HP A9890A Smart Array 6400 Series Controllers User Guide - Page 43

Replacing hard drives, Factors to consider before replacing hard drives

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Replacing, moving, or adding hard drives 43 3. Replace any failed drives. 4. After you have replaced the failed drives, fault tolerance may again be compromised. If so, cycle the power again. If the 1779 POST message is displayed: a. Press the F2 key to re-enable the logical drives. b. Recreate the partitions. c. Restore all data from backup. To minimize the risk of data loss that is caused by compromised fault tolerance, make frequent backups of all logical volumes. Replacing hard drives The most common reason for replacing a hard drive is that it has failed. However, another reason is to gradually increase the storage capacity of the entire system ("Upgrading hard drive capacity" on page 46). If you insert a hot-pluggable drive into a drive bay while the system power is on, all disk activity in the array pauses while the new drive is spinning up. This spinup process usually lasts for approximately 20 seconds. When the drive has achieved its normal spin rate, data recovery to the replacement drive begins automatically (as indicated by the blinking Online LED on the replacement drive) if the array is in a fault-tolerant configuration. If you replace a drive belonging to a fault-tolerant configuration while the system power is off, a POST message is displayed when the system is next powered up. This message prompts you to press the F1 key to start automatic data recovery. If you do not enable automatic data recovery, the logical volume remains in a ready-to-recover condition and the same POST message is displayed whenever the system is restarted. Factors to consider before replacing hard drives • In systems that use external data storage, be sure that the server is the first unit to be powered down and the last to be powered back up. Taking this precaution ensures that the system does not erroneously mark the drives as failed when the server is powered up.

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Replacing, moving, or adding hard drives
43
3.
Replace any failed drives.
4.
After you have replaced the failed drives, fault tolerance may again be
compromised. If so, cycle the power again. If the 1779 POST message is
displayed:
a.
Press the
F2
key to re-enable the logical drives.
b. Recreate the partitions.
c.
Restore all data from backup.
To minimize the risk of data loss that is caused by compromised fault tolerance,
make frequent backups of all logical volumes.
Replacing hard drives
The most common reason for replacing a hard drive is that it has failed.
However, another reason is to gradually increase the storage capacity of the
entire system ("Upgrading hard drive capacity" on page
46
).
If you insert a hot-pluggable drive into a drive bay while the system power is on,
all disk activity in the array pauses while the new drive is spinning up. This spin-
up process usually lasts for approximately 20 seconds. When the drive has
achieved its normal spin rate, data recovery to the replacement drive begins
automatically (as indicated by the blinking Online LED on the replacement
drive) if the array is in a fault-tolerant configuration.
If you replace a drive belonging to a fault-tolerant configuration while the system
power is off, a POST message is displayed when the system is next powered up.
This message prompts you to press the
F1
key to start automatic data recovery. If
you do not enable automatic data recovery, the logical volume remains in a
ready-to-recover condition and the same POST message is displayed whenever
the system is restarted.
Factors to consider before replacing hard drives
•
In systems that use external data storage, be sure that the server is the first
unit to be powered down and the last to be powered back up. Taking this
precaution ensures that the system does not erroneously mark the drives as
failed when the server is powered up.