Re: HP 4P problems

Wolfgang Jung (woju@keep.in-berlin.de)
Fri, 19 Sep 1997 22:03:39 +0200

On Fri, Sep 19, 1997 at 08:16:00PM +0300, Petri Lehtonen wrote:
> >> >Is your link /dev/scanner to /dev/sg? correct set ?
> >>
> >> Yes, and I've even tried to use all the /dev/sg* because I was desperate.
> >
> >Really, the "scsi_open: no such device or address" means otherwise.
>
> Actually now that I double checked it was linked from as the ID of the scanner
> is 5 the device is /dev/sgf. But using that device gives me still the same
> error.
>
> Could the device files have incorrect major number, mine is as follows.
>
> crw-rw---- 1 root scanner 21, 5 Feb 12 1996 /dev/sgf
>
> SCSI-HOWTO says that generic SCSI devices have major number 21. I am not sure if
> scanners are generic SCSI devices, as I couldn't find anything on them from the
> SCSI-HOWTO.
>
> Now I noticed running scanimage on virtual terminal that there was a message say
> ing:
>
> Detected scsi general sga at scsi0, channel 0, id 5, lun 0

If you knoe Linux, you actually should have noticed that loading modules
results in loading messages (like this messages finding an device,
since most distributions use teh modular sg driber.

>
> This didn't show up when I run it on xterm, and still doesn't. I wonder why it
> says sga and id5 shouldn't sga be id 0 and id5 be sgf. This seems strange to me.
>
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