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10. SOFTWARE RAID1
10.4.2 Recovery from a failure in one HDD
● Never remove an HDD when the DRIVE status lamp of the HDD is off. Doing so might corrupt
the data stored on the HDD.
● Wear cotton gloves when replacing an HDD to prevent problems caused by static electricity.
Not doing so might result in corruption of the data stored on the HDD.
● Verify correct procedures before starting work. Failure to follow the correct procedures might
result in data stored on an HDD being lost.
● Do not use an HDD previously used in any model as a replacement HDD. If you do, this
equipment might not operate properly or the data on the HDDs might be lost because of
configuration information mismatches or other reasons.
● Install HDDs securely. Loose contacts or missing screws might result in failure.
● During replacement, do not subject an HDD that you are replacing or an HDD that is already
installed to shocks. Subjecting an HDD to shocks might result in drive failure.
● Until rebuilding is complete, avoid shutting off the power to this equipment or installing and
removing HDDs. Performing these actions might result in data on the HDDs being lost or a
failure.
To recover from a failure in one HDD, perform the following procedure.
To recover from the backup HDD, see 10.5.2 Recovery by using a backup HDD.
(1) Rebuilding with the OS running
NOTE
• This equipment can change the load on HDDs when writing data, which is applied to the system during
rebuilding. When changing these settings, consider the effect on system operations during rebuilding. The
default setting is HIGH, which enables the rebuilding process with a high load. Specifying a lower writing load
requires more time for rebuilding. The following are guidelines for the rebuilding time required for a 1 TB HDD
with no load.
When the load is set to HIGH: 3 hours
When the load is set to MIDDLE: 13 hours and 30 minutes
When the load is set to LOW: 30 hours
• The default setting allows rebuilding to start automatically when an HDD is replaced. If you want to manually
start rebuilding, change the setting in advance before starting work.
For details about changing the default settings, see 5.3 RAID Configuration Control Command (raidctrl) (B Model
Only) in the HF-W2000 Model 58/55/50 RAS FEATURES MANUAL (WIN-63-0098).
NOTICE
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