Running A Consistency Check; Resetting A Raid Controller Module - Dell PowerVault MD3260 Cli Manual

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:
set (allVirtualDisks | virtualDisk
[virtualDiskName] | virtualDisks [virtualDiskName1
... virtualDiskNamen] | virtualDisk <wwid>
mediaScanEnabled=(TRUE | FALSE)
The set storageArray command defines how frequently a media scan is run on a storage array. The following syntax is
the general form of the command:
set storageArray mediaScanRate=(disabled | 1-30)

Running A Consistency Check

Consistency checks are performed when media scans are run, if consistency check is enabled on the virtual disk. (See
Running A Media Scan for an explanation about setting up and running media scans.) During a consistency check, all
data blocks in a virtual disk are scanned, and deteriorated data is corrected. The method of correction depends on the
redundant array of independent disks (RAID) levels:
• RAID 5 and RAID 6 virtual disks — Consistency is checked and repaired.
• RAID 1 virtual disks — The data is compared between the mirrored physical disks, and data inconsistencies are
repaired.
• RAID 0 virtual disks — No redundancy exists.
Before attempting a consistency check, you must enable the process with the set virtualDisk command, which
uses the following general form:
set (allVirtualDisks | virtualDisk
[virtualDiskName] | virtualDisks [virtualDiskName1
... virtualDiskNameN] | virtualDisk <wwid>
consistencyCheckEnabled=(TRUE | FALSE)

Resetting A RAID Controller Module

CAUTION: When you reset a RAID controller module, the RAID controller module is not available for I/O operations
until the reset is complete. If a host is using virtual disks owned by the RAID controller module being reset, the I/O
directed to the RAID controller module is rejected. Before resetting the RAID controller module, ensure that a
multipath driver is installed on all hosts using these virtual disks. If a multipath driver is not installed, the virtual
disks are not available.
Resetting a RAID controller module is the same as rebooting the RAID controller module processors. To reset a RAID
controller module, run the following command:
reset controller [(0 | 1)]
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