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- What's New
- Function Overview
- Service Overview
- Billing
- Getting Started
-
User Guide
- Common Operations
- Instance
- Image
-
Disk
- Disk Types
- Attaching Data Disks
-
Initializing Data Disks
- Introduction to Data Disk Initialization Scenarios and Partition Styles
- Initializing a Windows Data Disk (Windows Server 2016)
- Initializing a Linux Data Disk (fdisk)
- Initializing a Linux Data Disk (parted)
- Initializing a Windows Data Disk Greater Than 2 TB (Windows Server 2012)
- Initializing a Linux Data Disk Greater Than 2 TB (parted)
- Detaching a Disk
- Expanding Disk Capacity
- Key Pair and Password
-
Network
- EIP
- VPC
- High-Speed Network
-
Enhanced High-Speed Network
- Overview
- Adding an Enhanced High-Speed NIC
- Deleting an Enhanced High-Speed NIC
- Configuring an Enhanced High-Speed NIC (SUSE Linux Enterprise Server 12)
- Configuring an Enhanced High-Speed NIC (SUSE Linux Enterprise Server 11)
- Configuring an Enhanced High-Speed NIC (Red Hat, CentOS, Oracle Linux, and EulerOS)
- Configuring an Enhanced High-Speed NIC (Ubuntu)
- Configuring an Enhanced High-Speed NIC (Windows Server)
-
User-defined VLAN
- Overview
- Configuring a User-defined VLAN (SUSE Linux Enterprise Server 12)
- Configuring a User-defined VLAN (SUSE Linux Enterprise Server 11)
- Configuring a User-defined VLAN (Red Hat, CentOS, Oracle Linux, and EulerOS)
- Configuring a User-defined VLAN (Ubuntu)
- Configuring a User-defined VLAN (Windows Server)
- IB Network
- Security
- Permissions Management
- Resources and Tags
- Server Monitoring
- Best Practices
-
API Reference
- Before You Start
- API Overview
- Calling APIs
- BMS APIs
- Examples
- Public Parameters
- Permissions and Supported Actions
-
Historical APIs
- API Instructions (OpenStack Nova APIs)
- API Version Query (OpenStack Nova APIs)
- BMS Lifecycle Management (OpenStack Nova APIs)
- BMS Status Management (OpenStack Nova APIs)
- BMS Metadata Management (OpenStack Nova APIs)
- BMS IP Address Query (OpenStack Nova APIs)
- BMS Flavor Query (OpenStack Nova APIs)
- BMS NIC Management (OpenStack Nova APIs)
- BMS Disk Management (OpenStack Nova APIs)
- BMS 1D Tag Management (OpenStack Nova APIs)
- Appendix
- Change History
- SDK Reference
-
Private Image Creation Guide
- Overview
- Preparing the Environment
-
Linux
- Software
- Tools
- Creating a Linux VM
- Installing a Linux OS on the VM
- Modifying the Boot File (UEFI Boot Mode)
-
Configuring the VM Environment
- Overview
- (Optional) Installing Basic Components
- Configuring the Network
- Configuring systemd Timeout Parameters
- Disabling the Firewall
- (Optional) Upgrading Wicked Components
- (Optional) Disabling NetworkManager
- (Optional) Deleting the Network Management Tool Plug-in
- (Optional) Deleting the Local User
- (Optional) Modifying DHCP Configuration Items
- (Optional) Configuring the GRUB Timeout
- Setting the Maximum Number of Handles to 65535.
- Upload Required Software Packages
- Installing Cloud-Init
- Configuring Cloud-Init
- Checking the Cloud-Init Status
- Modifying the Hardware Device Drivers That Boot the OS
- Installing bms-network-config
- Installing the Network Service
- Installing the SDI Driver
- Installing the Hi1822 Driver
- (Optional) Installing the IB driver
- Installing FusionServer/TaiShanServer iDrivers
- (Optional) Installing the Multipath Software
- Installing the One-Click Password Reset Plug-in
-
Performing Security Configuration
- Modifying SSH Configuration Items
- (Optional) Modifying the Network Script Permission
- (Optional) Modifying the /etc/motd Configuration Item
- Modifying Historical Record Configuration Items
- Optimizing the udev Configuration
- Optimizing SELinux
- Uninstalling denyhosts
- (Optional) Setting Automatic Hostname Update
- (Optional) Installing Common O&M Tools
- (Optional) Setting the Password Validity Period
-
Configuring Remote Login to a BMS
- x86: Oracle Linux 7.3/Oracle Linux 7.4/Red Hat 7/CentOS 7.2/CentOS 7.4/CentOS 7.5/CentOS 7.6
- x86: Oracle Linux 6 series/Red Hat 6 series/CentOS 6
- x86: SUSE 11 SP4
- ARM: CentOS 7
- x86: SUSE 12/SUSE 15/CentOS 7.3/EulerOS/OpenEuler/Oracle Linux 7.2
- ARM: EulerOS/OpenEuler
- x86: Ubuntu 16.04/Ubuntu 18.04
- Arm: Ubuntu 16.04/Ubuntu 18.04
- x86: Ubuntu 14.04/Debian
- Configuring the Root Partition to Be Automatically Extended
- Installing and Upgrading Drivers and Firmware for Ascend BMSs
- Deleting Files
-
Windows
- Preparing Hardware and Software
- (Optional) Installing x86 V5 Server Drivers
- Using Dism++ to Install the VMTools Driver for an ISO File
- Generating a New ISO File
- Creating a Windows VM
- Configuring the VM Environment
- Installing Cloudbase-Init
- (Optional) Installing bms-network-config
- (Optional) Installing the SDI Driver
- (Optional) Installing One-Click Password Reset Plug-in
- Setting the Windows Time Zone
- Setting the Windows Virtual Memory
- (Optional) Configuring Automatic Windows Update
- Configuring the SID
- Stopping the VM and Obtaining the Image
- Converting the Image Format
-
FAQ
- What Can I Do If Packets from the VLAN Subinterface of bond0 of a Linux BMS Use the MAC Address of bond0 as the Source MAC Address?
- What Can I Do If IP Links Are Disconnected Due to the Incorrect Bond Port Mode Configured by the Wicked Module of SUSE 12 SP1?
- How Do I Set the BMS CPU Frequency Governor?
- What Do I Do If Cloudbase-Init Is Stopped on a Provisioned Windows BMS?
- What Can I Do If Data Cannot Be Injected into BMSs Due to cloud-init-local Failures?
- How Do I Activate a Windows BMS?
- How Do I Improve the UDP Packet Performance for x86 EulerOS 2.3?
- How Do I Verify Software Package Integrity?
- How Do I Check Whether a Physical Server Is Running Properly?
- Appendix
- Change History
-
FAQs
-
General FAQ
- What Restrictions Are There on BMS Use?
- How Are BMSs Different from ECSs?
- What Are the Differences Between BMSs and Traditional Physical Servers?
- What Are the Differences Between BMS and Dedicated Host (DeH)?
- How Do BMSs Ensure Data Security?
- Can I Use APIs to Access BMSs?
- What OS Images Does BMS Support?
- Will Services Be Affected If Hyper-Threading Is Configured for BMS?
- How Do I View and Increase the BMS Quota?
- How Do I Synchronize the Time of a BMS?
-
Instance FAQ
- How Long Does It Take to Create a BMS?
- What Do I Do If I Can't Find My BMS on the Management Console?
- How Can I Obtain board_type of a BMS Flavor?
- Why Is the BMS Creation Task Displayed as Failed But the BMS List Shows the BMS?
- How Do I Create a BMS That Can be Quickly Provisioned?
- What Are the Advanced Features of BMSs Using EVS Disks?
- Can I Transfer a BMS to Another Account?
- Is the BMS Host Name with Suffix novalocal Normal?
- Why Does the System Display a Message Indicating That the BMS Cannot Be Deleted?
- How Do I Monitor BMS Metrics?
- How Do I Create an Agency for Server Monitoring of the BMS?
-
Billing FAQ
- Where Can I Query the BMS Price?
- What Are Pre-payment and Post-payment? How Do I Choose Between Them?
- What Is the Impact on Billing if I Unsubscribe from a BMS?
- How Do I Set Automatic Renewal for BMSs Billed on a Yearly/Monthly Basis?
- When Will a BMS Be Released After It Expires?
- How Do I Unfreeze a BMS?
- Key Pair and Password FAQ
-
Login FAQ
- How Do I Prepare to Log In to a BMS?
- What Can I Do If I Selected the Key Pair Authentication When I Created a BMS But Want to Log In to the BMS Using a Password?
- What Do I Do If I Can't Log In to a Windows BMS?
- What Do I Do If I Can't Log In to a Linux BMS?
- What Browser Versions Can Be Used to Remotely Log In to a BMS?
- What Do I Do If the Login Page Does Not Respond?
- What Do I Do If the BMS Console Is Displayed Improperly After I Remotely Log In to a BMS?
- What Do I Do If the Numeric Keypad Does Not Work During Remote Login?
- What Do I Do If the SSH Login or Data Transmission Is Slow?
-
Network and Security FAQ
- Can BMSs of Different Accounts Communicate with Each Other over an Internal Network?
- How Do Two BMSs in the Same Region But in Different AZs Communicate with Each Other?
- Are My BMSs in the Same Subnet?
- Can I Associate a BMS with Multiple Security Groups?
- Can BMSs Communicate with ECSs in the Same VPC?
- What Are the Differences Between the Primary and Extension NICs of BMSs?
- Can I Bind Multiple EIPs to a BMS?
- Can I Configure an EIP?
- Will I Obtain an EIP That Has Been Released?
- What Are the Differences Between EIPs, Private IP Addresses, and Virtual IP Addresses?
- How Can I Modify the Network Configuration or Restart the Network If I Can Log In to a BMS Using Only SSH?
- How Do I Handle the Failure to Ping a CentOS 7 Extension NIC?
- What Do I Do If a Service Port Is Used by a One-Click Password Reset Plug-in?
- What Do I Do If the Communication Between the Primary NIC and Extension NIC of the BMS is Abnormal?
- How Can I Configure a Static IP Address for a BMS?
- What Do I Do If the Network Performance Is Poor When 128 Ethernet Network Devices Are Bound to a BMS?
-
Disk FAQ
- Can EVS Disks Be Attached to BMSs? How Many Data Disks Can Be Attached to a BMS?
- What Are the Restrictions for Attaching a Disk to a BMS?
- How Do I Know Whether EVS Disks Are Available in a Flavor?
- How Do I Change the Disk Identifier in the fstab file to UUID?
- How Do I Obtain the Drive Letter of an EVS Disk?
- Are the EVS Disk Device Names on the Console and the Device Names in BMS OSs Consistent?
- Why Is the EVS Disk Size Not Updated in the BMS OS After the EVS Disk Capacity Has Been Expanded?
- How Can I Restore System Disk Data Using the Snapshot?
- What Do I Do to Prevent Risks of Attaching or Detaching the System Disk?
- How Do I Select Storage?
- Why Is the Disk Capacity Displayed in the BMS OS Less Than That Displayed on the Official Website?
-
OS FAQ
- Can I Install or Upgrade BMS OSs by Myself?
- Can I Change the OS of a BMS?
- Is a GUI Provided for BMS OSs?
- Is an Upload Tool Delivered with BMS OSs?
- Does the Public Image Used to Create a BMS Have a Swap Partition?
- How Do I Configure the Static Host Name of a BMS?
- How Do I Set the Password Validity Period?
- How Do I Set SSH Configuration Items?
- How Can I Handle the Eight-Hour Difference Between the Windows BMS and Local Time
- How Do I Change the SID of a Windows Server 2012 BMS?
- How Do I Change the Kernel Version of CentOS 7 BMSs?
- How Do I Reserve Log Space If the Root Partition Automatically Expands Disks?
- How Do I Roll Back the Kernel Version If I Mistakenly Upgrade the Kernel?
- How Do I Increase the Swap Partition Size?
- How Do I Increase the Size of the Root Partition of a BMS Which Is Quickly Provisioned?
- Common Linux Commands
- How Do I Update the Disk Metadata After the LVM Volume Is Remounted?
- How Do I Handle a Network Failure After Services Are Switched from a Windows BMS Booted from an EVS Disk to an HA BMS?
-
General FAQ
-
Troubleshooting
- What Do I Do If I Cannot Log In to My BMS or the BMS EVS Disk Is Lost After the BMS Is Started or Restarted?
- What Do I Do If a Key Pair Created Using PuTTYgen Cannot Be Imported to the Management Console?
- What Do I Do If Disks Cannot Be Attached to a BMS That Restarts Abnormally?
- What Do I Do If an EVS Disk Attached to a Windows BMS Is in Offline State?
- Video
-
More Documents
-
User Guide (Paris Region)
- Overview
- Getting Started
- Instance
- Image
-
Disk
- Attaching Data Disks
-
Initializing Data Disks
- Introduction to Data Disk Initialization Scenarios and Partition Styles
- Initializing a Windows Data Disk (Windows Server 2016)
- Initializing a Linux Data Disk (fdisk)
- Initializing a Linux Data Disk (parted)
- Initializing a Windows Data Disk Greater Than 2 TB (Windows Server 2012)
- Initializing a Linux Data Disk Greater Than 2 TB (parted)
- Detaching a Disk
- Expanding Disk Capacity
- Key Pair and Password
-
Network
- EIP
- VPC
- High-Speed Network
-
User-defined VLAN
- Overview
- Configuring a User-defined VLAN (SUSE Linux Enterprise Server 12)
- Configuring a User-defined VLAN (SUSE Linux Enterprise Server 11)
- Configuring a User-defined VLAN (Red Hat, CentOS, Oracle Linux, and EulerOS)
- Configuring a User-defined VLAN (Ubuntu)
- Configuring a User-defined VLAN (Windows Server)
- IB Network
- Security
- Server Monitoring
-
Troubleshooting
- What Do I Do If I Cannot Log In to My BMS or the BMS EVS Disk Is Lost After the BMS Is Started or Restarted?
- What Do I Do If a Key Pair Created Using PuTTYgen Cannot Be Imported to the Management Console?
- What Do I Do If Disks Cannot Be Attached to a BMS That Restarts Abnormally?
- What Do I Do If an EVS Disk Attached to a Windows BMS Is in Offline State?
-
FAQs
- General FAQs
-
Instance FAQs
- How Long Does It Take to Create a BMS?
- Why Is Failed Displayed for a BMS Application Task But the BMS List Shows the Obtained BMS?
- How Can I Quickly Provision BMSs Using EVS Disks?
- What Are the Advanced Features of BMSs Using EVS Disks?
- Is the BMS Host Name with Suffix novalocal Normal?
- How Can I Check the BMS Monitoring Status?
- How Do I Create an Agency for Server Monitoring of the BMS?
- Login FAQs
-
Network and Security FAQs
- Can BMSs of Different Accounts Communicate with Each Other over an Internal Network?
- How Do Two BMSs in the Same Region But Different AZs Communicate with Each Other?
- Are My BMSs in the Same Subnet?
- Can BMSs Communicate with ECSs in the Same VPC?
- Can Multiple EIPs Be Bound to a BMS?
- Can I Configure the EIP?
- How Can I Modify the Network Configuration or Restart the Network If I Can Log In to a BMS Using Only SSH?
- What Do I Do If the Communication Between the Primary NIC and Extension NIC of the BMS is Abnormal?
- How Can I Configure a Static IP Address for a BMS?
- How Do I Configure the DNS Server?
-
Disk FAQs
- Can EVS Disks Be Attached to BMSs?
- What Are the Restrictions for Attaching a Disk to a BMS?
- How Do I Change the Disk Identifier in the fstab file to UUID?
- How Do I Obtain the Drive Letter of an EVS Disk?
- Are the EVS Disk Device Names on the Console and the Device Names in BMS OSs Consistent?
- Why Is the EVS Disk Size Not Updated in the BMS OS After the EVS Disk Capacity Has Been Expanded?
- How Can I Restore System Disk Data Using the Snapshot?
- What Do I Do to Prevent Risks of Attaching or Detaching the System Disk?
- How Should I Select Storage?
- Why Is the Disk Capacity Displayed in the BMS OS Less Than That Displayed on the Official Website?
-
OS FAQs
- Can I Install or Upgrade BMS OSs by Myself?
- Can the BMS OS Be Replaced?
- Is a GUI Provided for BMS OSs?
- Is an Upload Tool Delivered with BMS OSs?
- How Do I Configure the Static Host Name of a BMS?
- How Do I Set the Password Validity Period?
- How Do I Set SSH Configuration Items?
- How Can I Handle the Eight-Hour Difference Between the Windows BMS and Local Time
- How Can I Activate a Windows BMS?
- How Do I Change the SID of a Windows Server 2012 BMS?
- How Do I Reserve Log Space If the Root Partition Automatically Expands Disks?
- How Do I Roll Back the Kernel Version If I Mistakenly Upgrade the Kernel?
- How Do I Increase the Swap Partition Size?
- Change History
-
API Reference (Paris Region)
- Before You Start
- API Overview
- Calling APIs
- BMS APIs
- Native OpenStack Nova V2.1 APIs
- Public Parameters
- Permissions Policies and Supported Actions
- Appendix
- Change History
-
User Guide (Paris Region)
- General Reference
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Initializing a Linux Data Disk (fdisk)
Scenarios
This section uses CentOS 7.0 64-bit as an example.
The maximum disk capacity supported by MBR is 2 TB, and that supported by GPT is 18 EB. Therefore, use the GPT partition style if your disk capacity is greater than 2 TB. In Linux OSs, if the GPT partition style is used, the fdisk partitioning tool cannot be used. The parted partitioning tool must be used. For details about disk partition styles, see Introduction to Data Disk Initialization Scenarios and Partition Styles.
The method for initializing a disk varies depending on the OSs running on the BMS. This document is for reference only. For detailed operations and differences, see the product documents of the OSs running on the corresponding BMSs.
Prerequisites
- You have logged in to the BMS.
- A data disk has been attached to the BMS and has not been initialized.
Create Partitions and Attach a Disk
The following example shows you how to use fdisk to create a primary partition on a data disk that has been attached to the BMS. The default partitioning style is MBR and the default file system format is ext4. Mount the file system to /mnt/sdc, and configure automatic mounting upon system start.
- Run the following command to query information about the added data disk:
fdisk -l
Information similar to the following is displayed:
[root@bms-b656 test]# fdisk -l Disk /dev/sda: 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: 0x000cc4ad Device Boot Start End Blocks Id System /dev/xvda1 * 2048 2050047 1024000 83 Linux /dev/xvda2 2050048 22530047 10240000 83 Linux /dev/xvda3 22530048 24578047 1024000 83 Linux /dev/xvda4 24578048 83886079 29654016 5 Extended /dev/xvda5 24580096 26628095 1024000 82 Linux swap / Solaris Disk /dev/sdb: 10.7 GB, 10737418240 bytes, 20971520 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
The command output shows that the BMS has two disks, system disk /dev/sda and data disk /dev/sdb.
- Run the following command to use fdisk to perform the partitioning operations for the added data disk:
fdisk Newly added data disk
For example, run the following command to use fdisk to perform the partitioning operations for the /dev/sdb data disk:
fdisk /dev/sdb
Information similar to the following is displayed:
[root@ecs-b656 test]# fdisk /dev/sdb 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 0xb00005bd. 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.
- Recreate the partition with the same partition type as before. In this example a primary partition is used. 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 can be 1 to 4.
- Enter the same partition number as the partition had before and press Enter. Primary partition number 1 is used in this example.
Information similar to the following is displayed:
Partition number (1-4, default 1): 1 First sector (2048-20971519, default 2048):
First sector indicates the start cylinder number. The value can be 2048 to 20971519, and the default value is 2048.
- Ensure that you enter the same first cylinder as the partition had before. In this example, we previously noted down 2048, so we type in 2048 here and press Enter.
Information similar to the following is displayed:
First sector (2048-20971519, default 2048): Using default value 2048 Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519):
Last sector indicates the end cylinder number. The value can be 2048 to 20971519, and the default value is 20971519.
- In this example, select the default end cylinder number 20971519 and press Enter.
Information similar to the following is displayed:
Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519): Using default value 20971519 Partition 1 of type Linux and of size 10 GiB is set Command (m for help):
A primary partition has been created for a 10-GB data disk.
- Enter p and press Enter to view the details about the created partition.
Information similar to the following is displayed:
Command (m for help): p Disk /dev/sdb: 10.7 GB, 10737418240 bytes, 20971520 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: 0xb00005bd Device Boot Start End Blocks Id System /dev/sdb1 2048 20971519 10484736 83 Linux Command (m for help):
Details about the /dev/sdb1 partition are displayed.
- Enter w and press Enter to write the partition result into 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 successfully 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 format for the file system of the newly created partition:
mkfs -t File system format /dev/sdb1
For example, run the following command to set the ext4 file system for the /dev/sdb1 partition:
mkfs -t ext4 /dev/sdb1
Information similar to the following is displayed:
[root@bms-b656 test]# mkfs -t ext4 /dev/sdb1 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 655360 inodes, 2621184 blocks 131059 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=2151677952 80 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 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.
NOTE:
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
For example, run the following command to create the /mnt/sdc mount point:
mkdir /mnt/sdc
- Run the following command to mount the new partition on the mount point created in 12:
mount /dev/sdb1 Mount point
For example, run the following command to mount the newly created partition on /mnt/sdc:
mount /dev/sdb1 /mnt/sdc
- Run the following command to view the mount result:
df -TH
Information similar to the following is displayed:
[root@bms-b656 test]# df -TH Filesystem Type Size Used Avail Use% Mounted on /dev/xvda2 xfs 11G 7.4G 3.2G 71% / devtmpfs devtmpfs 4.1G 0 4.1G 0% /dev tmpfs tmpfs 4.1G 82k 4.1G 1% /dev/shm tmpfs tmpfs 4.1G 9.2M 4.1G 1% /run tmpfs tmpfs 4.1G 0 4.1G 0% /sys/fs/cgroup /dev/sda3 xfs 1.1G 39M 1.1G 4% /home /dev/sda1 xfs 1.1G 131M 915M 13% /boot /dev/sdb1 ext4 11G 38M 9.9G 1% /mnt/sdc
The newly created /dev/sdb1 is mounted on /mnt/sdc.
Set Automatic Disk Attachment Upon BMS Start
To automatically attach a disk when a BMS starts, you should not specify its partition, for example /dev/sdb1, in /etc/fstab. This is because the sequence of cloud devices may change during the server start or stop process, for example, from /dev/sdb to /dev/sdc. You are advised to use the universally unique identifier (UUID) in /etc/fstab to automatically attach a disk at system start.
The universally unique identifier (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
For example, run the following command to query the UUID of /dev/sdb1:
blkid /dev/sdb1
Information similar to the following is displayed:
[root@bms-b656 test]# blkid /dev/sdb1 /dev/sdb1: UUID="1851e23f-1c57-40ab-86bb-5fc5fc606ffa" TYPE="ext4"
The UUID of /dev/sdb1 is displayed.
- Run the following command to open the fstab file using the vi editor:
vi /etc/fstab
- Press i to enter the editing mode.
- Move the cursor to the end of the file and press Enter. Then add the following information:
UUID=1851e23f-1c57-40ab-86bb-5fc5fc606ffa /mnt/sdc ext4 defaults 0 2
- Press Esc, enter :wq, and press Enter.
The system saves the configurations and exits the vi editor.
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