can't mount dvd-rom drive and odd device files in /dev

KamikazeMicrowave · n00b Joined: 20 Jan 2006 Posts: 71

Well first off I can't mount my dvd-rw DL drive. When I used gentoo under a vmware machine the drive was under /dev/cdroms/cdrom0. So thats what I set in the fstab.

nalf38 · n00b Joined: 22 Nov 2003 Posts: 27

is your dvd+rw SCSI or IDE? i'll assume it's IDE. i don't know if you're using udev or devfs, but i'll assume you're udev since that's the default gentoo setup these days. first off, both devfs and udev create a lot of device nodes in the /dev directory, whether they're in use or not, so you shouldn't be alarmed at the extra device listings in the /dev directory.

i'll admit that your error about "/dev/cdroms/cdrom0" not existing is downright *wierd*. is your dvd drive the only cd drive that you have? if so, you might try mounting it manually: 'mount /dev/hdc /mnt/cdrom' as 'su' and see what happens. (also, what are the contents of your '/dev/cdroms' directory?) this could be any number of problems....what kernel are you using? are you absolutely sure you compiled CD support into it?

as to your second problem, gentoo always recognizes my usb card reader first and my SCSI hard drive second, even though some live-cds do the opposite, so it could be that you're having the same issue.

i use the 'cdrecord' command to determine if my scsi / cd peripherals are detected. to see the order in which your "scsi" devices are detected, use "cdrecord -scanbus" as su. To see what CD drives are detected, i use "cdrecord -scanbus dev=ATAPI". this is assuming that cd device is IDE and not SCSI.

i don't know if any of this will help, but i hope it does.

n

Headrush · Posted: Tue Feb 21, 2006 5:27 am Post subject:

Recent changes to udev removed the older devfs named compatible device nodes.

If you are using udev, you can remove the device nodes in /dev, then make sure you have these entries in /etc/conf.d/rc

KamikazeMicrowave · n00b Joined: 20 Jan 2006 Posts: 71

Well I think I've solved the problems. Followed headrush's instructions and fixed the random device problem. I'm going to reboot just to make sure it stays this way. (By the way Headrush, great avatar...I absolutely love CP!! I go every year

)

As for the cdroms, I dont have a cdroms directory in /dev. I do however have a cdrom, cdrw, dvd, dvdrw device files. I mounted cdrom and cdrw and they seem to work. Not sure which file I should put in my fstab though... Ideas?

Oh yea, cdrecord recognized my drive and Im running 2.6.15-r1 gentoo-sources.

Headrush · Posted: Tue Feb 21, 2006 6:09 am Post subject:

wolfger · Posted: Sat Feb 25, 2006 1:07 am Post subject:

Having just recently switched to udev from devfs, I am having problems as well... But unlike KamikazeMicrowave, I do not have cdrom, cdrw, dvd, or dvdrw devices files in /dev. I'm lost. I did the "udevstart" thing, but no luck.
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Headrush · Posted: Sat Feb 25, 2006 1:41 am Post subject:

wolfger · Posted: Sat Feb 25, 2006 4:17 am Post subject:

Headrush · Posted: Sat Feb 25, 2006 5:38 am Post subject:

wolfger · Posted: Sat Feb 25, 2006 12:25 pm Post subject:

Headrush · Posted: Sat Feb 25, 2006 2:38 pm Post subject:

Can you post the output of

wolfger · Posted: Sat Feb 25, 2006 5:14 pm Post subject:

Headrush · Posted: Sat Feb 25, 2006 6:01 pm Post subject:

Yes typo.

Hmmm, our /sbin/cdrom_id file have different md5sums even though we have the same version of udev.
(Could be related to amd64 and x86 difference since it is not a text file.)

Other than that, your udev rules file looks ok. Maybe just how the kernel recognizes your drive and doesn't properly create the symlinks. If you have to, you can easily make a simple udev rule to create the symlinks.

wolfger · Posted: Sat Feb 25, 2006 6:46 pm Post subject:

Headrush · Posted: Sat Feb 25, 2006 6:56 pm Post subject:

Post the output of

wolfger · Posted: Sat Feb 25, 2006 8:34 pm Post subject:

Headrush · Posted: Sat Feb 25, 2006 8:43 pm Post subject:

Try this:

wolfger · Posted: Sat Feb 25, 2006 8:58 pm Post subject:

No dice. The file you had me append to did not previously exist, so now I have that file with just the one line on it, and it doesn't seem to have any effect.

Headrush · Posted: Sat Feb 25, 2006 9:32 pm Post subject:

wolfger · Posted: Sat Feb 25, 2006 9:56 pm Post subject:

nicohellcat · n00b Joined: 13 Dec 2005 Posts: 1 Location: montpellier

hey Wolfger, im a n00b too, and had the EXACT same problem. plus, we seem to have the same hardware .. weird ... or not?

so, what i did after seeing that i was also looking for "hdc", is edit my fstab, instead of /dev/cdroms/cdrom0 i put /dev/hdc .. i was like, it's worth the shot ... why not? *save* *udevstart*

and bang ! i can mount /dev/cdrom .... its saying read only, i have to go fiurther, but at least it's working ^^

hope that helps .......... cheers
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wolfger · Posted: Wed Mar 08, 2006 2:18 pm Post subject:

That did and did not work. Soon as I did that, KDE recognized the disc in the drive, but the program I was trying to use (lxdvdrip) was still trying the old name. I created symbolic links at /dev/cdrom and /dev/dvd, and now I am ready to.... go after the next problem (why my DVD-RW apparantly no longer supports track-at-once mode).
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Headrush · Posted: Wed Mar 08, 2006 2:24 pm Post subject:

wolfger · Posted: Wed Mar 08, 2006 2:28 pm Post subject:

No, it did not.
Unless I did something horribly wrong, which is a possibility.

Headrush · Posted: Wed Mar 08, 2006 2:39 pm Post subject: