Replacing The Drives One At A Time - IBM DS3500 Installation, User & Maintenance Manual

12. Restore the data from backup to all the drives.

Replacing the drives one at a time

Use this procedure to replace all the drives one at a time. You cannot use this
procedure on RAID 0 logical drives (use the procedure in "Replacing all drives at
the same time" on page 110).
Note: If hot spares are assigned in the storage subsystem, you might want to
Attention:
down before you replace or reseat the drive. Failure to do so might cause
unpredictable results.
To replace the drives one at a time, complete the following steps:
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System Storage DS3500 and EXP3500: Installation, User's, and Maintenance Guide
unassign the hot spares while you perform this procedure. If you do not,
reconstruction might start on the hot spare before you insert the new drive.
The data on the new drive is still rebuilt, but the process takes longer for
each drive. Remember to reassign the hot spares when you are finished with
this procedure.
After you remove a drive, wait 70 seconds to allow the drive to spin
1. Read the following information:
v "Replacing multiple drives" on page 108, particularly the paragraphs that
explain the differences between the two possible upgrade procedures
v Your software documentation about drive upgrades and installation
v The documentation that comes with the new drives
Read all precautionary notes, kit instructions, and other information. Kit
instructions often contain the most current information about the drives and
their installation, plus upgrade or servicing procedures. Compare the kit
instructions with this procedure to determine whether you must modify this
procedure.
2. Use the DS Storage Manager software to check the status of the unit. Correct
any problems that are reported.
3. Back up the data in the arrays and logical drives that are configured, using the
drives that you are replacing.
Attention: When you handle static-sensitive devices, take precautions to
avoid damage from static electricity. For details about handling static-sensitive
devices, see "Handling static-sensitive devices" on page 19.
4. Unpack the new drives.
Set the drives on a dry, level surface away from magnetic fields. Save the
packing material and documentation in case you have to return the drives.
5. Use the DS Storage Manager software to make sure that the array that was
defined using these drives is in Optimal (not Degraded) state before you
manually fail the first drive that you want to replace. If the array is in a
Degraded state, use the recovery procedures to bring the array into the
optimal state.
Make sure that:
v You fail only one drive
v The software status display shows a Failed status for the applicable drive
v The amber drive fault LED (on the front bezel below the drive) is lit