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ESXi 6.0 Silent CBT Failure. - Potential Data Loss
Description
ESXi 6.0 Silent CBT Failure. - Potential Data Loss
There is a fault in the ESXi 6.0.x server which could provide incomplete CBT information for incremental backups.
The result is that any restored data can not be guaranteed to be correct. There is no way for the NetVault VMware plugin (or any backup product) to check that the faulty data is being sent back.
When running virtual machine backups which utilize Changed Block Tracking (CBT) in ESXi 6.0, you experience these symptoms:
The CBT API call QueryDiskChangedAreas() API call can sometimes return incorrect changed sectors, which results in inconsistent incremental virtual machine backups.
Inconsistent virtual machine backups
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