Debugging CBT backup

[robnicholsonmalt]

Is there any way of debugging exactly which files Veeam is reading during a backup? The daily backup of a 2TB always processes 500GB and takes about 2 hours to run but only transfers a few GB into the repository. It's almost as if CBT isn't working and its re-reading files again. You can't use Resource Monitor as the backup is hidden behind a volume shadow copy.

[HannesK]

Hello,

It's almost as if CBT isn't working and its re-reading files again.

what did Veeam support say? case number?

which files Veeam is reading

none The software backs up blocks. That's why it's called "change block tracking". The job log should show whether CBT is used or not. One should see [CBT] in one of the messages.

If it's slow, please contact support. It makes no sense to explain that type of troubleshooting on a forum.

Best regards,
Hannes

[robnicholsonmalt]

>what did Veeam support say? case number?

I use the community edition myself as I'm a lone support engineer. Veeam support have always closed my cases saying "too busy" so I've given up.

[robnicholsonmalt]

>It makes no sense to explain that type of troubleshooting on a forum.

Sorry I don't understand this. Asking whether CBT is logged (which is NOT a support question but a "how to") seems a perfectly good question for a public forum.

[robnicholsonmalt]

>One should see [CBT] in one of the messages.

CBT is being used as that's reported in the job report just seems to be reading more than you'd expect. I'll have a look at the underlying logs.

[HannesK]

Hello,
yes, chances to get support are low for community edition users. For server edition, there would also be a Veeam CBT driver, which might be faster. But that's irrelevant then here.

Logs are in c:\programdata\veeam\endpoint - feel free to dive into it.

Best regards,
Hannes

[robnicholsonmalt]

A couple of my clients do license Veeam so I guess I could be naughty and raise a case that way I'm a bit supporter of Veeam just use the community edition personally as there is just me.