Manage Snapshots For Shares And Luns; Basic Snapshot Concepts - NETGEAR ReadyDATA 5200 Software Manual

Manage Snapshots for Shares and LUNs

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Basic Snapshot Concepts

• Automatic and Manual Snapshots
• Roll Back to a Snapshot
• Clone a Snapshot
• Delete a Snapshot
Basic Snapshot Concepts
The ReadyDATA 5200 can provide protection of shares and LUNs through snapshots.
Snapshots contain references to data on a share or LUN. Strictly speaking, snapshots are
not backups, but they function as backups because you can recover data from snapshots.
You can only take snapshots of folders or LUNs. You cannot take a snapshot of a volume.
Snapshots reside on the same volume as the folder or LUN from which they were created.
The ReadyNAS can automatically take snapshots of a folder or LUN according to a schedule
that you specify. You can also manually take or delete individual snapshots at any time.
Depending on available storage space, you can keep an unlimited number of snapshots.
If you configure both snapshots and continuous replication (see
Recovery between Two or More Systems
WARNING:
When the available storage space on a volume decreases below
200 GB, the oldest automatic snapshots are automatically deleted
to bring the available storage space back to 200 GB or higher.
Manual snapshots are never automatically deleted.
Once protection is available, the shares and LUNs on the Shares screen indicate the number
of snapshots and the number of days with protection (a share with daily protection is shown
on the left; a LUN with hourly protection is shown on the right):
Shared folder with daily snapshots
Figure 13. Shares with snapshots
ReadyDATA OS 1.2
on page 173), you have continuous protection.
Shared folder with hourly snapshots
Backup, Replication, and Recovery
158
Manage Replication and