I almost lost all my personal data due to a disk corruption caused by power failure.
I guess the reason of the corruption is that the write back setting of the Mega Raid Card is Write Back with BBU. Meanwhile, the BBU of raid card ran into a low battery state. Thus, the raid card with no time to write the lastest data to the real hard disks.
Some tools maybe work for the recovery of the data.
https://virtualhobbit.com/2016/08/01/recovering-data-from-damaged-vmfs-partitions/ https://manpages.ubuntu.com/manpages/bionic/man8/fsck.vmfs.8.html http://www.vmfsrecover.com/
Or search with keywords:
VMFSis the Virtual Machine File System used in ESXI.
vmfs fsckis the File System Check(fsck) for vmfs.