Replacing The E-Ddms One At A Time - IBM System Storage DS5020 Installation, User's, And Maintenance Manual

11. Use the DS Storage Manager software to configure the new E-DDMs. See the
12. Restore the data from backup to all the E-DDMs.

Replacing the E-DDMs one at a time

Use this procedure to replace all the E-DDMs one at a time. You cannot use this
procedure on RAID 0 logical drives (use the procedure in "Replacing all E-DDMs at
the same time" on page 135).
Note: If your storage subsystem has hot spares assigned, you might want to
Attention:
reseating the E-DDM CRU to allow it to properly spin down. Failure to do so might
cause undesired events.
To replace the E-DDMs one at a time, perform the following steps:
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IBM System Storage DS5020 Storage Subsystem: Installation, User's, and Maintenance Guide
v If the Drive activity LED is off, the E-DDM CRU might not be installed
correctly. Remove the E-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
E-DDM might be faulty. See the DS Storage Manager software for problem
determination.
DS Storage Manager software online Help for detailed instructions.
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
E-DDM. The data on the new E-DDM is still rebuilt, but the process takes
longer for each E-DDM. Remember to reassign the hot spares when you are
finished with this procedure.
After you remove an E-DDM CRU, wait 70 seconds before replacing or
1. Read the following information:
v "Replacing multiple E-DDMs" on page 134, particularly the paragraphs that
discuss the differences between the two possible upgrade procedures
v Your software documentation regarding E-DDM upgrades and installation
v The documentation that comes with the new E-DDMs
Read all precautionary notes, kit instructions, and other information. Kit
instructions often contain the most current information regarding the
E-DDMs and their installation, plus upgrade or servicing procedures.
Compare the kit instructions with this procedure to determine if you need to
modify this procedure.
2. Use the DS Storage Manager software to check the status of the unit. Correct
any problems that are reported. Upgrade the storage subsystem controller to
the level that supports the new E-DDMs, if required.
3. Back up the data in the arrays and logical drives that are configured using the
E-DDMs 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 31.
4. Unpack the new E-DDMs.
Set the E-DDMs on a dry, level surface away from magnetic fields. Save the
packing material and documentation in case you need to return the E-DDMs.
5. Use the DS Storage Manager software to make sure that the array that was
defined using these E-DDMs is in optimal (not degraded) state before manually
failing the first E-DDM 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: