In the message dated: Thu, 29 Feb 2024 22:11:48 +0100, The pithy ruminations from Marco Gaiarin on [[External] Re: [Bacula-users] Overland-Tandberg TD-LTO9xSA LTO9HH SAS External Tape Drive Kit] were: => Mandi! Andrea Venturoli => In chel di` si favelave... => => > Anyone using this hardware? => => Here. Work pretty well, clearly 'out of the box', no module/kernel/... => modification or other hacks; but i'm using Linux (PVE6, so debian buster). =>
=> => => I've only a problem now: tape are slow in bacula. Seems not a unit problem; => they have 400MB/s write speed specification, and with btape i can reach => 350MB/s easily. But still on real backup job i cannot go better then => 150-180MB/s. I'm still investigating, but as just stated it is not a unit => trouble... At a guess, that sounds like the tape drive is not being sent data fast enough, causing it to write data, then stop, then need to start again (rewind, come up to speed mechanically, find the correct position on tape) when it gets more data. This is not surprising if you have updated from LTO5 -> LTO9 without significantly changing the spool device and network. To keep that drive saturated with incoming data, the data probably needs to be coming from an SSD device (NVMe preferred), already spooled into large (multi-GB) chunks, not reading individual files from spinning disks. Mark -- Mark Bergman voice: 215-746-4061 mark.berg...@pennmedicine.upenn.edu fax: 215-614-0266 http://www.med.upenn.edu/cbica/ Senior IT Director, Center for Biomedical Image Computing and Analytics Department of Radiology University of Pennsylvania _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
