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Syncro CS 9286-8e Solution User Guide

March 2013

Chapter 4: System Administration

Performing Preventive Measures on Disk Drives and VDs

4.5 Performing Preventive Measures on Disk Drives and VDs

The following drive and VD-level operations help to proactively detect disk drive and VD errors that could potentially

cause the failure of a controller node. For more information about these operations, refer to the MegaRAID SAS

Software User Guide.

 Patrol Read – A patrol read periodically verifies all sectors of disk drives that are connected to a controller,

including the system reserved area in the RAID configured drives. You can run a patrol read for all RAID levels and

for all hot spare drives. A patrol read is initiated only when the controller is idle for a defined time period and has

no other background activities.

 Consistency Check – You should periodically run a consistency check on fault-tolerant VDs (RAID 1, RAID 5,

RAID 6, RAID 10, RAID 50, and RAID 60 configurations; RAID 0 does not provide data redundancy). A consistency

check scans the VDs to determine whether the data has become corrupted and needs to be restored.

For example, in a VD with parity, a consistency check computes the data on one drive and compares the results to

the contents of the parity drive. You must run a consistency check if you suspect that the data on the VD might be

corrupted.

NOTE Be sure to back up the data before running a consistency check if you

think the data might be corrupted.

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LSI Syncro CS 9286-8e Guía de usuario Pagina 41