William L. Maltby wrote:

It's to bad you couldn't continue the prior thread. Would have been better to have everything in one thread.

OK. I see your point here.

http://lists.centos.org/pipermail/centos/2007-December/091666.html

On Mon, 2007-12-31 at 00:04 -0500, Robert Moskowitz wrote:

...

First the Storix drive works just fine under DSL 4.2.1 on my Libretto.

So the drive is fine, the media is fine. And cdrecord on DSL reports the media to be

Manuf. index: 27 Manufacturee: Prodisc Technology Inc.

I have all of ONE system with Centos 4 on it. A Trixbox 2.2; I added cdrecord and found that I could burn the iso image ONLY by including the -force option to get around the "cdrecord: Cannot get disk type" error.

So I moved back to the Centos 5 system. I had to add the speed=4 (when the unit supports speed=8) along with the -force to get it to burn a iso image (btw, timeout=100 does nothing. The failure is in a few seconds, adding to the timeout changes nothing). There are a number of timing errors on the Centos 5 system. Even the Centos 4 system had a SCSI error (0x7000).

I did find ONE mention of "cdrecord: Cannot get disk type":

http://crashrecovery.org/oss-dvd/Changelog.html

but that is dated 2/2/06. One would think it is fixed in Centos 5.....

I have NOT gotten the HP CDRW working yet, that is the one I want to leave on the server, as the Storix is my traveling drive. More work. Any pointers gladly taken!

I REALLY want to move my CD processes to Centos. I want a GUI interface and want to rip and burn music CDs as well.....

I reviewed all in my sent box and went to the archives to find the start of thread that I had not saved. I don't have any more ideas, but did find one erroneous statement I made.

>From days past on LFS, when I was very active and less removed from
 the professional activities, I can say with certainty that the
 sr_mod and ide_cd are for the plain old cd-rom on your IDE channel.
 They are not required for the usb stuff.

The sr_mod *is* needed and I didn't see it in your lsmod output (probably because I said it wasn't needed?). It is needed. My confusion was from the fact that I was using the ide cdrw I had at that time as both scsi and with the newer (at that time) cd stuff that was part of Linux.

Anyway, see if an lsmod shows sr_mod. It probably does or the mods that depend on it should fail to load, or at least they should give error messages. Never mind! In a later post you show lsmod output and sr_mod is there.

lsmod|grep sr sr_mod 19941 0 scsi_mod 133069 4 sr_mod,sg,usb_storage,libata cdrom 36705 2 sr_mod,ide_cd

I see ide_cd is loaded too. IIRC, you do have one? Not to seem to foolish, but I don't recall seeing you use cdrecord with a dev= parameter. Any chance that the system is accessing the wrong device?

Over with DSL, I learned that they DON'T use the form: dev=/dev/scd0, but rather something like dev=0,0,1 where the 0,0,1 was learned via cdrecord -scanbus. So I have been doing the -scanbus and using things like dev=5,0,0 and I know that I am hitting the CDRW. Interestingly, the first number of the triplet seems to increment every time I unplug and plug back in the CDRW.

I went through each post in the archives in the thread and, using Firefox's search feature, didn't see a post where you showed a "dev=" being used with cdrecord. Maybe it's worth a try. Putting a written disc in the ide one should provoke an automount. Then a mount command would show what device is mounted. Then an ls would show which symlinks are pointing to that device. Then you could try cdrecord with a different one to make sure the correct one is accessed.

definitely using dev= And like I pointed out, with the Storix adding -force speed=4 and it does burn the CD. But the HP drive not. I am thinking next I try a speed=2 with the HP, as I recall it is a 6x writer.

Presuming that you tried all the things people mentioned in the other thread, the only course I see now is to make sure that the "configuration" on this box matches what is on the others as closely as possible. What modules loaded, /etc/cdrecord.conf, symlinks (allowing for multiple devices or not multiples), GUI config set up correctly (which device), ...

The scsi stack needed hasn't changed much in the last few years, as has not the devices used, config files used, ... The major variables I (guess I?) see are multiple devices (opportunity for confusion), USB 1.2 (?), configuration files and related, hardware status (good vs. failed)...

Have you, using the same cable and usb port, tried another device?

I have LOTS of cables and use the indiscriminately. I am not careful which USB port I use, and I have done this on a few different computers loaded with Centos 5. I only have the 2 devices, so I am limited there. The Storix is a 'newer' device than the HP, as it is a DVD/CDRW and the HP is only a CDRW.

A reading of Schilly's docs and man page might suggest something we have overlooked.

Schilly's doc?

I got tired of trying to read the man page, so found a version of it online: http://man-wiki.net/index.php/1:cdrecord and so far have not found anything else to try.