18-8 Dell PowerVault 720N, 740N, and 760N System Administrator and Command Reference Guide
The disk is specified correctly.
The specified disk is a spare.

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You might get a message similar to the following:
The system cannot boot with more than one disk missing from a RAID
group.
This message indicates that a volume might be missing some disks because either
not all the disks in a volume were transferred to a new filer or disks were damaged.
Make sure that all the disks in a volume were transferred. If the problem persists, it
might mean that disks were damaged. Complete the following steps to resolve the
problem.
1. Display the boot menu from diskette, as described in Booting From System
Boot Diskette, then choose Maintenance mode boot.
2. Use the vol offline command to take the volume off-line.
3. Reboot the filer; the volume specified in Step 2 is off-line.
4. Add missing disks, if possible, then bring them on-line; other wise, follow these
steps:
a. Replace any broken disks.
b. Destroy the old volume.
c. Create a new volume.
d. Use the restore command to restore the contents of the old volume from
a backup tape.
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The file system rarely becomes inconsistent. However, an inconsistent file system
can be a result of combined disk and NVRAM failure.

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If your file system becomes inconsistent, contact Dell technical support for assis-
tance, as described in Getting Technical Assistance.