Hi community.

I admin a IBM FlashSystem A9000R 425 and I have this situation: Enclosure 1 has the following status:

A9000>>component_list
Component ID                Status         Currently Functioning   
1:Flash_PSU:1:2             Failed         no                      
1:Flash_PSU:2:1             OK             yes                     
1:Flash_PSU:2:2             OK             yes                     

1:Flash_BBU:1:1             Failed         no                      
1:Flash_BBU:1:2             Initializing   yes                     
1:Flash_BBU:2:1             Initializing   yes                     
1:Flash_BBU:2:2             OK             yes

Our local provider (storage is out of contract) run Technical Assistence Tool Flashsystem to replace disk 1:Flash_BBU:1:2 but procedure need to replace disk 1:Flash_BBU:1:1 in firt place. On Hyperscale A9000 we don't have any alert about cache status.

I think that disk 1:Flash_BBU:1:2 keep the cache services alive on that enclosure. I've checked all documentation available on internet, but I cannot find any article that help me to check cache status.

My questions are:

1.- How can I check the cache service status?

2.- Is any command to disable cache? I think that this task will activate write-through mode and I can change failed disk on the same enclosure that have the other flash_bbu in Failed status.

Many thanks!

As A9K/A9KR are EOS，so I guess you maybe need to pd the issue yourself or ask help from local provider. Here is the cli guide from kc.

https://www.ibm.com/docs/en/STJKN5_12.3.2/pdf/IBM_FlashSystem_A9000R_CLI_12.3.2.e.pdf

For the questions.

1. I remembered there is not cache status on volume level. If data reduction state is online, then the volume is on cache on status.
2. You can disable cache on A9K.

You can upload all of output from component_list,let's see what happened.