1797 Drive array - array accelerator data backup previously failed

[eddUG]

DL360e gen8, Dynamic smart array B320i RAID controller, ACU diagnostics report indicates 'cache is permanently disabled' error.
Boot-time prompts indicate '1797 Drive array - array accelerator data backup previously failed - array accelerator is disabled'. Kindly any ways to fix this?

[Shwetha3]

Hello eddUG,

Check the cache disable code on the ADU report, if it shows back up failed or charge failed then it could be smart battery failure. 

A healthy cache and battery will look like below on the log 

Cache Disable Code 0x0000
Total Cache Memory Size 1 GiB (0x0718)
Battery Count 1 (0x0001)
Battery Status 0x0001
Parity Read Errors 0 (0x0000)
Parity Write Errors 0 (0x0000)
Error Log All Zeroes (160 x [0x00])
Failed Batteries 0 (0x0000)

[eddUG]

I attempted a couple of prospective solutions that including manually re-enabling the write cache and replacing the battery/capacitor. These seem to have cleared the error code both on the ACU report and boot-time prompts.

Problem is now logical drivers can't be seen by the O.S, windows server 2012. O.S fails to load and drives can't be found.