Subject: Re: CD-RW drive problems.
To: Richard Rauch <rkr@olib.org>
From: Michal Pasternak <michal@pasternak.w.lub.pl>
List: netbsd-help
Date: 10/07/2003 08:41:55
Richard Rauch [Tue, Oct 07, 2003 at 01:35:17AM -0500]:
> First problem, I found that cdrecord didn't believe that cd2 was
> able to work. It didn't say, as I recall, "device not found," or
> such. It gave the same "not supported" message whether I tried to
> use cd0, cd1, or cd2. (I have a real CD drive and a DVD drive,
> separate from the CD-RW. Don't ask. (^&)
cdrecord is not supposed to work with /dev/ entries; you should do
"cdrecord -scanbus" at the beginning and then, use the 3 numbers (bus,
target, LUN) as a parameter to dev=x,x,x on cdrecord's commandline, eg:
cdrecord dev=15,0,0 -data file.iso
> Eventually, for some reason, it occurred to me to chec /dev/cd*,
> at which point I discovered: I only have cd0 and cd1! No wonder
> it didn't work.
> I have some possible explanations:
>
> * The media is bad (does this happen?). The CD-RW drive seems to have
> a hard time deciding what to do with the media. Maybe the media is
> somehow so badly manufactured that it's not able to be recognized/used?
Did you include "blank=fast" or "blank=all" parameter before burning that
CD-RW?
> The media is old, but has just been sitting in its jewel box in
> a CD tower. It is, of course, unused.
Well, might be broken.
Also, speed setting is important, when burning CD-RWs. Make sure you don't
exceed the maximal burning speed; the safe setting should be about 4x
(speed=4 parameter to cdrecord).
> * The drive needs cleaning (possible). This would explain why the thing
> has a hard time recognizing media (harder than I thought it did in the
> past).
Test it a bit with different CDs (non-RW ones, different brands) before
opening it ;)
> I'm going to try a long shot and power down, disconnect the regular
> CD, and see if being renumbered to cd1 helps the situation. (Given
I still don't understand how did you manage to cdrecord to use /dev/cd*
entries.
--
Michal Pasternak :: http://pasternak.w.lub.pl