Dell PowerVault 715N (Rackmount NAS Appliance) - Manual (Page 30)

The recovery operating system mirror is synchronized.
14. Right-click your RAID 5 data volume (shown as dynamic striped volume), and click Repair.
15. From the window, select the new hard drive (the only hard drive displayed in the options).
The RAID 5 data volume is synchronized. The synchronization might take several hours, depending on your system
configuration.
Re-establishing the Recovery Partition
This procedure re-establishes the recovery operating system mirror. The recovery operating system mirror is used to
recover the NAS appliance if the main operating system partition fails or is corrupted.
1. In the Dell OpenManage Array Manager window, right-click Disk 2, and then click Remove Mirror to remove the
existing recovery mirror between Disk 2 and Disk 3.
2. Right-click Disk 0, and then click Break Mirror to break the main mirror between Disk 0 and Disk 1.
For more information about breaking a mirror, see " Breaking a Mirror " in this section.
3. Right-click Disk 0, and then click Add Mirror to create a mirror between Disk 0 and Disk 2.
For more information about adding a mirror, see " Adding a Mirror " in this section
This mirror is used as the template for re-establishing the recovery operating system partitions.
4. After the mirror creation is complete, break the mirror between Disk 0 and Disk 2 created in step 3.
5. Right-click Disk 0, and then click Add Mirror to create a mirror between Disk 0 and Disk 1.
6. When the mirror creation is complete, reboot your NAS appliance.
7. When the NAS appliance is running, right-click Disk 2, and then click Add Mirror to create a mirror between Disk
2 and Disk 3, which re-establishes your recovery operating system mirror.
Booting From the Recovery Operating System Mirror Hard Drives
You might need the NAS appliance to boot from the recovery operating system mirror so you can perform the following
steps:
1. Perform a file restore on the main operating system mirror.
2. Access the data on the data partition and back it up to tape.
Two different procedures allow the NAS appliance to boot from the recovery operating system mirror. One procedure
requires the administrator to physically swap the hard drives in the NAS appliance.The other procedure requires that the
system administrator connect a system with HyperTerminal through a null-modem cable directly to the NAS appliance,
and then change the BIOS boot sequence.
Swapping the Physical Hard Drives
1. Turn off the NAS appliance.
2. Remove the front bezel from the NAS appliance.
3. Swap hard drives 0 and 2 with each other.
4. Swap hard drives 1 and 3 with each other.
5. Turn on the NAS appliance.
The NAS appliance boots from the hard drive operating system on hard drive 0 and 1.