Step 1: Expand Disk Capacity
Scenarios
When your EVS disk capacity is insufficient, you can expand the disk capacity on the console to prevent any data loss that may be caused by insufficient storage space.
Prerequisites
Ensure that the disk meets the following conditions:
- The status of a non-shared disk is In-use or Available.
- The status of a shared disk is Available. If the shared disk status is In-use, detach the disk from all of its servers and then expand the capacity.
- The disk has been backed up using CBR or snapshots. For details about backups, see Backing Up EVS Disks. For details about snapshots, see Managing EVS Snapshots.
Ensure that the server meets the following conditions:
- If the disk status is In-use, the server status must be Running or Stopped.
- If the disk status is In-use, the server OS must meet the requirements describes in Related Operations.
If the server OS does not meet the requirements, detach the disk and then expand the capacity. Otherwise, you may need to stop and start the server to make the disk capacity larger.
Notes and Constraints
- Disk capacity can be expanded, but cannot be reduced.
- The maximum capacity of a system disk is 1 TiB, and that of a data disk is 32 TiB. The minimum expansion increment is 1 GiB for both system disks and data disks.
Procedure
- Log in to the management console.
- Choose an expansion entry.
- To expand the disk on the ECS console (suitable for a disk that has been attached to an ECS):
- Choose Compute > Elastic Cloud Server to go to the ECS list page.
- Click the name of the server to go to the Summary page.
- Click the Disks tab, locate the target disk, and click Expand Capacity in the Operation column.
- To expand the disk on the EVS console:
- Choose Storage > Elastic Volume Service to go to the EVS console.
- Locate the disk you want to expand and click Expand Capacity in the Operation column.
- To expand the disk on the ECS console (suitable for a disk that has been attached to an ECS):
- On the Expand Capacity page, set New Capacity and click Next.
- In the displayed Note dialog box, read the note, and click Expand Capacity.
- On the Expand Capacity page, check the disk details.
- Click Submit to start the expansion of a pay-per-use disk. For a yearly/monthly disk, the expansion starts after you complete the payment.
- Click Previous to change the settings.
- In the disk list, view the capacity of the target disk.
When the disk status changes from Expanding to In-use or Available, and the disk capacity increases, the expansion is successful.
When the disk is in the Expanding state, you cannot modify the specifications of the ECS where the disk is attached.
- (Optional) Skip this step if the disk status is In-use (attached to a server). Attach the disk to a server if the disk status is Available. For details, see Step 3: Attaching an EVS Disk.
- Log in to the server and extend the partition and file system after the disk has been expanded on the console, because previous steps only enlarge the disk space.
The operations vary depending on the server OS.
- For Linux, see Extending Disk Partitions and File Systems (Linux).
- For Windows, see Extending Disk Partitions and File Systems (Windows).
Related Operations
Perform the following operations to check whether your server OS allows you to expand In-use disks:
- Check your server image. Certain public images and private images same as those public images support capacity expansion of In-use disks, and do not require the servers to be stopped and then started after the expansion.
To view such images, log in to the console, click
in the navigation pane on the left, and choose Compute > Image Management Service. On the Public Images tab, view the images of the ECS system disk image type.
- If your server OS is not in the image list, check whether it is included in Table 1.
If it is included in Table 1, you can expand capacity while the disk is in use, and do not need to stop and start the server after the expansion. Otherwise, you must detach the disk and then expand its capacity, or stop and start the server after the expansion.
Table 1 OSs that support the capacity expansion of In-use disks OS
Version
CentOS 8
8.0 64-bit or later
CentOS 7
7.2 64-bit or later
CentOS 6
6.5 64-bit or later
Debian
8.5.0 64-bit or later
Fedora
24 64-bit or later
SUSE 12
SUSE Linux Enterprise Server 12 64-bit or later
SUSE 11
SUSE Linux Enterprise Server 11 SP4 64-bit
OpenSUSE
42.1 64-bit or later
Oracle Linux Server release 7
7.2 64-bit or later
Oracle Linux Server release 6
6.7 64-bit or later
Ubuntu Server
14.04 64-bit or later
Red Hat Enterprise Linux 7
7.3 64bit
Red Hat Enterprise Linux 6
6.8 64bit
EulerOS
2.2 64-bit or later
Huawei Cloud EulerOS
1.1 or later
Windows Server 2016
Windows Server 2016 R2 Enterprise 64-bit
Windows Server 2012
Windows Server 2012 R2 Standard 64-bit
Windows Server 2008
Windows Server 2008 R2 Enterprise 64-bit
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