Create a disk

Last update: December 05 2024

Create a disk

Network disk can be created together with the cloud server or can be created separately and then connected to the server.

Local disk is only created in conjunction with the cloud server.

You can create a network disk from a variety of sources:

• empty — this disk initially contains no data. You can use it to scale the disk space on the cloud server;
• from an image — prepared by Selectel or your own downloaded image. You can use it to replace the boot disk when restoring a server or to clone a server;
• from another disk, snapshot or backup — create a copy of the disk.

The cost of a network disk depends on disk type and pool segment in which it is created. You can calculate the cost in resource calculator.

Control panel

1. In control panel go to Cloud platform → Disks.
2. Click Create a disk.
3. Enter a new disk name or leave the name that is automatically created.
4. Select the location of the disk — pool and pool segment. This should be the cloud server pool segment to which you will later connect the disk. The pool segment affects the cost and limits of the disk.
5. Select the source of the disk (finished image, own image, disk, snapshot or backup) and press Select. If you want to create a blank disk, skip this step.
6. Select disk type. The disks differ in read/write speeds and throughput values.
7. Specify the size of the disk in GB. The size of the disk created from the source must be equal to or larger than the size of the source. We recommend that you do not exceed disk limitations to the maximum size. Once created, the disk cannot be shrunk directly.
8. If you selected the Universal v2 disk type, specify the total number of read and write operations in IOPS. After creating a disk, you can change the number of IOPS — decrease or increase. There is no limit to the number of IOPS changes.
9. Customize the creation of scheduled backups for the disk. Select a previously created plan or create a new one.
10. Click Create a disk.

OpenStack CLI

1. Open the OpenStack CLI.

2. Create a network drive:

   openstack volume create
       [--image <image> | --snapshot <snapshot> | --source <volume>] \
       --size <size> \
       --type <volume_type> \
       --property total_iops_sec='<iops_number>'
       --availability-zone <pool_segment> \
       <volume_name>

   Specify:

   • source type:
     • to create a blank disk, do not specify a source type;
     • --image <image> — to create a disk from finished or own image. Parameter <image> — ID or image name. You can view the list of images using openstack image list;
     • --snapshot <snapshot> — to create a disk from snapshot. Parameter <snapshot> — ID or name of the snapshot. You can view the list of snapshots with openstack snapshot list;
     • --source <volume> — to create a disk from another network drive. Parameter <volume> — ID or disk name. You can view the list of network drives by openstack volume list;
   • <size> — disk size in GB. For disks from the source, the minimum size must be equal to the size of the source. Take into account network disk limits to the maximum size;
   • <volume_type> — ID or name network drive type. For example, universal2.ru-9a — name to create a network drive with the SSD Universal v2 type in the pool segment ru-9a. The list of types can be viewed with openstack volume type list or in a table List of network disk types in all pool segments;
   • optional: --property total_iops_sec='<iops_number>' — to specify the number of IOPS of a network disk of type Universal v2. Parameter <iops_number> — total number of read and write operations. The available values range from 2,000 to 16,000 IOPS. If you do not specify a value, the default value of 2,000 IOPS will be used.
   • <pool_segment> — the pool segment where the network disk will be created, e.g. ru-9a. The list of available pool segments can be found in the instructions Availability matrices;
   • <volume_name> — disk name.