Failed HPE Smart Array P408i-a SR Gen10

[EMK1]

Hello Guys,

We have a failure in one of our DL380 Gen 10 servers.

Here’s a detailed order of things that happen that led to this error:

• A waring appeared on disk 3 (3rd disk of the 8 total disks available)
  Note:
  Disks 1 & 2 are used for OS (RAID 1)
  Disks 3 till 8 are used for data (RAID5)
• Once the warning on disk 3 appeared, the performance of the VMs using those disks was hugely affected. We couldn’t even open RDP sessions.
• We restored the latest VM backups to the second Hyper-V host to resume our business operation
• Replaced the defective drive 3, but the rebuild process was extremely slow as well (almost 2 hours to complete around 1%)
• During that time, I went through the ILO Information tab > Overview > Generate NMI
• After this step, the controller displayed the following error in the HPE SSA:
  
• And both logical drives OS & Data were no longer accessible with the following Warning:
  Warning: Logical drive status: The logical drive is not yet available.

Here's a link to the SSA Disgnostic report if it helps:
https://mega.nz/file/pipTADAZ#V5rqftX55tm2PCCP_ScXMP0SxYrsNijRn09l2-k3iUo

Of course, I can format the server but is there any smarter/faster way to recover from this failure?

And most importantly what caused the performance to be extremely slow while one disk failed in the RAID5 configuration?

[BPSingh]

Greeting!

The cache is currently shown as temporarily disabled. This issue may be related to the controller or its firmware. 
Please log a support case and include the latest AHS and ADU logs for further investigation.