QueryChangedDiskAreas API returns incorrect sectors after extending virtual machine VMDK file with Changed Block Tracking (CBT) enabled in ESXi 8.0u2
Article ID: 313038
Updated On:
Products
VMware vSphere ESXi
Issue/Introduction
Symptoms:
CBT's QueryChangedDiskAreas may lose some data changed on the disk after disk is hot-extended.
It happens on ESXi 8.0u2 and VMC 1.24.1
CBT's QueryChangedDiskAreas may lose some data changed on the disk after disk is hot-extended.
It happens on ESXi 8.0u2 and VMC 1.24.1
Environment
VMware vSphere ESXi 8.0.2
Cause
There is a bug in the QueryChangedDisk Areas API
Resolution
In order to resolve this issue, update to ESXi 8.0 Update 2b or newer.
Workaround:
1. Reset CBT after disk is hot-extended. Then, user need to take a full backup immediately.
It does not fix existing backups, but it makes sure the new ones are good. Follow these steps to reset CBT https://kb.vmware.com/s/article/2139574?lang=en_US
2. Or, user extend disk in offline.
Workaround:
1. Reset CBT after disk is hot-extended. Then, user need to take a full backup immediately.
It does not fix existing backups, but it makes sure the new ones are good. Follow these steps to reset CBT https://kb.vmware.com/s/article/2139574?lang=en_US
2. Or, user extend disk in offline.
Feedback
Yes
No
Powered by
