I have two VMs, one SQL server (we just started to use) and one exchange server with a few 100 GB.
The SQL has one os disk and one 1,9TB data disk.

The Exchange server has one os disk, and two 1,9TB data diks (1 for mailboxes and one for public folders)

Both jobs runs fine. When i look at the job for the SQL server it looks like the number of read GB's is close the currently used space on the SQL server:

This makes sense
Not even close to all data on both 1,9TB disks on the exhange is used, and still it reads 1,9TB on those disks?...
Disk usage on exchange:

On the 1,9TB exchange disks it seems like Veeam reads all data, but not on the smaller OS disk. (and not on the 1,9TB datadisk on the SQL server)
All disks are Thin provisioned and formated with NTFS.. dont know if that would matter anyway.
Can anyone explain this?