Last week VMware released the ESXi 6.0 Patch 3 for the ESXi hosts. There have been a lot of issues that have been fixed with this patch.
You can find more about the issue here.
But the most prominent was the one that had a bug from Express Patch 6 that broke the CBT.
If you were using a backup solution to take snapshots of your VMs in the infrastructure, chances are you will be affected by the Express Patch 6.
If you were running Windows 2008 and later machines, the backup would end up as a full backup instead of the incremental backup.
The reason was behind this was the CBT API call QueryDiskChangedAreas() returned all sectors, which results in a full backup.
When backup applications do incremental backups, they query the changed blocks from the last backup using the API call QueryDiskChangedAreas().
There were a couple of workarounds provided at the time:
- Disable application-consistent quiescing.
- Rollback the ESXi host to version 6.0 U2.
Another important fix is the error message that you would see on ESXi 6.0 hosts similar to when you upgrade from VMFS3 to VMFS5 datastores.
"Deprecated VMFS volume(s) found on the host. Please consider upgrading volume(s) to the latest version"
The workaround was to restart the management agents until now, but that has been resolved with ESXi 6.0 Patch 3.release.
For more information about the issues resolved with this release, kindly follow below the below URL.
