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 Expanding capacity
Available	The EVS disk has not been attached to any server and can be attached.	Attaching Expanding capacity Deleting 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
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
Rolling back	Data on the EVS disk is being restored from a snapshot. NOTE: When you roll back 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 rolled back when the original disk is in the available or error_rollbacking state.	None
Rollback failed	An error occurs when the EVS disk is rolled back from a snapshot.	Deleting Rolling back snapshots to EVS disks

Figure 1 Change of some EVS disk statuses
Click to enlarge

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?.

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