User`s guide

Configuring Your Server 4-47
Patrol Read
The patrol read performs the read & verify test in the entire area of HDDs. It can be performed for all HDDs assigned as virtual
disks and hot-spares.
The Patrol Read allows subsequent defects of HDDs to be detected and repaired.
For HDDs configured as redundant virtual disks or those assigned as hot-spares, error sectors detected during Patrol Read can
be repaired.
IMPORTANT: Note the following for the patrol read feature:
 For the Internal RAID Controller, the Patrol Read feature is factory-set to "Enabled". For the
external SAS RAID controller, the Patrol Read feature is either enabled or disabled depending
on the firmware.
 To change the Patrol Read settings, use the Universal RAID Utility.
 If the system is restarted while running Patrol Read, Patrol Read resumes from the point where
it was stopped.
Consistency Check
The Consistency Check is used to check the consistency among virtual drives. It is available for redundant virtual drives except
for RAID0. It is also available for the hot spares.
Consistency Check can be performed through WebBIOS or the Universal RAID Utility.
Consistency Check performs not only consistency check but also repairs of defective sectors. Accordingly, it can be used as a
preventive maintenance.
IMPORTANT: Note the following for the Consistency Check feature:
 During the Consistency Check process, the processing rate is decreased due to the high load.
 If the system is restarted, the Consistency Check is aborted. However, the Consistency Check
resumes after restart.
 To schedule the execution of the Consistency Check feature, use WebBIOS, not the Universal
RAID Utility.