[TriLUG] any clues?

Vestal, Roy L. rvestal at rti.org
Mon Nov 26 16:38:14 EST 2001


FYI...I'm getting the writer info from the phillips part number in the
/proc/devices. I'm then going on my experience with multiple ide cdroms and
writers in one box.

My box doesn't say they are scsi's in the dmesg either. It points to them
being ATAPI devices.

-----Original Message-----
From: rpjday [mailto:rpjday at mindspring.com]
Sent: Monday, November 26, 2001 4:12 PM
To: 'trilug at trilug.org'
Subject: RE: [TriLUG] any clues?


On Mon, 26 Nov 2001, Vestal, Roy L. wrote:

> In my experience, Most Linux distro's setup CD/DVD Writers as SCSI
devices.

if you look at the dmesg output, it appears that the drive is *not*
a writer.  can anyone verify if a regular CD-ROM ATAPI drive would 
get scsi emulation?  or a dvd drive?  even if they're not writers.

> I've had to compile SCSI Generic support in my kernel's to get it to work
> correctly. ATAPI devices are simply IDE CD devices, readers and writers. I
> believe the model he's referring to, Phillips PCRW804 is an IDE 8x4x32x
> Write/Rewrite/Read drive. It sounds as if he cannot get his writer working
> and doesn't understand why the distro set up /dev/cdrom as a soft link to
> /dev/scd0. I bet if he'd verify his /etc/fstab, he'd find the problem
there.

again, that unit doesn't appear to be a writer, but the problem may very
well be the same.

> "with checking with the book. the ls -l /dev/cdrom comes up with
/dev/cdrom
> -
> /dev/scd0. the cat /proc/devices has ide0 and ide1. dmeg | more has an
> hda
> and hdc pcrw804 atapi cd/dvd rom drive scsi subsys driver rev:1.00 and
> scsi0: scsi hostadapter emulation ide atapi devices. vendor phillips model
> pcrw804 rev: 2,1 and type: cd-rom ansi scsi rev: 02. mount /dev/cdrom
> /mnt/cdrom I get unknown devise. the cat /proc/filesystems has iso9660
> listed and the cdrom installed is set to master. thank you let me know hot
> to fix if possible."

once again, i'd take a shot at "cdrecord -scanbus" to see what he
comes up with.

rday

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