[KLUG Members] ide-scsi with SuSE 8.2, now with some actual hardware questions

[Peter Buxton]

On Wed, Oct 22, 2003 at 03:41:34PM -0400, Greg Mason was only escaped
   alone to tell thee:

> I then had to make sure that /dev/dvd and /dev/cdrecorder pointed to
> their respective drives, /dev/sr1 (my old burner) wasn't being mounted
> with /dev/cdrecorder, and /dev/dvd didn't work.

ATA and SCSI use different device numbers:

brw-rw----    1 root     cdrom     11,   0 Mar 14  2002 /dev/scd0
brw-rw----    1 root     cdrom     11,   1 Mar 14  2002 /dev/scd1
brw-rw----    1 root     cdrom      3,   0 Mar 14  2002 /dev/hda

Adding a CD/DVD from the ATA bus to the SCSI bus changes the order of
the SCSI devices.

What do you mean by "/dev/sr1 wasn't being mounted with
/dev/cdrecorder"?

> my only prob is that I can't seem to get it to burn faster than 20x
> when it's duplicating a cd. (from a drive that can read at 32x, and
> the drives are on different controllers.) the hdc is on my mobo's
> secondary controller, hdg is on a PCI card controller. Should the two
> optical drives be master-slave?
 
If anything, I think mounting them on a single bus would degrade
performance.

If the one drive is reading at 32x, then the writer writes at that speed
minus any overhead. I think reading, pausing, reading from a CD is more
inefficient than from a HD. This is speculation on my part, as I've not
burned directly from a CD, but only from ISOs on a HD.

-- 
He had a mind like Aristotle and a form like mortal
sin. -- Eleanor of Aquitaine, _The Lion in Winter_