SCSI Tape/Library Problem

[Andrew Mathews]

Brett I. Holcomb wrote:
> On Tue, 14 Jan 2003 10:29:05 -0700
> Andrew Mathews <andrew_mathews at linux-works.org> wrote:
> 
> This is a devfs system and st does not exist.  If I trace the /proc/scsi/scsi output back using the host luns and targets it goes to sg1.  devfs sees it as sg.
> 
> The tape is id 0 on the card, the changer id 1 according to the card's output when it boots and that matches the scsi output (host 1, id 0 and 1).
> 
> lr-xr-xr-x    1 root     root           36 Jan 14 10:01 /dev/sg1 -> scsi/host1/bus0/target0/lun0/generic
> 
> /dev/sg:
> total 0
> lr-xr-xr-x    1 root     root           39 Jan 14 10:01 c0b0t0u0 -> ../scsi/host0/bus0/target0/lun0/generic
> lr-xr-xr-x    1 root     root           39 Jan 14 10:01 c1b0t0u0 -> ../scsi/host1/bus0/target0/lun0/generic
> lr-xr-xr-x    1 root     root           39 Jan 14 10:01 c1b0t1u0 -> ../scsi/host1/bus0/target1/lun0/generic
> lr-xr-xr-x    1 root     root           39 Jan 14 10:01 c1b0t4u0 -> ../scsi/host1/bus0/target4/lun0/generic
> 
> 
<snip>

Well, while I don't know about devfs, I do know that the changer and the 
drive are not the same device name. How could you tell the changer 
device to rewind, or the drive to move the tape to a different slot? 
There *has* to be a device name for the drive, even if it's sg1, sg2, 
etc. A changer does not use the same commands as a drive, or vice versa, 
and sg* is the standard device naming convention for a changer.

-- 
Andrew Mathews
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