Replacing A Dr550 Storage Controller Battery Unit - IBM DR550 Problem Determination And Service Manual

17. If the newly inserted controller is in an offline state, see the DS4000 Storage
18. Verify the state of the LEDs on the newly inserted controller. See the
19. If you also replace the controller cache battery backup unit, reset the battery
20. Use the DS4000 Storage Manager client software to print a new storage

Replacing a DR550 Storage Controller battery unit

Each RAID controller in the DR550 Storage Controller contains a rechargeable
battery unit that maintains data in the cache memory for three days without power
to the unit.
Use the following procedure if the DS4000 Storage Manager for DR550 client
instructs you to replace the battery unit because the current battery has failed. You
can also use the DR550 Storage Controller client to check the status of the battery.
Because write-caching is disabled when either one of the battery units fail, replace
the failed battery unit as soon as possible to minimize any impact due to the
disabling of the write-caching function.
Replace only the battery unit that is indicated as failed by the LEDs. You do not
need to replace both battery units when the Battery LEDs indicate that only one
battery unit has failed.
Note: Unlike the batteries for other DS4000 Storage Subsystems, the DR550 Storage
Attention:
damage from static electricity. For details about handling static-sensitive devices,
see the IBM System Storage DS4200 Storage Subsystem Installation, User's and
Maintenance Guide.
Use the following procedure to replace a battery unit:
1. Use the DS4000 Storage Manager for DR550 client software to print a storage
2. Locate the RAID controller that contains the failed battery unit.
3. Check the LEDs on the battery units to determine which of the two battery
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DR550 Version 4.5 Problem Determination and Service Guide
Manager client online help for instructions on bringing the controller online.
If necessary, open the DS4000 Storage Manager Subsystem Management
window and place the controller online; select the offline controller and click
Advanced > Recovery > Place controller online.
information about checking the LEDs in the IBM System Storage DS4200
Express Storage Subsystem Installation, User's and Maintenance Guide
(GC27-2048). You can also use the DS4000 Storage Manager Storage Manager
client Subsystem Management window to identify any new faults. Do any
storage subsystems have a fault (Needs Attention) status?
v Yes – Select the Recovery Guru toolbar button in the Subsystem
Management window, and complete the recovery procedure. If the problem
persists, contact your IBM service representative.
v No – Go to step 19.
age in the DR550 Storage Controller Subsystem Management window. Refer to
the online help for instructions on how to reset the battery age, if required.
subsystem profile.
Controller battery units do not have set expiration dates. Do not replace
these batteries after a certain usage period.
When you handle static-sensitive devices, take precautions to avoid
subsystem profile.
units has failed. Replace only the battery unit that is indicated as failed by the
LEDs.