23. Does any component have a Needs Attention status?
v Yes – Click the Recovery Guru toolbar button in the Subsystem
Management Window, and complete the recovery procedure. If the problem
is not resolved, contact your Technical Support representative.
v No – Go to step 24.
24. Remove the anti-static protection.
25. Create, save, and print a new storage subsystem profile.
Replacing a battery
The controller in the storage subsystem contains a rechargeable battery backup unit
that provides power to back up the cache memory onto flash drives in the event of
a power failure. Each battery unit contains a sealed, rechargeable SMART lithium
ion battery. The cache battery is the only replaceable battery in the storage
subsystem.
Use the following procedure if the Storage Manager software instructs you to
replace the battery because the current battery has failed. You can also use the
Storage Manager software to check the status of the battery. Because write-caching
is disabled when the battery fails, replace the failed battery as soon as possible to
minimize any performance impact due to the disabling of the write-caching
function.
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 27.
Attention: To avoid overheating the storage enclosure and causing damage to its
components, replace failed parts within 10 minutes. The Recovery Guru in the
Storage Manager software identifies failed parts.
Do not remove the failed part from the storage enclosure until you:
v Review the replacement procedure for the failed part in this guide.
v Locate screw drivers or any other hand tools that you might need to replace the
failed part.
v Receive the replacement part and are ready to install it in the enclosure.
Before you begin, ensure that you wear an anti-static wrist strap.
To replace a battery unit, complete the following steps:
1. Use the Storage Manager software to print a storage subsystem profile.
2. Read the safety information that begins on page “Safety” on page ix and “Best
practices guidelines” on page 8.
3. Locate the controller that contains the failed battery unit (see “Controller
LEDs” on page 90).
Attention: Before you remove a controller in a single-controller DS3500, shut
down the DS3500 to avoid data loss (see “Turning off the storage subsystem”
on page 95).
4. Remove the controller from the chassis.
148 IBM System Storage DS3500 and EXP3500 Storage Subsystem: Installation, User's, and Maintenance Guide
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