Backgroud
- FreeNAS 9.10 with 3 iSCSI volumes ( Vol 1 - 2 x 4T as Raid 1, Vol 2 - 1 x 1.5T, Vol 3 - 1 x 1T). VMFS 6 datastore created from those volumes
- 2 x vSphere 6.5 hosts with vCenter Server 6.5
- FreeNAS prompt red alert with above volumes ( Vol 1 - volume status is Degraded, One or more devices has experienced an error resulting in data corruption. Applications may be affected. / Vol 2 - volume status is online , One or more devices has experienced an error resulting in data corruption. Applications may be affected.)
- Some of the Windows vm when migrating from Vol 1 to Vol 2, it will prompt error caused by file vm_name.vmdk. some Windows & Linux vm can be migrated from Vol 1 to Vol 3 without any problem. For those affected vms when performing backup via Veeam 9.5, there is CRC and read failure error. For those unaffected one, there is no problem on Veeam backup.
- How to troubleshoot the red alert message from FreeNAS? I suspect it has something to do with the storage vmotion error
- run smartctl -a on those FreeNAS disks, didn't see error message.