Date: Wed, 20 Jan 1999 14:37:20 +0000 (GMT) From: Ian Pallfreeman <ip@albatross.mcc.ac.uk> To: scsi@FreeBSD.ORG Subject: how can I make my DAT write DDS-2? Message-ID: <199901201437.OAA08090@albatross.mcc.ac.uk>
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My current trash box has a Sony SDT-5000 DAT drive, which pre-CAM was large
enough to backup itself and a couple of other boxes. Post-CAM, it won't. It
seems that it is now insisting on writing DDS format, rather than DDS-2.
With a 120M tape, written in DDS-2 format, I see:
bash# mt -f /dev/rsa0 status
Mode Density Blocksize bpi Compression
Current: X3B5/88-185A variable 61000 DCLZ
---------available modes---------
0: X3B5/88-185A variable 61000 DCLZ
1: X3B5/88-185A variable 61000 DCLZ
2: X3B5/88-185A variable 61000 DCLZ
3: X3B5/88-185A variable 61000 DCLZ
bash# zgrep -i X3B5/88-185A /usr/share/man/man1/mt.1.gz
0x13 3.81 (0.15) 1 2,400 (61,000) DDS CS X3B5/88-185A 5
Seems that even though the tape is definitely DDS-2, I'm only seeing DDS.
Let's try setting the density to what we want:
bash# mt -f /dev/rsa0 den DDS-2
mt: /dev/rsa0: density: Invalid argument
bash# dmesg | tail -3
(sa0:ahc0:0:4:0): MODE SELECT(06). CDB: 15 0 0 0 c 0
(sa0:ahc0:0:4:0): ILLEGAL REQUEST asc:26,0
(sa0:ahc0:0:4:0): Invalid field in parameter list sks:8d,4
In fact, whatever we try setting the density to, it croaks:
bash# mt -f /dev/rsa0 den QIC-150
mt: /dev/rsa0: density: Invalid argument
bash# dmesg | tail -3
(sa0:ahc0:0:4:0): MODE SELECT(06). CDB: 15 0 0 0 c 0
(sa0:ahc0:0:4:0): ILLEGAL REQUEST asc:26,0
(sa0:ahc0:0:4:0): Invalid field in parameter list sks:8c,4
... and the message is the same whatever the density is, except for DDS.
So, if I can, how do I tell this drive to write DDS-2, as it did pre-CAM
without me having to tell it anything?
TIA,
Ian.
<---------->
ahc0: <Adaptec 2940 Ultra SCSI adapter> rev 0x00 int a irq 9 on pci0.19.0
ahc0: aic7880 Single Channel A, SCSI Id=7, 16/255 SCBs
[...]
sa0 at ahc0 bus 0 target 4 lun 0
sa0: <SONY SDT-5000 3.30> Removable Sequential Access SCSI-2 device
sa0: 5.0MB/s transfers (5.0MHz, offset 8)
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