Patrol Read; Consistency Check; Background Initialize - NEC Express5800 120Rj-2 User Manual

User Guide

Patrol Read

The Patrol Read performs a read & verify test in the entire area of the HDDs. It can be
performed for all the HDDs assigned to virtual disks and hot-spares.
The Patrol Read allows subsequent defects of the HDDs to be detected and repaired.
For HDDs configuring redundant virtual disks or those assigned to hot-spares, the error
sectors detected during the Patrol Read can be repaired.
■
For the Internal RAID Controller, the Patrol Read feature is
factory-set to "Enabled". For the external SAS RAID control-
ler, the Patrol Read feature is either enabled or disabled
depending on 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

Use the Consistency Check to check the consistency among the virtual drives. It is
available for redundant virtual drives except for RAID0. It is also available for the hot
spare.
The Consistency Check can be performed through WebBIOS or the Universal RAID
Utility.
The Consistency Check performs not only a Consistency Check but also repairs the
error sectors. It can also be used as a preventive maintenance.
■
During Consistency Check, the processing rate is decreased
due to the high load.
■
If the system is restarted, the Consistency Check is aborted,
but resumes afterwards.
■
To schedule the execution of the Consistency Check, use
WebBIOS, not the Universal RAID Utility

Background Initialize

The Background Initialize is automatically executed when a RAID5 virtual disk is
created in the disk group including five or more HDDs.
Note the following for the Patrol Read:
Note the following for the Consistency Check:
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