Hi, Ii it possible that OS was always defaulting to 512 and Bareos before 23.0 was just ignoring the setting. I have a hard time explaining what happened, other than "mt -f /dev/nst0 defblksize 0" fixed the problem.
I check my Bareos configuration for the last 2 years ( I keep it versioned in git ) and I've never set a default block size, so I know I didn't change anything in Bareos. I'm running Debian Bullseye (11). My SAS controller is a Broadcom / LSI SAS2008 PCI-Express Fusion-MPT SAS-2, most likely a Dell Perc H200 controller that I flashed to IT mode. The tape drive is a Quantum Ultrium 5 SAS Internal Half Height. Hopefully this helps, Alex On Tuesday, July 16, 2024 at 4:06:57 AM UTC-4 Andreas Rogge wrote: > Am 15.07.24 um 20:56 schrieb Alan Brown: > > > > _ALL_ LTO drives (even LTO-1) can handle block sizes of at least 1MB and > > you would need to be running a pretty awful (5-10MB/s) scsi adaptor for > > a restriction there > > You wish! > > After changing the default block size to 1 MB we have seen more than one > large enterprise setup that could not handle 1 MB blocks. > The drives were fine, the controllers were fine, but some intermediate > component (*cough* FC director *cough*) didn't allow the large SCSI > frames to pass. > > Also, there are people attaching their drives to the external > SAS-interface of (rather cheap) RAID controllers. Some of these don't > allow block sizes of 1 MB either. > > Best Regards, > Andreas > > -- > Andreas Rogge [email protected] > Bareos GmbH & Co. KG Phone: +49 221-630693-86 <+49%20221%2063069386> > http://www.bareos.com > > Sitz der Gesellschaft: Köln | Amtsgericht Köln: HRA 29646 > Komplementär: Bareos Verwaltungs-GmbH > Geschäftsführer: Stephan Dühr, Jörg Steffens, Philipp Storz > -- 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 on the web visit https://groups.google.com/d/msgid/bareos-users/548c15eb-894e-4119-8a93-abd807dee7f2n%40googlegroups.com.
