On 2006-11-24,
tonino.giallombardo@gmail.com wrote:


> I have a problem concerning DAT tape (HP storage works DAT 40) in
> linux. Dmesg says that DAT is found (Sym0 .....model, speed, type,

This being an HP-UX group (not Linux, not HP hardware) I suggest you
ask elsewhere.

You could run your mt command under strace and see what you get
maybe this line among others:
open("/dev/nst0", O_RDONLY|O_LARGEFILE) = -1 ENXIO (No such device or address)

You could think about how your drive is connected, whether you have the
necessary kernel modules and whether you are using the correct device name.
I've used HP travan tapes with Linux (floppy interface and parallel-IDE)
but not recently.

--
Elvis Notargiacomo master AT barefaced DOT cheek
http://www.notatla.org.uk/goen/

The content of modprobe.conf is:

alias eth0 e1000
alias snd-card-0 snd-intel8x0
install snd-intel8x0 /sbin/modprobe --ignore-install snd-intel8x0 &&
/usr/sbin/alsactl restore >/dev/null 2>&1 || :
remove snd-intel8x0 { /usr/sbin/alsactl store >/dev/null 2>&1 || : ; };
/sbin/modprobe -r --ignore-remove snd-intel8x0
alias usb-controller ehci-hcd
alias usb-controller1 uhci-hcd
# Disable direct I/O for st driver
options st try_direct_io=0
alias scsi_hostadapter sym53c8xx



When I type "modinfo st" I read:

author: Kai Makisara
description: SCSI Tape Driver
license: GPL
parmtype: buffer_kbs:int
parm: buffer_kbsefault driver buffer size for fixed block
mode (KB; 32)
parmtype: max_sg_segs:int
parm: max_sg_segs:Maximum number of scatter/gather segments
to use (256)
parmtype: try_direct_io:int
parm: try_direct_io:Try direct I/O between user buffer and
tape drive (1)
parmtype: try_rdio:int
parm: try_rdio:Try direct read i/o when possible
parmtype: try_wdio:int
parm: try_wdio:Try direct write i/o when possible
vermagic: 2.6.11-7.1.CMSsmp SMP 686 REGPARM 4KSTACKS gcc-3.3
depends: scsi_mod
srcversion: 4940B5462EBB554B614894D



I looked for DAT module by typing "modprobe -l|grep sym" and I found
/lib/modules/2.6.11-7.1.CMSsmp/kernel/drivers/scsi/sym53c8xx_2/sym53c8xx.ko.
So I think that DAT module is present. I typed modprobe st, but it
still doesn't work.

Maybe am I forgetting anything?
Thanks for your help.

The content of modprobe.conf is:

alias eth0 e1000
alias snd-card-0 snd-intel8x0
install snd-intel8x0 /sbin/modprobe --ignore-install snd-intel8x0 &&
/usr/sbin/alsactl restore >/dev/null 2>&1 || :
remove snd-intel8x0 { /usr/sbin/alsactl store >/dev/null 2>&1 || : ; };
/sbin/modprobe -r --ignore-remove snd-intel8x0
alias usb-controller ehci-hcd
alias usb-controller1 uhci-hcd
# Disable direct I/O for st driver
options st try_direct_io=0
alias scsi_hostadapter sym53c8xx



When I type "modinfo st" I read:

author: Kai Makisara
description: SCSI Tape Driver
license: GPL
parmtype: buffer_kbs:int
parm: buffer_kbsefault driver buffer size for fixed block
mode (KB; 32)
parmtype: max_sg_segs:int
parm: max_sg_segs:Maximum number of scatter/gather segments
to use (256)
parmtype: try_direct_io:int
parm: try_direct_io:Try direct I/O between user buffer and
tape drive (1)
parmtype: try_rdio:int
parm: try_rdio:Try direct read i/o when possible
parmtype: try_wdio:int
parm: try_wdio:Try direct write i/o when possible
vermagic: 2.6.11-7.1.CMSsmp SMP 686 REGPARM 4KSTACKS gcc-3.3
depends: scsi_mod
srcversion: 4940B5462EBB554B614894D



I looked for DAT module by typing "modprobe -l|grep sym" and I found
/lib/modules/2.6.11-7.1.CMSsmp/kernel/drivers/scsi/sym53c8xx_2/sym53c8xx.ko.
So I think that DAT module is present. I typed modprobe st, but it
still doesn't work.

Maybe am I forgetting anything?
Thanks for your help.

As pointed out, this is not a linux NG. comp.os.linux...
might be a better place.

Anyways, the device special file could be old/wrong
(wrong major etc). Rename it to something else and
try recreating the DSF (using MAKEDEV etc).

--vishwas