We have server monitoring in place and are receiving some serious disk errors nightly from the event logs. Running 3 Windows Server VMs (2008 R2 and 2012 R2) on an ESXi host. Errors occur on multiple VMs and seem to be caused by the backup job.
Errors are as follows:
Alert Name : New Technology File System (Ntfs) - The file system structure on disk is corrupt and unusable.
Alert Name : Disk - Device Not Ready for Access.
We have an ESXi 5.5 host running on a Dell PowerEdge R510 with a Xeon E5530 and 32GB RAM. I believe it is a RAID1 array with 2x 1TB 7200rpm near-line SAS drives and a SAS 6/iR controller.
Backups are running nightly and start at 11pm using Veeam 8.0. I'm thinking this might be snapshot related.
Any advice on how to stop these errors?