Dell PowerVault MD3220 Cli Manual page 92

• Media scan enabled
• Errors detected during a scan of a user virtual disk are reported to the MEL
and handled as:
– Unrecovered media error — The physical disk could not read the
requested data on its first attempt or on any subsequent retries. For
virtual disks with redundancy protection, the data could not be
reconstructed from the redundant copy. The error is not corrected but
it is reported to the MEL.
– Reconstructed media error — The physical disk could not read the
requested data on its first attempt or on any subsequent retries. The
data is reconstructed from the redundant copy, rewritten to the drive,
verified, and the error is reported to the MEL.
– Recovered media error — The physical disk could not read the
requested data on its first attempt. The result of this action is that the
data is rewritten to the physical disk and verified. The error is reported
to the MEL.
– Consistency mismatches — Consistency errors are found, and a media
error is forced on the block stripe so that it is found when the physical
disk is scanned again. If consistency is repaired, this forced media error
is removed. The result of this action is that the first ten consistency
mismatches found on a virtual disk are reported to the MEL.
– Unfixable error — The data could not be read and consistency
information could not be used to regenerate it. For example,
consistency information cannot be used to reconstruct data on a
degraded virtual disk. The result of this action is that the error is
reported to the MEL.
The script command set provides two commands to define media
scan properties:
• set virtualDisks
• set storageArray
The set virtualDisk command enables a media scan for the virtual disk.
The following syntax is the general form of the command:
92
Maintaining a Storage Array