Dell PowerVault MD3260i CLI Guide - Page 80
Running A Consistency Check, Resetting A RAID Controller Module, mediaScanEnabled=TRUE | FALSE
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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 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 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)] 80