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10.4.2 Recovery from a failure in one HDD
Never remove an HDD when the HDD status lamp of the HDD is OFF. If you do,
the data stored in the HDD gets corrupted.
Wear cotton gloves when replacing an HDD in order to prevent problems caused
by static electricity. If you do not, the data stored on the HDD may get corrupted.
Make sure you check the correct procedure before you start the work. If you do not
follow the correct procedure, the data stored on the HDD may be lost.
As a replacement HDD, do not use an HDD previously used in the A model or the
B model. If you do, this equipment may not operate properly or the data on the
HDDs may be lost because of configuration information mismatches or other
reasons.
Mount an HDD securely. Loose contacts and missing screws may result in a
failure.
Do not subject an HDD you are mounting and the already mounted HDDs to
shock while replacing an HDD. Otherwise, failure of the equipment may result.
Until the rebuild is complete, avoid shutting off the power for this equipment or
attaching and detaching HDDs. Otherwise, the data on the HDDs may be lost or a
failure may result.
To recover from a single-system HDD failure, perform the procedure below.
For recovery from the backup HDD, see "10.5.2 Recovery Using a Backup HDD".
(1) Rebuilding with the OS running
• This computer can change the load of writing data to HDDs, which is applied to
the system during rebuilding. Change settings with consideration to the effect on
system operation during rebuilding. The default setting is "HIGH", which enables
rebuild processing with a high load. Setting to a lower load of writing requires a
longer time for rebuilding. The following shows the guideline of rebuilding time
required for a 500GB HDD with no load.
When the load is set to HIGH: 3 hours and 30 minutes
When the load is set to MIDDLE: 7 hours
When the load is set to LOW: 15 hours
• The default setting allows auto rebuilding start when an HDD is replaced. If you
want to manually start rebuilding, change the setting in advance before starting
work.
For how to change the default settings, refer to "5.3 RAID Configuration Control
Command (raidctrl)" in the HF-W2000 Model 48/45 RAS Function Manual (WIN-
63-0092).
NOTICE
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