Le Mon, 4 Jan 2016 12:22:34 +0200 (EET)
Kai Makisara <Kai.Makisara@xxxxxxxxxxx> écrivait:
> >In the HP LTFS sources I found an interesting detail: the code does
> >LOAD before unformatting. A comment says that it is in some cases
> >better method to put the position to beginning of partition 0 than
> >other methods. You could try ‘mt load’ before trying to partition.
> >
> Here is again a new version of the patch. This does load before
> partitioning. The code performing default partitioning (FDP=1) has
> also been slightly modified (two more bits of the original mode page
> retained).
You were right, it works by sending a "LOAD" first:
First, not working:
# mt -f /dev/nst0 mkpartition 0
Jan 4 12:02:17 shakuhachi kernel: st 7:0:0:0: st0: Block limits 1 - 16777215 bytes.
Jan 4 12:02:17 shakuhachi kernel: st 7:0:0:0: st0: Mode sense. Length 11, medium 0, WBS 10, BLL 8
Jan 4 12:02:17 shakuhachi kernel: st 7:0:0:0: st0: Density 5a, tape length: 0, drv buffer: 1
Jan 4 12:02:17 shakuhachi kernel: st 7:0:0:0: st0: Block size: 0, buffer size: 4096 (1 blocks).
Jan 4 12:02:17 shakuhachi kernel: st 7:0:0:0: st0: Rewinding tape.
Jan 4 12:02:17 shakuhachi kernel: st 7:0:0:0: st0: Partition page length is 16 bytes.
Jan 4 12:02:17 shakuhachi kernel: st 7:0:0:0: st0: PP: max 3, add 1, xdp 1, psum 03, pofmetc 4, rec 03, units 09, sizes: 2543 38
Jan 4 12:02:17 shakuhachi kernel: st 7:0:0:0: st0: Sending FORMAT MEDIUM
Jan 4 12:02:17 shakuhachi kernel: st 7:0:0:0: st0: Error: 8000002, cmd: 4 0 0 0 0 0
Jan 4 12:02:17 shakuhachi kernel: st0: Sense Key : Illegal Request [current]
Jan 4 12:02:17 shakuhachi kernel: st0: Add. Sense: Position past beginning of medium
Then:
# mt -f /dev/nst0 load
Jan 4 12:02:33 shakuhachi kernel: st 7:0:0:0: st0: Block limits 1 - 16777215 bytes.
Jan 4 12:02:33 shakuhachi kernel: st 7:0:0:0: st0: Mode sense. Length 11, medium 0, WBS 10, BLL 8
Jan 4 12:02:33 shakuhachi kernel: st 7:0:0:0: st0: Density 5a, tape length: 0, drv buffer: 1
Jan 4 12:02:33 shakuhachi kernel: st 7:0:0:0: st0: Block size: 0, buffer size: 4096 (1 blocks).
Jan 4 12:02:33 shakuhachi kernel: st 7:0:0:0: st0: Loading tape.
Jan 4 12:02:33 shakuhachi kernel: st 7:0:0:0: st0: Block limits 1 - 16777215 bytes.
Jan 4 12:02:33 shakuhachi kernel: st 7:0:0:0: st0: Mode sense. Length 11, medium 0, WBS 10, BLL 8
Jan 4 12:02:33 shakuhachi kernel: st 7:0:0:0: st0: Density 5a, tape length: 0, drv buffer: 1
Jan 4 12:02:33 shakuhachi kernel: st 7:0:0:0: st0: Block size: 0, buffer size: 4096 (1 blocks).
# mt -f /dev/nst0 mkpartition 0
Jan 4 12:02:42 shakuhachi kernel: st 7:0:0:0: st0: Block limits 1 - 16777215 bytes.
Jan 4 12:02:42 shakuhachi kernel: st 7:0:0:0: st0: Mode sense. Length 11, medium 0, WBS 10, BLL 8
Jan 4 12:02:42 shakuhachi kernel: st 7:0:0:0: st0: Density 5a, tape length: 0, drv buffer: 1
Jan 4 12:02:42 shakuhachi kernel: st 7:0:0:0: st0: Block size: 0, buffer size: 4096 (1 blocks).
Jan 4 12:02:42 shakuhachi kernel: st 7:0:0:0: st0: Rewinding tape.
Jan 4 12:02:42 shakuhachi kernel: st 7:0:0:0: st0: Partition page length is 16 bytes.
Jan 4 12:02:42 shakuhachi kernel: st 7:0:0:0: st0: PP: max 3, add 1, xdp 1, psum 03, pofmetc 4, rec 03, units 09, sizes: 2543 38
Jan 4 12:02:42 shakuhachi kernel: st 7:0:0:0: st0: Sending FORMAT MEDIUM
# tapeinfo -f /dev/sg6
Product Type: Tape Drive
Vendor ID: 'HP '
Product ID: 'Ultrium 6-SCSI '
Revision: '329U'
Attached Changer API: No
SerialNumber: 'HU1302U4RC'
MinBlock: 1
MaxBlock: 16777215
SCSI ID: 0
SCSI LUN: 0
Ready: yes
BufferedMode: yes
Medium Type: Not Loaded
Density Code: 0x5a
BlockSize: 0
DataCompEnabled: yes
DataCompCapable: yes
DataDeCompEnabled: yes
CompType: 0x1
DeCompType: 0x1
BOP: yes
Block Position: 0
ActivePartition: 0
EarlyWarningSize: 0
NumPartitions: 0
MaxPartitions: 3
--
------------------------------------------------------------------------
Emmanuel Florac | Direction technique
| Intellique
| <eflorac@xxxxxxxxxxxxxx>
| +33 1 78 94 84 02
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