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The calculation of required disk space for performing the backup is wrong when excluding disks, meaningless whether they are excluded by default (e.g. independent disks) or explicitly (by specifying exclusions in the backup options).
For example, I read the following output in my backup scenario:
Available space in backup volume: 13376550502400 (12.46 TB)
/!\ Not enough space to backup server: avail 12.46 TB | required 40.69 TB
On the other side, despite the alleged lack of free disk space, my backup succeeds, as the so-called required disk space does not exclude the size of the excluded disks.
Would you please adapt this behavior? Thank you very much.
Yes, this is a limitation, we'll address this in future versions.