Did you ever check and adjust the Maximum File Size parameter https://docs.bareos.org/Configuration/StorageDaemon.html#config-Sd_Device_MaximumFileSize
it should be at least bigger than the buffer of your drive MaximumFileSize = 100GB There's also an ongoing discussion about performance and how to measure it correctly https://github.com/bareos/bareos/discussions/2497 On Wednesday, 21 January 2026 at 13:03:49 UTC+1 Patrick Winter wrote: > Hello, > > I have a LTO - Tape system with 3 drives. > the tapes are able to write with 280mb/s, which i can verify. > i tested this with a dataset of 500gb of small files, and another test > with 1 single 200gb file. (from the same, and a different server, to be > sure the network connection doesnt bottle neck.) > > Also with rsync i get the same speed (around 250-280mb/s) > > both filesets (the 500gb of small files, and the single 200gb file) are > backuped with bareos, with only 100-120 mb/s > > I already tried to set maximum_block_size to 1M, as i found some hints > that this could help. > > my current device configuration looks like this: > > Device { > Name = Drive-0 > DriveIndex = 0 > MediaType = LTO > ArchiveDevice = /dev/nst1 > AutomaticMount = yes > RemovableMedia = yes > RandomAccess = no > Autochanger = yes > Maximum Changer Wait = 600 > Maximum Open Wait = 600 > Maximum Block Size = 1048576 > } > > bareos-dir --version > 25.0.2~pre13.add249aa9 > > > > Any tips or recommendations are very welcomed. > > best regards > Patrick > > -- You received this message because you are subscribed to the Google Groups "bareos-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/bareos-users/a912657b-7db0-4cc2-bb32-804398865877n%40googlegroups.com.
