Check Consistency Feature; Executing Check Consistency - NEC Express5800 series User Manual

42 Operation

3.4 Check Consistency Feature

The check consistency feature checks consistency and automatically corrects data if some
inconsistency is detected.
IMPORTANT: The Check Consistency function and the Patrol Read
function allow you to find the defects (due to degradation such as aging) in
files of low access frequency and unused areas as soon as possible. In
rebuilding after replacement of a HDD due to a failure, subsequent defects
may be found in remaining HDDs. In such a case, the system cannot be
recovered. Thus, detecting subsequent defects as early as possible is
extremely effective as preventive maintenance. Periodical synchronization
or media patrol is effective to keep the stable operation of your system. It is
strongly recommended to take the action once per week or at least once per
month.
3.4.1

Executing Check Consistency

The check consistency is executed in the following procedure.
Check consistency execution procedure
The check consistency can be executed in any of the following three ways.
Starting execution on menu bar
Starting execution on menu displayed by right-clicking
Starting execution on [Operations] tab
The execution procedures in the ways are described below.
Starting execution on menu bar
1. Select [Group Operations] → [Check Consistency] on the menu bar.