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4. Unpack the new EV-DDMs.
Set the EV-DDMs on a dry, level surface away from magnetic fields. Save the
packing material and documentation in case you need to return them.
5. Use the DS4000 Storage Manager software to ensure that the array that was
defined using these EV-DDMs is in optimal (not degraded) state before
manually failing the first drive you want to replace. If the array is in degraded
state, use the recovery procedures to bring the array into the optimal state.
Make sure of the following:
v You fail only one EV-DDM
v The software status display shows a failed status for the appropriate
EV-DDM
v The amber Drive fault LED (on the front bezel below the drive) is on
Attention:
Removing the wrong EV-DDM can cause data loss. Make sure
that you remove only the failed EV-DDM CRU. The Drive fault LED below the
failed EV-DDM CRU should be on.
If you remove an active EV-DDM accidentally, wait at least 30 seconds and
then reinstall it. Because you failed two EV-DDM in a RAID array, the array
might be marked failed by the controller. This array will not be available to the
host for I/O. See the DS4000 Storage Manager software for further recovery
instructions. Do not attempt to replace any EV-DDMs until the array is brought
back to optimal state.
6. Use the procedures in "Replacing hot-swap EV-DDMs" on page 114 to remove
the failed EV-DDM. Use the procedures in "Installing hot-swap EV-DDMs" on
page 112 to install the new EV-DDMs into the storage subsystem.
The new EV-DDM automatically reconstructs the data after you install it in the
drive slot.
During data reconstruction, the amber Drive fault LED might come on for a few
minutes, then turn off when the green Drive activity LED begins flashing. A
flashing Drive activity LED indicates that data reconstruction is in progress.
Note: If your storage subsystem has active hot spares, data might not start
copying to the new EV-DDM until the data is reconstructed on the hot
spare. This increases the time that is required to complete the
procedure.
7. Check the green Drive activity LED and the amber Drive fault LED above the
new EV-DDM CRUs.
Make sure that the Drive activity LEDs are on and the Drive fault LEDs are off.
Note: The Drive fault LEDs might flash intermittently while the EV-DDMs spin
up.
v If the Drive activity LED is off, the EV-DDM CRU might not be installed
correctly. Remove the EV-DDM CRU, wait 30 seconds, and then reinstall it.
v If the Drive fault LED stays on or the Drive activity LED stays off, the new
EV-DDM might be faulty or might be an uncertified drive. See the DS4000
Storage Manager software for problem determination. In the case of an
uncertified drive, verify that the drive options or drive FRU part number is
correct for your storage subsystem.
8. Use the DS4000 Storage Manager software to monitor the status of the new
EV-DDM and the progress of the data reconstruction. Wait for data
reconstruction to finish (the Drive activity LED stops flashing).
Chapter 5. Replacing components
119
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