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zhangyue d05287d5d6 EVS UMN DOC 
Reviewed-by: Miskanin, Jan <jan.miskanin@t-systems.com>
Co-authored-by: zhangyue <zhangyue164@huawei.com>
Co-committed-by: zhangyue <zhangyue164@huawei.com>
2024-05-09 07:19:17 +00:00

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EVS Disk Status

An EVS disk has several statuses. Table 1 lists EVS disk statuses, the meaning of each status, and the operations a disk in each status allows.
Table 1 Disk status details

EVS Disk Status

Status Description

Allowed Operation

In-use

The EVS disk is attached to a server and is in use.
  • Detaching
  • Creating backups
  • Expanding capacity
    NOTE:

    A shared In-use EVS disk can be attached.

    A shared In-use EVS disk cannot be expanded.

Available

The EVS disk has not been attached to any server and can be attached.
  • Attaching
  • Expanding capacity
  • Deleting
  • Creating backups
  • Rolling back snapshots to EVS disks

Creating

The EVS disk is being created.

None

Attaching

The EVS disk is being attached to a server.

None

Detaching

The EVS disk is being detached from a server.

None

Deleting

The EVS disk is being deleted.

None

Restoring

A backup is being used to restore the EVS disk.

None

Expanding

The capacity of the EVS disk is being expanded.

None

Uploading

Data on the EVS disk is being uploaded to an image. This status occurs when you create an image from a server.

None

Downloading

Data is being downloaded from an image to the EVS disk. This status occurs when you create a server.

None

Error

An error occurs when you try to create an EVS disk.

Deleting

Deletion failed

An error occurs when you try to delete the EVS disk.

None

Expansion failed

An error occurs when you try to expand the capacity of the EVS disk.

Deleting

Restoration failed

An error occurs when you try to restore the EVS disk from a backup.

Deleting

Rolling back

Data on the EVS disk is being restored from a snapshot.

NOTE:
  • When you roll back from a snapshot, you can only restore the data to the original disk. Data restoration to a specific disk is not possible.
  • A snapshot can only be used for rollback when its source disk is in the Available or Rollback failed state.

None

Rollback failed

An error occurs when the EVS disk is rolled back from a snapshot.
  • Deleting
  • Rolling back snapshots to EVS disks

Awaiting transfer

The EVS disk is awaiting for a transfer.

None
Figure 1 Change of some EVS disk statuses

If an EVS disk status is Error, Deletion failed, Expansion failed, Restoration failed, or Rollback failed, you can rectify the error by referring to What Should I Do If an Error Occurs on My EVS Disk?.

Parent topic: Appendix