Re: SCSI Tape/Library Problem

[Andrew Mathews]

Brett I. Holcomb wrote:

On Tue, 14 Jan 2003 10:29:05 -0700
Andrew Mathews <[EMAIL PROTECTED]> 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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