Hi,
I am having issues with my VMs corrupting every couple of days on an ESXi bare metal setup.
I have about 7 or 8 VMs, one is a domain controller (windows server 2012), and the rest are dedicated workstations for groups of applications (windows 10), and one Linux Ubuntu VM.
I have had the most corruptions on the domain controller, but the others including the Linux machine have almost all corrupted at some point, which usually has resulted in me having to do a fresh install or full VM restore from a weekly backup. By corruptions, I mean the OS tries to start goes into some sort of repair mode, or error mode, etc., and cannot load the OS, even in safe mode.
The VMs are stored on a NAS. The NAS is split up into a iSCSI LUN with Thick Provisioning for my VM datastore, and the rest is just for simple network file storage on a separate volume. The NAS is set up for RAID 5 and also has a scheduled backup every week onto a USB locally attached HDD. The corruptions do not seem to coincide with the backing up of the LUN, they just seem random. The NAS itself I would say is working fine, since there are no faults/errors, and all of my other file storage has had not issues.
Any ideas what could be causing this?