Le Fri, 25 Dec 2015 17:53:46 +0200 (EET)
Kai Makisara <Kai.Makisara@xxxxxxxxxxx> écrivait:
> The patch uses the scsi level of the device to separate processing.
> The FORMAT MEDIUM command is defined in SCSI-3 and I suppose that no
> current drive is still SCSI-2. In addition to the "sane" changes
> using the method to specify partitions, the patch implements the
> following: if the size is 1, the driver tells the drive to use
> default partitioning for two partitions. For the HP Ultrium this
> should result in partition 0 of 1425 GB and 1 of 37.5 GB. I don't
> know if this is a useful addition.
>
I didn't look much at the code, but here's what's happening when
running "mt -f /dev/st0 mkpartition 1":
Dec 29 17:01:53 shakuhachi kernel: st: Version 20151225, fixed bufsize 32768, s/g segs 256
Dec 29 17:01:53 shakuhachi kernel: st 7:0:0:0: Attached scsi tape st0
Dec 29 17:01:53 shakuhachi kernel: st 7:0:0:0: st0: try direct i/o: yes (alignment 512 B)
Dec 29 17:01:53 shakuhachi kernel: st 7:0:0:0: st0: Block limits 1 - 16777215 bytes.
Dec 29 17:01:53 shakuhachi kernel: st 7:0:0:0: st0: Mode sense. Length 11, medium 0, WBS 10, BLL 8
Dec 29 17:01:53 shakuhachi kernel: st 7:0:0:0: st0: Density 5a, tape length: 0, drv buffer: 1
Dec 29 17:01:53 shakuhachi kernel: st 7:0:0:0: st0: Block size: 0, buffer size: 4096 (1 blocks).
Dec 29 17:02:04 shakuhachi kernel: st 7:0:0:0: st0: Block limits 1 - 16777215 bytes.
Dec 29 17:02:04 shakuhachi kernel: st 7:0:0:0: st0: Mode sense. Length 11, medium 0, WBS 10, BLL 8
Dec 29 17:02:04 shakuhachi kernel: st 7:0:0:0: st0: Density 5a, tape length: 0, drv buffer: 1
Dec 29 17:02:04 shakuhachi kernel: st 7:0:0:0: st0: Block size: 0, buffer size: 4096 (1 blocks).
Dec 29 17:02:04 shakuhachi kernel: st 7:0:0:0: st0: Rewinding tape.
Dec 29 17:03:06 shakuhachi kernel: st 7:0:0:0: st0: Block limits 1 - 16777215 bytes.
Dec 29 17:03:06 shakuhachi kernel: st 7:0:0:0: st0: Mode sense. Length 11, medium 0, WBS 10, BLL 8
Dec 29 17:03:06 shakuhachi kernel: st 7:0:0:0: st0: Density 5a, tape length: 0, drv buffer: 1
Dec 29 17:03:06 shakuhachi kernel: st 7:0:0:0: st0: Block size: 0, buffer size: 4096 (1 blocks).
Dec 29 17:07:20 shakuhachi kernel: st 7:0:0:0: st0: Error: 8000002,cmd: 0 0 0 0 0 0
Note that I've simply patched my plain vanilla 3.18.25 st modules.
There doesn't seem to be any difference with newer (or older) kernels,
anyway.
Do you want me to try anything in particular? Is my mt version OK (v
1.1)?
--
------------------------------------------------------------------------
Emmanuel Florac | Direction technique
| Intellique
| <eflorac@xxxxxxxxxxxxxx>
| +33 1 78 94 84 02
------------------------------------------------------------------------
--
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
