Name

The name of the snapshot. There are two types of snapshots: manual and automatic.

Manual Snapshots: "Name" is the name provided when the snapshot was created. Manual snapshots can be renamed by clicking on the name and entering a new value.

Automatic Snapshots: There are three types, and they cannot be renamed:

- .auto: User-configured scheduled snapshots with custom retention policies (see Scheduled Snapshots).

- .ndmp: Used for NDMP backup and automatically pruned.

- .rr: Used for remote replication and automatically pruned.

Creation

The date and time when the snapshot was created.

Unique

The amount of unique space used by the snapshot. Snapshots begin initially referencing all the same blocks as the filesystem or LUN itself. As the active filesystem diverges, blocks that have been changed in the active share may remain held by one or more snapshots. When a block is part of multiple snapshots, it will be accounted in the share snapshot usage, but will not appear in the unique space of any particular snapshot. The unique space is blocks that are only held by a particular snapshot, and represents the amount of space that would be freed if the snapshot were to be destroyed.

Total

The total amount of space referenced by the snapshot. This represents the size of the filesystem at the time the snapshot was taken, and any snapshot can theoretically take up an amount of space equal to the total size as data blocks are rewritten.

Clones

Show the number of clones of the snapshot. When the mouse is over a snapshot row with a non-zero number of clones, a "Show..." link will appear. Clicking this link will bring up a dialog box that displays the complete list of all clones.