Clear Change Block Tracking Index of VM

I have backup software that uses CBT but I have recently clear all the backups and started with a new target. What happens is the software does not realize it should backup the whole machine the first time because it is still reading the CBT and only backing up the blocks that have changed.

Is there a way to reset the CBT on a VM back to 0 or whatever?
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RickEpnetAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)Connect With a Mentor VMware and Virtualization ConsultantCommented:
Yes, there is.

Firslty you must disable and then re-enable it.

See here, and delete the vmname-ctk.vmdk (ctk files) (or safer just rename)

kb.vmware.com/kb/1020128
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
it's the CTK file which tracks the blocks.
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RickEpnetAuthor Commented:
hanccocka thanks. looks like that may be correct I will run some tests and if everything checks out ok I will award the point.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Thanks, that's how we enable and disable!

We've also got tools that track the data changes! But we've not documented them for general release. Some day, when we get time. So you can check how much the VM is changing on a daily basis in MBs and GBs.
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