We've an ESXi 6 server ( Build 2039750 ) that was running fine for months. It uses an LSI Megaraid RAID card with 8 SSDs + Battery in RAID 10. The RAID controller reports no issue and we didn't had any power failures.
Some of the VMs stopped responding today and, after trying several things to stop/restart them, nothing worked. in SSH i'm getting some input/output errors in specific folders:
[root@localhost:/vmfs/volumes] ls
ls: ./c024ed7a-8e112696-2ae9-b4a955c7694f: Input/output error
But as i already mentioned, our RAID setup is fine.
Is there anything that we do to fix this issue? Maybe some kind of fsck in ESXi?
Would upgrading to a newer version help?