Lately, Veeam backup jobs are taking 3 to 4 times longer. Most VMs have this note "CBT data is invalid, failing over to legacy incremental backup." I used their KB1113 article to reset CBT for VMs using PowerShell commands, but "CBT data is invalid" has come back in a few days on some VMs.
What could be causing this? Any permanent solution? BTW, I recently upgraded to VMware 6.0. Thanks.