Re: discover not finding CDROM
Apparently, _Paul Yeatman_, on 04/25/2005 02:00 PM,typed:
Hello and thanks!
Hi. You are welcome.
Answers to your questions...
If you could answer a few questions, we might narrow down where your
problem really is:
1) What are the relevant contents of /etc/fstab that you have?
/dev/cdrom0 /media/cdrom0 iso9660 ro,user,noauto 0 0
/dev/cdrom1 /media/cdrom1 iso9660 ro,user,noauto 0 0
Okay, honestly, I am not at all sure about these cdrom? things. In my
computer running Sarge, I have made /media/cdrw and /media/cdrom and put
these in my /etc/fstab and they are working fine. I did notice however
that after installation of Sarge, I ended up with /cdrom0 and /cdrom1
(IIRC) mount points. Never figured out what they were supposed to do.
2) What are the mount points that you use to access /dev/hdc and /dev/hdd?
I believe this is indicated in the answer to the first question unless I"m not understanding your question.
Just wanted to make sure mount points exist and are correct.
3) Are you in the 'cdrom' group?
Yes!
You must be for this to work (belonging to the 'disk' group is not
recommended as I found out here). Secondly, if you want automounting of
usb sticks and the like to work, you also need to be in plugdev group
unless I am really mistaken but I am sure somebody more knowledgable
here can confirm this.
4) What are the permissions of /dev/hdc and /dev/hdd?
brw-rw---- 1 root disk 22, 0 Apr 29 2004 /dev/hdc
brw-rw---- 1 root disk 22, 64 Apr 29 2004 /dev/hdd
Ah, so this is interesting. Under kernel 2.4, I was using scsi
emulation for the IDE cdrom devices. Thus the /dev/scd? entries are in
group 'cdrom'. /dev/hd[cd], currently, are not, however. This seems
it should be changed. I would anticipate that 'discover' would do this
auto"magically" if it found the cdrom devices yet, as already stated,
it does not.
The permissions here need to be root:cdrom. I also had to change them
manually after installation of Sarge.
5) What are the contents of /media?
# ls /media/
cdrom floppy floppy0 sophos_server
I put the "sophos_server" mount point here. All others I believe
were part of the Gnome or otherwise installation. There are no
cdrom[01] mount point directories here (as there used to be under
kernel 2.4) yet this seems to be a symptom of the fact that 'discover'
does not find the devices. I can manually create such directories but
this doesn't seem to solve anything (and such manual entries may be
getting deleted upon each reboot by 'discover').
I deleted these directories before doing the 'ls' to show what was
there before beginning to futz around (and upon first boot into
2.6).
I think discover for some reason puts cdrom? into / and you end up with
/cdrom0 and /cdrom1. But if yo go ahead and put these in /media,
everything should work.
6) Do you have hal, hotplug, dbus-1, gnome-volume-manager installed?
What versions?
# dpkg -l hal hotplug dbus-1 gnome-volume-manager
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==============-==============-============================================
pn hal <none> (no description available)
ii hotplug 0.0.20040329-2 Linux Hotplug Scripts
ii dbus-1 0.23.4-1 simple interprocess messaging system
pn gnome-volume-m <none> (no description available)
Hmmm, it seems gnome-volume-manager would be responsible for mounting
the CD's upon insertion although apparently not installed. Even with
it "purged" I have the preference configuration GUI to specify whether
to have inserted CD's mounted or not. If gnome-volume-manager was
recentinly uninstalled for some reason, this would explain things
although I'm not convinced it was ever installed.
Thanks, again.
Just a note that things were working fine and as desired under kernel
2.4, ie. everything seemed to be in place . . . I was in cdrom group,
correct entries were in fstab, mount points existed, things were
automounting (by Gnome not autofs). Going to 2.6, scsi emulation of
IDE cdrom devices doesn't seem to be the same (not available...? ...at
least not by 2.6.8) so that is a change as well as 'discover' no longer
finding the cdrom devices itself.
Discover should still find the drives, wonder why it doesn't -- maybe
becuase you are missing hal. Only that now they are /dev/hd[cd]. Anyway:
Change permissions of /dev/hd[cd] to root:cdrom.
Make the mount pionts that you want in /media (even in / will do).
Try inserting a CD. It should work.
If it doesn't, install gnome-volume-manger. If it does, still install
gnome-volume-manger and add yourself to plugdev group if you also want
automounting and icons-on-desktop for any USB disk that you may plug in.
GL,
->HS
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