 0 40G 0 disk ├vda1 253:1 0 1G 0 part /boot └vda2 253:2 0 39G 0 part / vdb 253:16 0 100G 0 disk
- Create the first primary partition /dev/vdb1.
fdisk /dev/vdb
n
p
1NOTE:- Entering p for Partition type creates a primary partition, and entering e creates an extended partition.
- Value 1 is the primary partition number.
[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): n Partition type: p primary (0 primary, 0 extended, 4 free) e extended Select (default p): p Partition number (1-4, default 1): 1
Set First sector to 2048 and Last sector to 83886079 for partition /dev/vdb1 (40 GiB).
First sector (2048-209715199, default 2048): 2048 Last sector, +sectors or +size{K,M,G} (2048-209715199, default 209715199):83886079 Partition 1 of type Linux and of size 40 GB is set
- Create the second primary partition /dev/vdb2.
n
p
2
Command (m for help): n Partition type: p primary (0 primary, 0 extended, 4 free) e extended Select (default p): p Partition number (1-4, default 2): 2
Set the First sector to 83886080 and Last sector to 209715199 for partition /dev/vdb2.
First sector (83886080-209715199, default 83886080): 83886080 Last sector, +sectors or +size{K,M,G} (83886080-209715199, default 209715199):209715199 Partition 2 of type Linux and of size 60 GB is set
NOTE:First and last sectors of the partitions in this example are calculated as follows:
Sector value = Capacity/512 bytes, 1 GiB = 1073741824 bytes
- First sector (2048-209715199, default 2048) shows the sector value range of the /dev/vdb data disk (100 GiB).
First sector = 2048
Last sector = Sector value – 1 = (100 x 1073741824/512) – 1 = 209715200 – 1=209715199
- For the first partition /dev/vdb1 (40 GiB) of the /dev/vdb data disk:
First sector = 2048 (The start sector of the /dev/vdb data disk is used.)
Last sector = Sector value – 1 = (40 x 1073741824/512) – 1 = 83886079
- For the second partition /dev/vdb2 (60 GiB) of the /dev/vdb data disk:
First sector = Last sector of /dev/vdb1 + 1 = 83886079 + 1 = 83886080
Last sector = First sector + Sector value – 1 = 83886080 + (60 x 1073741824/512) – 1 = 209715199
- First sector (2048-209715199, default 2048) shows the sector value range of the /dev/vdb data disk (100 GiB).
- Check that the capacity of the /dev/vdb data disk is 100 GiB.
- Check the sizes and partition styles of the new partitions.
- Check whether the partitioning is successful.
p
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: 0x994727e5 Device Boot Start End Blocks Id System /dev/vdb1 2048 83886079 41942016 83 Linux /dev/vdb2 83886080 209715199 62914560 83 Linux Command (m for help):
NOTE:In case that you want to discard the changes made before, you can exit fdisk by entering q and press Enter. Then, re-create the partitions by referring to step 1.
- Write the changes to the partition table and synchronize the new partition table to the OS.
partprobe
NOTE:If error message -bash: partprobe: command not found is returned, the system cannot identify the command. In this case, run yum install -y parted to install the command. Then run the command again.
- Confirm that the partition style is MBR.
pNOTE:
If Partition Table: msdos is returned, the partition style is MBR.
[root@ecs-test-0001 ~]# parted /dev/vdb GNU Parted 3.1 Using /dev/vdb Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) p Model: Virtio Block Device (virtblk) Disk /dev/vdb: 107GB Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags 1 1049kB 42.9GB 42.9GB primary 2 42.9GB 107GB 64.4GB primary (parted) q [root@ecs-test-0001 ~]#
Enter q and press Enter to exit parted.
- Check whether the partitioning is successful.
- Create ext4 file systems for partitions /dev/vdb1 (40 GiB) and /dev/vdb2 (60 GiB).
mkfs -t ext4 /dev/vdb1
mkfs -t ext4 /dev/vdb2
NOTE:It takes some time to create file systems. Do not exit before the system returns the following information:
[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 2621440 inodes, 10485504 blocks 524275 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=2157969408 320 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 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done
Check whether the file system format is ext4.
parted /dev/vdb
p
[root@ecs-test-0001 ~]# parted /dev/vdb GNU Parted 3.1 Using /dev/vdb Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) p Model: Virtio Block Device (virtblk) Disk /dev/vdb: 107GB Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags 1 1049kB 42.9GB 42.9GB primary ext4 2 42.9GB 107GB 64.4GB primary ext4 (parted) q [root@ecs-test-0001 ~]#
Enter q and press Enter to exit parted.
- Create directories (mount points) and mount the new partitions on the created mount points.
mkdir -p /mnt/sdc
mkdir -p /mnt/sdd
mount /dev/vdb1 /mnt/sdc
mount /dev/vdb2 /mnt/sdd
lsblk
View the mount results.
[root@ecs-test-0001 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT vda 253:0 0 40G 0 disk ├vda1 253:1 0 40G 0 part / vdb 253:16 0 100G 0 disk ├vdb1 253:17 0 40G 0 part /mnt/sdc ├vdb2 253:18 0 60G 0 part /mnt/sdd
You should now see that partitions /dev/vdb1 and /dev/vdb2 are mounted on /mnt/sdc and /mnt/sdd.
- Use the partition UUIDs to configure auto mount at startup.
NOTE:
- Mounts become invalid after a system reboot. You can configure auto mount at startup by adding information of the new partition into the /etc/fstab file.
- You are advised not to use device names to identify disks in the /etc/fstab file because device names are assigned dynamically and may change (for example, from /dev/vdb1 to /dev/vdb2) after a stop or start. This can even prevent your server from booting up.
- UUIDs are the unique character strings for identifying partitions in Linux.
- This operation will not affect the existing data on the ECS.
- Query the partition UUIDs.
blkid /dev/vdb2
[root@ecs-test-0001 ~]# blkid /dev/vdb1 /dev/vdb1: UUID="0b3040e2-1367-4abb-841d-ddb0b92693df" TYPE="ext4" /dev/vdb2: UUID="0d6769k2-1745-9dsf-453d-hgd0b34267dj" TYPE="ext4"
The UUIDs of partitions /dev/vdb1 and /dev/vdb2 are 0b3040e2-1367-4abb-841d-ddb0b92693df and 0d6769k2-1745-9dsf-453d-hgd0b34267dj.
- Configure auto mount at startup.
Press i to enter the editing mode, move the cursor to the end of the file, press Enter, and add the following content:
UUID=0b3040e2-1367-4abb-841d-ddb0b92693df /mnt/sdc ext4 defaults 0 2 UUID=0d6769k2-1745-9dsf-453d-hgd0b34267dj /mnt/sdd ext4 defaults 0 2
Press Esc, enter :wq, and press Enter to save the settings and exit the vi editor.
Table 2 Parameter description Example Value
Description
UUID=0b3040e2-1367-4abb-841d-ddb0b92693df
The UUID of the partition.
/mnt/sdc
The mount point of the partition.
ext4
The file system format of the partition.
defaults
The partition mount option. Normally, this parameter is set to defaults.
0
- The Linux dump backup option.
- 0: Linux dump backup is not used. Usually, dump backup is not used, and you can set this parameter to 0.
- 1: Linux dump backup is used.
2
- The fsck option, which means whether to use fsck to check the disk during startup.
- 2: The check starts from the partitions whose mount points are non-root directories. / is the root directory.
- 1: The check starts from the partitions whose mount points are root directories.
- 0: The fsck option is not used.
- The Linux dump backup option.
- Verify that auto mount takes effect.
umount /dev/vdb1
umount /dev/vdb2
mount -a
The system reloads all the content in the /etc/fstab file.
Query file system mounting information.
mount | grep /mnt/sdc
mount | grep /mnt/sdd
If information similar to the following is displayed, auto mount has taken effect:
root@ecs-test-0001 ~]# mount | grep /mnt/sdc /dev/vdb1 on /mnt/sdc type ext4 (rw,relatime,data=ordered) root@ecs-test-0001 ~]# mount | grep /mnt/sdd /dev/vdb2 on /mnt/sdd type ext4 (rw,relatime,data=ordered)
Feedback
Was this page helpful?
Provide feedbackThank you very much for your feedback. We will continue working to improve the documentation.See the reply and handling status in My Cloud VOC.
For any further questions, feel free to contact us through the chatbot.
Chatbot