open the Subsystem Management window and place the controller online;
select the offline controller and click Advanced → Recovery → Place controller
online.
21. Verify the state of the LEDs on the newly inserted controller. See “Controller
LEDs” on page 90. You can also use the Subsystem Management window to
identify any new faults. Do any storage subsystems have a fault (Needs
Attention) status?
v Yes: Click Recovery Guru in the Subsystem Management window toolbar,
and complete the recovery procedure. If the problem remains, contact your
IBM technical-support representative.
v No: Go to step 22.
22. Use the Storage Manager software to print a new storage subsystem profile.
23. Check the WWIDs or the MAC addresses of the host ports after replacing the
controller and/or the host port interface adapter. If you need to change any
WWID or MAC address, update the servers or switches in the configuration.
Working with hot-swap drives
This section explains how you can increase the storage subsystem capacity by
adding more drives or by replacing existing drives with ones that have a larger
capacity.
Before you begin, complete the following tasks:
v Read the safety information that begins on page “Safety” on page ix and
“Handling static-sensitive devices” on page 27.
v Ensure that the current system configuration is working correctly.
v Back up all important data before you make changes to data storage devices.
v Ensure that you wear an anti-static wrist strap.
Before you install or remove drives, review the following information:
v Filler panels: A storage subsystem contains filler panels in the unused drive
bays. Before you install new drives, you must remove these filler panels. Save
the filler panels for future use. For proper cooling and EMC protection, each bay
must always contain either a filler panel or a hot-swap drive.
v Drives:
– The DS3500 supports the following drives:
- Up to 12 LFF 3.5–inch 6 Gbps SAS or NL SAS drives (DS3512 and
EXP3512)
- Up to 24 SFF 2.5–inch 6 Gbps SAS, NL SAS, or SSD drives (DS3524 and
EXP3524)
– For optimum performance, never insert a drive into the storage subsystem
without first confirming the drive firmware level. Contact your IBM
technical-support representative for information about supported drive
firmware levels.
– Use of unsupported drives can cause the storage subsystem to fail.
– After you remove a drive, wait 70 seconds before you replace or reseat the
drive to allow the drive to spin down. Failure to do so might cause
unpredictable results.
v Drive labels: A label is provided on the front of each drive. Use this label to
record the location information for each drive before you remove it. Be sure to
keep a record of the drives and their corresponding bays. Also, record the
Chapter 5. Replacing components 121
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