Dell PowerVault 725N (Rackmount NAS Appliance) - Manual (Page 25)

Removing a Mirror
Removing a mirror from a volume removes or destroys the data from the selected mirror and leaves the other mirror intact. After you remove a mirror, the
space on the disk used by the removed mirrored volume becomes unallocated space. The remaining (no longer mirrored) volume becomes a simple volume on
the disk.
To remove a mirror, perform the following steps:
1. Launch Array Manager.
See " Launching Array Manager From the NAS Manager ."
2. In the Dell OpenManage Array Manager window, click the Volumes folder to expand it.
3. In the left pane, right-click a volume name, and then click Remove Mirror.
The Remove Mirror window displays.
4. Select the mirror you want to remove, and then click OK.
Breaking a Mirror
Breaking a mirror creates two simple volumes with individual drive letters. Each volume contains the data on the mirror at the time the mirror was broken. The
data is no longer redundant, but it remains intact.
To break a mirror, perform the following steps:
1. Launch Array Manager.
See " Launching Array Manager From the NAS Manager ."
2. In the Dell OpenManage Array Manager window, click the Volumes folder to expand it.
3. In the left pane, right-click a volume name, and then click Break Mirror.
The confirmation message, Are you sure you want to break the mirror? displays.
4. If you are sure you want to break the mirror, click OK.
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NOTICE: If you break the mirror, your data might not be fault-tolerant.