Hi Kai, $ pwd /sys/class/scsi_tape/st1/device $ cat scsi_level 4 Thanks Shane > -----Original Message----- > From: "Kai Mäkisara (Kolumbus)" [mailto:kai.makisara@xxxxxxxxxxx] > Sent: Friday, January 29, 2016 4:04 AM > To: Seymour, Shane M > Cc: Laurence Oberman; Emmanuel Florac; Laurence Oberman; linux- > scsi@xxxxxxxxxxxxxxx > Subject: Re: What partition should the MTMKPART argument specify? Was: > Re: st driver doesn't seem to grok LTO partitioning > > > > On 28.1.2016, at 9.36, Seymour, Shane M <shane.seymour@xxxxxxx> > wrote: > > > > Hi Kai, > > > > With the changes the I get a failure partitioning a HP DAT72 drive (DDS-5): > > > > # ./mt -f /dev/st1 stsetoption debug > > # ./mt -f /dev/st1 stsetoption can-partitions # ./mt -f /dev/st1 > > mkpartition 1000 > > /dev/st1: Input/output error > > > ... > > [ 3976.389605] st 6:0:3:0: [st1] Partition page length is 10 bytes. > > [ 3976.389610] st 6:0:3:0: [st1] PP: max 1, add 0, xdp 0, psum 02, > > pofmetc 0, rec 03, units 00, sizes: 0 65535 [ 3976.389614] st 6:0:3:0: > > [st1] MP: 11 08 01 00 10 03 00 00 00 00 ff ff [ 3976.389618] st > > 6:0:3:0: [st1] psd_cnt 2, max.parts 1, nbr_parts 0 > ^^^^^^^^^ The problem is here > > ... > > Using a slightly older kernel to partition the DAT72 drive works (same 3 > commands as above): > ... > > [ 351.584906] st 6:0:3:0: [st1] Partition page length is 10 bytes. > > [ 351.584908] st 6:0:3:0: [st1] psd_cnt 1, max.parts 1, nbr_parts 0 > > The old driver computes the psd_cnt from the returned page length. The > same applies to the patched driver if the SCSI level of the device < SCSI_3. > This works correctly with my drive that reports SCSI_2. So, the question is: > what SCSI level does your device report? > > Kai -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
