Synchronizing Logical Drive - NEC Express5800 Series User Manual

3.10 Synchronizing Logical Drive

Routine synchronization allows inconsistencies to be detected and repaired to prevent rebuilding
from failing at a HDD fault. This is available for logical drives of RAID 1, 5, or 10. In order to
keep the stable operation of the RAID system, it is strongly recommended to provide the routine
synchronization by using the scheduling feature. Because synchronization can continue at a
constant rate under heavy system load, it is recommended to use the synchronization in an
environment where the HDDs are frequently accessed and the system is always subject to load.
IMPORTANT:
To synchronize a logical drive, follow the procedure below:
1. Click the Logical Drive View icon in the Tree View.
2. Click the Synchronization Schedule tab in the Management Window.
3. Select [Fix] or [Redundancy Check] from the [Policy] pull-down menu.
Fix:
Redundancy Check: If an inconsistency error is detected, the process is continued
Redundancy check is not possible for all logical drives
including non-initialized RAID. If you try, the
following message is registered and the redundancy
check is not performed.
Redundancy Check was rejected because
the logical drive "Logical Drive 1" has
never been initialized.
If the system aborts just after the start of
synchronization, the progress in the following
message registered to the log may not appear
correctly:
Synchronization on BOOT_RAID1 aborted
at %d%%.
Synchronization on BOOT_RAID1 paused
at %d%%.
If an inconsistency error is detected, data is repaired from the
other mating disk configuring the RAID.
without repair of the error.
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