ioSafe R4 - Manual (Page 46)

P/N: 900-10004-00 REV 02 USER GUIDE, IOSAFE R4 46
You can traverse a snapshot share just as you would a normal share except that the snapshot share is
read-only. If you wish, you can select a detailed listing to show the snapshot time in the description
field.
Snapshots can expire when the snapshot reserved space is filled. The snapshot mechanism keeps
track of data that has been changed from the original volume starting at the point when the snapshot
is taken. All these changes are kept in the snapshot reserved space on the volume. If you look at the
Disk space utilization information just below the Volume tab, you will see how much space has
been reserved for snapshots.
After snapshot is taken, if changes on the volume exceed this reserved space, the snapshot is
invalidated and can no longer be used.
Note
Changes that occupy space in the snapshot reserved space include new file
creation, modifications, and deletions; for instance, any time you delete a
1MB file, the change caused by the deletion will use up 1MB of reserved
space.
When the snapshot does become invalidated, an email alert will be sent and the status will be
reflected in the Snapshot tab. The snapshot is no longer usable at this stage.
► R E S I Z I N G S N A P S H O T S P A C E
If you are constantly getting snapshot invalidation alerts, you may want to either increase the
frequency of the snapshot, or consider increasing the snapshot reserved space. To do this, or to
eliminate your existing snapshot space (thus increasing your usable volume space), you can specify
the desired snapshot space in the Snapshot Space box. Simply select a value from the selection box
and click Save. Your snapshot space will be limited to approximately 100GB.