Avago Technologies Syncro CS 9271-8i User Manual
Page 70
LSI Corporation
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Syncro CS 9271-8i Solution User Guide
October 2013
Chapter 4: System Administration
Performing Preventive Measures on Disk Drives and VDs
4.
Install the MegaSAS driver RPM.
Uninstall the earlier version first, if necessary.
5.
Reboot the system to load the driver.
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.