KB1934: Hyper-V Changed Block Tracking Troubleshooting
www.veeam.com › kb1934Sep 30, 2014 · How to manually reset Veeam CBT Should the information above not resolve the issue, changed block tracking can be reset for a Hyper-V cluster by performing the following steps: Right-click on each host in the cluster, select Manage Volumes and then tick the box to " Disable changed block tracking for this host (not recommended) "
KB1113: How to reset VMware Virtual Machine CBT
https://www.veeam.com/kb111328.07.2011 · In Veeam Backup & Replication v8 and newer: CBT data is invalid, failing over to legacy incremental backup. No action is required, next job run should start using CBT again. If CBT data remains invalid, follow KB1113 to perform CBT reset. Usual cause is power loss. The following entries can be seen in the job log: