My client has a Linux samba cluster with around 6 millions files / 4TB on DRBD device. I would like to use Block Level Backup approach to backup this, however client has some doubts if it's safe to use Block Level Backup with DRBD.
Unfortunately I cannot find anything about DRBD in BOL. Personally I can't see why should it be any issue, but because this is a production cluster I would rather ask before shoot.
Has anyone here have been able to succesfuly backup such devices? Any experience to share would be great.