Two Backups using CBT

syko24

There is a lot of inconsistent info regarding using multiple backup products that use CBT. Can anyone confirm whether this causes conflict between the backup sets? I am typically using Veeam Agent for Windows (Free) to backup our servers. I am playing around with Synology's Active Backup for Business because it has the instant VM restore feature. I am concerned that our Exchange is not being backed up correctly. The date modified does not update on the EDB file after a backup happens after running the second backup software. I am not sure if this is due to CBT or just VSS in general.

I have seen that Veeam has a command to reset CBT but the command returns:

 C:\Windows\system32>"C:\Program Files\Veeam\Endpoint Backup\Veeam.EndPoint.Manager.exe" RESETCBT all
 The system cannot find the file specified.
 Error: in [VctInit] at step [1]
 Agent failed to process method {VeeamVolumeCt.ResetTracking}.

scottalanmiller

I can't confirm if they will interact, but having any two CBT systems in play at once is definitely conceptually a bad idea.

syko24

@scottalanmiller - Is there a way to disable/remove CBT in Veeam Agent? I see articles about doing it but the link / feature doesn't exist on my install. I am not sure if this is only meant to be on the paid versions.

https://helpcenter.veeam.com/docs/agentforwindows/userguide/cbt_remove.html?ver=30

scottalanmiller

@syko24 said in Two Backups using CBT:

@scottalanmiller - Is there a way to disable/remove CBT in Veeam Agent? I see articles about doing it but the link / feature doesn't exist on my install. I am not sure if this is only meant to be on the paid versions.

https://helpcenter.veeam.com/docs/agentforwindows/userguide/cbt_remove.html?ver=30

That is to change which CBT Veeam uses, not to disable CBT.

syko24

@scottalanmiller said in Two Backups using CBT:

@syko24 said in Two Backups using CBT:

@scottalanmiller - Is there a way to disable/remove CBT in Veeam Agent? I see articles about doing it but the link / feature doesn't exist on my install. I am not sure if this is only meant to be on the paid versions.

https://helpcenter.veeam.com/docs/agentforwindows/userguide/cbt_remove.html?ver=30

That is to change which CBT Veeam uses, not to disable CBT.

So it looks like the free version uses the Veeam default driver and the paid versions have additional CBT drivers meant for specific types of backups - ex: SQL Server or Exchange???

scottalanmiller

@syko24 said in Two Backups using CBT:

@scottalanmiller said in Two Backups using CBT:

@syko24 said in Two Backups using CBT:

@scottalanmiller - Is there a way to disable/remove CBT in Veeam Agent? I see articles about doing it but the link / feature doesn't exist on my install. I am not sure if this is only meant to be on the paid versions.

https://helpcenter.veeam.com/docs/agentforwindows/userguide/cbt_remove.html?ver=30

That is to change which CBT Veeam uses, not to disable CBT.

So it looks like the free version uses the Veeam default driver and the paid versions have additional CBT drivers meant for specific types of backups - ex: SQL Server or Exchange???

I don't think that those use CBT at all, they don't store in blocks. It's whether Veeam uses the MS CBT driver or their own.

wrx7m

https://helpcenter.veeam.com/docs/agentforwindows/userguide/backup_hiw.html?ver=30

Says it uses Microsoft's VSS

scottalanmiller

@wrx7m said in Two Backups using CBT:

https://helpcenter.veeam.com/docs/agentforwindows/userguide/backup_hiw.html?ver=30
Says it uses Microsoft's VSS

yeah, that is the native CBT provider.