Dell PowerVault MD3820f - Manual (Page 88)

Thin Virtual Disk States
The following are the virtual disk states displayed in MD Storage Manager:
• Optimal — Virtual disk is operating normally.
• Full — Physical capacity of a thin virtual disk is full and no more host write requests can be processed.
• Over Threshold — Physical capacity of a thin virtual disk is at or beyond the specified Warning
Threshold percentage. The storage array status is shown as Needs Attention.
• Failed — Virtual disk failed, and is no longer available for read or write operations. The storage array
status is shown as Needs Attention.
Comparison—Types Of Virtual Disks And Copy Services
The availability of copy services depends on the type of virtual disk that you are working with.
The following table shows the copy services features supported on each type of virtual disk.
Copy Services Feature Standard Virtual Disk in a
Disk Group
Standard Virtual Disk in a
Disk Pool
Thin Virtual Disk
Snapshot (Legacy) Supported Not supported Not supported
Snapshot image Supported Supported Supported
Snapshot virtual disk Supported Supported Supported
Rollback of snapshot Supported Supported Supported
Delete virtual disk with
snapshot images or
snapshot virtual disks Supported Supported Supported
Consistency group
membership Supported Supported Supported
Remote Replication
(Legacy) Supported Not supported Not supported
Remote Replication Supported Supported Not supported
The source of a virtual disk copy can be either a standard virtual disk in a disk group, a standard virtual
disk in a disk pool, or a thin virtual disk. The target of a virtual disk copy can be only a standard virtual disk
in a disk group or a standard virtual disk in a disk pool, not a thin virtual disk. The following table
summarizes the types of virtual disks you can use in a virtual disk copy.
Virtual Disk Copy Source Virtual Disk Copy Target Availability
Standard virtual disk Standard virtual disk Supported
Thin virtual disk Standard virtual disk Supported
Standard virtual disk Thin virtual disk Not supported
Thin virtual disk Thin virtual disk Not supported
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