SCSI Tape/Library Problem

[Brett I. Holcomb]

No, some I've used looked for sg devices.

On Tue, 14 Jan 2003 11:48:59 -0500 (EST)
Net Llama! <netllama at linux-sxs.org> wrote:

> I thought tape jukeboxes required an additional kernel module, like st or
> something like that?
> 
> On Tue, 14 Jan 2003, Brett I. Holcomb wrote:
> 
> > I have a Cybernetics tape library (SCSI) with tape drive (also SCSI).  I'm attempting to test it with simple commands like tar -cvf /dev/tape0 /somedir.  This gives a list of files ,then "write 0 of 1024 blocks, error not recoverable"
> >
> > If i use mt -f /dev/tape0 status I get "operation not permitted).
> >
> > The tape device (see cat /proc/scsi/scsi below) is id 0 on host 1 while the library is ID 1 on host 1.  The /dev/sg1 is linked (by gentoo) to the /scsi device so I created a link /dev/tape0 to /dev/sg1.
> >
> > lr-xr-xr-x    1 root     root           36 Jan 14 10:01 /dev/sg1 ->scsi/host1/bus0/target0/lun0/generic
> >
> > Why does mt tell me the operation is not allowed?  The /scsi entries have the correct permissions.  I'm doing this as root - any ideas?
> > This system is using the devfs file system.
> >
> > For  /dev/scsi/host1/bus0/target0/lun0
> > crwxrwxrwx    1 brett    root      21,   1 Dec 31  1969 generic
> >
> > For /dev/scsi/host1/bus0/target1/lun0
> > crw-rw----    1 brett    root      21,   2 Dec 31  1969 generic
> >
> >
> > Here's /proc/scsi/scsi
> >
> > bash-2.05b$ cat /proc/scsi/scsi
> > Attached devices:
> > Host: scsi0 Channel: 00 Id: 00 Lun: 00
> >   Vendor: ADAPTEC  Model: RAID-5           Rev: 370F
> >   Type:   Direct-Access                    ANSI SCSI revision: 02
> > Host: scsi1 Channel: 00 Id: 00 Lun: 00
> >   Vendor: EXABYTE  Model: Mammoth2         Rev: v04b
> >   Type:   Sequential-Access                ANSI SCSI revision: 02
> > Host: scsi1 Channel: 00 Id: 01 Lun: 00
> >   Vendor: SPECTRA  Model: 215              Rev: 1008
> >   Type:   Medium Changer                   ANSI SCSI revision: 02
> > Host: scsi1 Channel: 00 Id: 04 Lun: 00
> >   Vendor: MATSHITA Model: DVD-RAM LF-D200  Rev: A120
> >   Type:   CD-ROM                           ANSI SCSI revision: 04
> >
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> -- 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Lonni J Friedman				netllama at linux-sxs.org
> Linux Step-by-step & TyGeMo		     http://netllama.ipfox.com