No worry, this is useful information I don't know if you saw that discussion about the lin tape https://github.com/bareos/bareos/discussions/2186#discussioncomment-12262004
If you are willing to test it, it might become supported ;-) I believe I will give the tapestat 1 a try and maybe add some information in the tape chapter documentation. Of course a community PR might accelerate the doc inclusion :-) On Thursday, 22 January 2026 at 16:20:52 UTC+1 Brock Palen wrote: > Sorry to interject Bruno this might be useful for that github thread at > least for my SAS attached drives (does not work with ibm lintape which is > less common) > > tapestat 1 > > Will print the read/write performance of your drives each second. Useful > to see what the drive performance is ‘at that exact moment’ as Baroes does > report total time (effective speed), which might including spooling, > catalogs updates etc. > > sg_logs -a /dev/sgX > > Where X is the scsi generic device number from lsscsi -g > > This gives a lot of details about your drive and the currently mounted > media, such as errors, compression ratios etc. > I find much of the data impenetrable but it was useful for confirming > behavior. > > > Brock Palen > [email protected] > www.mlds-networks.com > Websites, Linux, Hosting, Joomla, Consulting > > > > > On Jan 22, 2026, at 9:25 AM, Bruno Friedmann (bruno-at-bareos) < > [email protected]> wrote: > > > > There's a number of factor that can greatly affect speed: > > > > In fileset the choice of Signature Algorithm is curcial, we recommend to > use xxh128 being far most quicker than md5 > > having any compression done by the FD will also greatly influence the > speed of transfert. > > > > Of course having tuned PG correctly and not using the default 131MB of > share memory will help increasing the needed time to insert file record in > the db. > > etc etc... > > > > On Thursday, 22 January 2026 at 15:18:03 UTC+1 Patrick Winter wrote: > > Hi Bruno, > > > > I actually missed this setting, and tried setting it up with 200G, as we > use LTO-9, and this already increased the speed a lot. > > so i will keep experimenting like this, to bring the best performance > possible. Thank you very much! > > > > Bruno Friedmann (bruno-at-bareos) schrieb am Mittwoch, 21. Januar 2026 > um 14:36:28 UTC+1: > > 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/bb690c37-cb2a-480c-88c2-743045f9e614n%40googlegroups.com > . > > > -- 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/5a943df3-60da-4ed1-8e8a-2f460624ec8fn%40googlegroups.com.
