IBM DCS3860, Installation, User'S, And Maintenance Manual

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16. Complete any remaining Recovery Guru procedures.
17.
If any amber LEDs are lit on any of the components of the storage system,
click
Recovery Guru in the Subsystem Management window toolbar and
complete the recovery procedure. If a problem is still indicated, contact your
IBM technical-support representative.
18. If the status of each component is 'Optimal', create, save, and print a new
storage system profile.
Replacing a memory cache battery
The controller in the DCS3860 storage system contains a rechargeable battery
backup unit that provides power to back up the cache memory onto flash memory
in case power supply fails. Each battery unit contains a sealed, rechargeable
SMART lithium ion battery. The cache battery is the only replaceable battery in the
storage system.
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 as a result of 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 the safety information in the prolog of this document.
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:
v
Use the IBM DS Storage Manager to print a storage system profile.
v
Read the "Safety" section of this document.
v
Ensure that you wear an anti-static wrist strap.
Complete the following steps to replace a battery unit:
1. Locate the controller that contains the failed battery unit.
2. Remove the controller from the chassis.
Chapter 5. Replacing components
103