How to Remove and Replace a Sun Storage 3510/3511 FC Array Battery

Tuesday, December 6, 2011 at 4:29 AM | Posted by Elumalai M
PROBLEM OVERVIEW
Defective Battery
WHAT STATE SHOULD THE SYSTEM BE IN TO BE READY TO PERFORM THE RESOLUTION ACTIVITY?
Write cache should be disabled prior to replacing battery to prevent data loss if power event occurs before replacement battery is charged

WHAT ACTION DOES THE CUSTOMER NEED TO TAKE
Check for amber LED on battery, check CLI battery status and location (upper or lower slot). From SC CLI: sccli> show battery
Prepare array for battery replacement
1. To determine status of write cache on array, access array Main Menu from telnet.

2. Select appropriate mode and press

3. Clear any pop-up messages with + < C> Select Disable pop-ups On upper right of Main Menu, Cache Status is displayed. Value to right indicates percentage of controller cache that differs from what is saved to disk. “Clean” means all cache has been saved to disk.

4. From telnet Main Menu, Disable cache: a. Select View and edit Configuration parameters b. Select Caching Parameters . Note cache state (enabled or disabled). c. Select Write-Back Cache Enable ? > No d. Disable Write-back cache? >YesFrom sccli, Disable Cache: e. sccli -o (out-of-band) or sccli /dev/dsk/c#t#d#s2(in-band) f. Check cache parameters. From sccli> show cache-parameters g. Disable cache. sccli> set cache-parameters write-through

5. Verify write-through cache status. sccli> show cache-parameters
Note: Verify "cache" status led on Raid controller is off

6. Remove ethernet and serial cable from battery module

7. Unscrew and disengage thumbscrews and cables on battery module and use thumbscrews to pull out the battery module

8. Insert new battery module and tighten thumbscrews until finger tightWARNING: Do not force or apply excessive pressure when inserting battery module

9. Re-attach cables

10. Using CLI (sccli), check battery status and set in service datesccli> show battery-statussccli> show battery-status -usccli> show battery-status
If second battery needs to be replaced, repeat steps 6-10

11. Confirm controller redundancy. sccli >show redundancy

12. Restore write cache to original settings. To Enable Write-Back Cache a. Select View and edit Configuration parameters b. Select Caching Parameters c. Select Write-Back Cache Disabled d. Enable Write-Back Cache?--> YESsccli> set cache-parameters write-back
Note:Write cache will enable once battery can protect on-board cache. Verify battery is charging by blinking green light on battery. Battery status LED may remain amber for up to 30 minutes.

13. Verify host access

14. Restart Configuration Services agent to prevent expired battery related messages from recurring. From host, type/etc/init.d/ssagent stop/etc/init.d/ssagent start

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