Dell PowerVault MD3820f - Manual (Page 226)

• The number of snapshot virtual disks that can be created using a single snapshot set varies with the
I/O load on the RAID controller modules. Under little or no I/O load, the number of virtual disks in a
snapshot set must be limited to eight. Under high I/O loads, the limit must be three.
• The snapshot virtual disks created in the MD Storage Manager are differential snapshots. Plex
snapshots are not supported.
• Virtual disks to be used as source virtual disks for VSS snapshots must not have names longer than 16
characters. The VSS hardware provider uses the base virtual disk name as a prefix for the snapshot and
repository virtual disk names. The resulting snapshot and repository names are too long if the source
virtual disk name exceeds 16 characters.
NOTE: A volume is another term for virtual disk.
For more information on VDS and VSS, see microsoft.com.
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