Users Guide

Snapshot Space Borrowing
Snapshot space borrowing is enabled by default for all volumes created PS Series groups running firmware version 6.0 and
higher, and snapshot space borrowing can be enabled on volumes created before the group was updated to version 6.0 and
higher.
When snapshot space borrowing is enabled for a volume, its Smart Copies display the following properties:
● Snapshot Space Borrowing (enabled/disabled/unavailable)
● Snapshot Borrow Space In Use—Amount of space that the Smart Copy (snapshot) is using from borrowed space.
If snapshot space borrowing is enabled, the only supported snapshot reserve policy is to delete the oldest Smart Copy.
Snapshot space borrowing is mutually exclusive of the snapshot space recovery policy of setting the volume and its
snapshots (Smart Copies) offline.
● Features—Supports Synchronous Replication. Indicates that the volume is enabled for SyncRep. If the Smart Copy supports
SyncRep, the replication state is Not configured.
The Smart Copy list displays all the available Smart Copies for both the Sync-Active and Sync-Alternate volumes, but only
the Smart Copies for Sync-Active volumes can be restored. See the Dell EqualLogic Group Manager Administrator’s Guide
for more information.
NOTE: If snapshot space borrowing is enabled but the volume has no snapshot reserve space configured, you cannot
create a Smart Copy. Contact the administrator of the PS Series group if this volume is supposed to support Smart
Copy creation.
View Available Smart Copies
The Smart Copies node in the tree panel displays all the Smart Copies that have been created. The tree structure includes three
layers of nodes under the Smart Copy node. You can right-click on any node to view the available actions. For example, restore
and mount operations can be performed from the second layer under the Smart Copy node.
The following table shows the locations of Smart Copies under the Smart Copies node.
Table 18. Locations of Smart Copies Under the Smart Copies Node
Smart Copy of Object Type Location Comments
Individual volumes Under the associated volume name For example, a Smart Copy of volume E:\ is
shown under the Smart Copy node, under the
name E:\.
Specific collection Under the collection name None
Application component Under the application component
name
None
Any Smart Copy Unreachable node See Troubleshooting Unreachable Smart Copies
Any Smart Copy Broken node See Troubleshooting Broken Smart Copies
Any Smart Copy Recoverable node See Troubleshooting Recoverable Smart Copies
Troubleshooting Unreachable Smart Copies
A Smart Copy is considered unreachable when ASM/ME cannot reach a PS Series group during the validation process.
Connection to the group or member might have been lost, or a Smart Copy made from a clustered environment may be
unreachable. Usually these Smart Copies are not listed under the Unreachable node, but as a regular Smart Copy with an
unreachable icon instead of the normal volume or application icon.
Find out why ASM/ME cannot reach the group and correct the problem, or wait until the connection is reestablished
automatically.
General ASM/ME Operations
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