Users guide

233 Intel® RAID Software User Guide
Figure 154. Confirm Enable Snapshot
8. This virtual drive becomes a snapshot repository
. Use it only for storing snapshot-
related data.
Caution: After yo
u enable snapshots on this virtual drive, you cannot change the
allocated percentage of capacity or the snapshot repository without first
disabling snapshots and losing any snapshot data.
Note: W
ith the current generation of the MegaRAID Recovery product there is no
guidance on the size of the repository other than saying that it is completely
dependent on the amount of data being written and the frequency of snapshots
being taken. This is different in every application. Currently a customer will
have to use empirical data on the behavior of their application to estimate
this. If the repository runs out of space they will have to delete the oldest
snapshot. Then at some time when it is appropriate they will have to disable
the feature and re-enable it, re-sizing the repository.
The existing snapshots are lost when the feature is disabled. Repository
virtual drives will be lost if you disable snapshots.
In future development, users will be able to grow the size of the repository
dynamically, without losing snapshots.