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CBT Backups - What happens during the CBT call?

Mauritz Swanepoel


I'm hoping my question is in the right forum. I have been working the last couple of months in incorporating CBT backups for our Citrix Hypervisor fleet. I am currently working on a MVP for our internal system and have a question regarding CBT.


CBT must be enabled for all VDI's. I have noted that we have to enable CBT before we take a VDI snapshots. This makes sense. There is however 1 scenario that I am unable to wrap my head around and that is, what happens when we do a CBT enable call? As example, what are the dangers of running the below during each backup cycle? 



The scenario we have is that the documentation states that if CBT is not enabled (or was previously enabled and now not enabled), this may be seen as a corrupt SR or that the SR crashed. If I run the above line of code whilst returning all VDIs, I will enable CBT regardless which may override the previously found CBT error. In what events will CBT be disabled?

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