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Re-JeeP
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Location: Sweden
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 Posted: Wed Jan 31, 2007 7:17 pm Post subject: [SOLVED] cant eject cdrom |
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Hi!
When I run eject cdrom I get this message.
| Quote: | eject: tried to use `/dev/cdrom' as device name but it is no block device
eject: unable to find or open device for: `cdrom' |
I have installed the system quite recently but from what I can recall the eject has worked before...
Any ideas?
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Last edited by Re-JeeP on Fri Feb 02, 2007 10:33 pm; edited 1 time in total |
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tkhobbes
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Re-JeeP
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| Posted: Wed Jan 31, 2007 8:21 pm Post subject: |
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| tkhobbes wrote: | Hi
Where does /dev/cdrom point to?
so long
thomas |
The weird thing is that it doesn't exist... 
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yabbadabbadont
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| Posted: Wed Jan 31, 2007 9:29 pm Post subject: |
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Hence the error message...  From the eject manpage, it says that it will default to /dev/cdrom unless you specify the correct device or mount point. So either create a /dev/cdrom symlink or specify the correct device or mountpoint when you run eject.
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Re-JeeP
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| Posted: Wed Jan 31, 2007 9:40 pm Post subject: |
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| yabbadabbadont wrote: | | Hence the error message... From the eject manpage, it says that it will default to /dev/cdrom unless you specify the correct device or mount point. So either create a /dev/cdrom symlink or specify the correct device or mountpoint when you run eject. |
Shoulndt the cdrom be in /dev if there is support for it in the kernel?
How would you create a symlink? from / to? I have never done that before.
In the manual it also said that I should be able to eject with the mount point as the argument. But I get the same message there.
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yabbadabbadont
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| Posted: Wed Jan 31, 2007 10:03 pm Post subject: |
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Post the contents of your /etc/fstab file.
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Re-JeeP
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| Posted: Thu Feb 01, 2007 6:33 pm Post subject: |
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| yabbadabbadont wrote: | | Post the contents of your /etc/fstab file. |
Here is it!
| Quote: | | /dev/cdrom /mnt/cdrom auto defaults,user 0 0 |
Edit*
I actually solved it. ln -sf /dev/hdb /dev/cdrom did the job. But how can I make that to be permanent? Should I change in /etc/fstab to
| Quote: | | /dev/hdb /mnt/cdrom auto defaults,user 0 0 |
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yabbadabbadont
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| Posted: Fri Feb 02, 2007 1:48 am Post subject: |
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| Re-JeeP wrote: | I actually solved it. ln -sf /dev/hdb /dev/cdrom did the job. But how can I make that to be permanent? Should I change in /etc/fstab to
| Quote: | | /dev/hdb /mnt/cdrom auto defaults,user 0 0 |
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Udev should have created the link automatically for you... You might want to start researching udev cdrom issues.
I always change my fstab file so that the real device is listed for my cdrw and dvdrw drives. That way it doesn't matter if udev doesn't create the links properly. So I would say yes to your suggestion.
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Re-JeeP
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| Posted: Fri Feb 02, 2007 2:51 pm Post subject: |
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| yabbadabbadont wrote: | | Re-JeeP wrote: | I actually solved it. ln -sf /dev/hdb /dev/cdrom did the job. But how can I make that to be permanent? Should I change in /etc/fstab to
| Quote: | | /dev/hdb /mnt/cdrom auto defaults,user 0 0 |
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Udev should have created the link automatically for you... You might want to start researching udev cdrom issues.
I always change my fstab file so that the real device is listed for my cdrw and dvdrw drives. That way it doesn't matter if udev doesn't create the links properly. So I would say yes to your suggestion. |
I actually did get a lot of these messages when staring the computer. I think a as you said that I need to start researching udev issues.
| Quote: | | udevd-event[3346]: run_program: exec of program /sbin/udev_run_devd failed |
Changing in /etc/fstab didnt help.
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count_zero
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| Posted: Fri Feb 02, 2007 2:59 pm Post subject: |
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add this to your /etc/udev/rules.d/10-local.rules file. (and restart udev)
| Code: | | KERNEL=="hdb", SYMLINK="cdrom" |
Check out this nice tutorial on udev: http://www.reactivated.net/writing_udev_rules.html
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Re-JeeP
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| Posted: Fri Feb 02, 2007 6:22 pm Post subject: |
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Thanks. I will check that tutorial.
When I entered that folder I saw two udev-files.
| Quote: | ._cfg0000_50-udev.rules
05-udev-early.rules |
Could the problem be bacause I havent updated my config file?
If so, can I delete 05-udev-early.rules and rename ._cfg0000_50-udev.rules to 05-udev-early.rules?
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yabbadabbadont
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| Posted: Fri Feb 02, 2007 9:11 pm Post subject: |
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Always update your config files after package upgrades! As the various system ebuilds will warn you, your system is not guaranteed to work if you don't. Use either etc-update or dispatch-conf to update your config files.
You probably should re-emerge udev and maybe even baselayout.
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Re-JeeP
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| Posted: Fri Feb 02, 2007 9:32 pm Post subject: |
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| yabbadabbadont wrote: | Always update your config files after package upgrades! As the various system ebuilds will warn you, your system is not guaranteed to work if you don't. Use either etc-update or dispatch-conf to update your config files.
You probably should re-emerge udev and maybe even baselayout. |
I have read about etc-update but havent had time to install it yet. Sounds like its about time to make time for it... 
When you say re-emerge, do you mean just emerge it againl like this emerge baselayout udev or should I unmerge them first?
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yabbadabbadont
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| Posted: Fri Feb 02, 2007 10:16 pm Post subject: |
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etc-update is installed with portage, so you already have it.
Yes, when I said to re-emerge them, it just means to emerge them again. There isn't any need to unmerge them first, and in this case it would be very dangerous to do so. After thinking about it some more, I think you probably only need to emerge udev again. It's always best to start out with the smallest number of changes you can, and then add more if needed.
You might want to read through the portage documentation when you get a chance too.
http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?part=2&chap=1
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Re-JeeP
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| Posted: Fri Feb 02, 2007 10:32 pm Post subject: |
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| yabbadabbadont wrote: | | etc-update is installed with portage, so you already have it. |
Good to know...
| yabbadabbadont wrote: | | Yes, when I said to re-emerge them, it just means to emerge them again. There isn't any need to unmerge them first, and in this case it would be very dangerous to do so. After thinking about it some more, I think you probably only need to emerge udev again. It's always best to start out with the smallest number of changes you can, and then add more if needed. |
emerge udev did a very nice job! 
I read that part when installing the system. Might be time to read it again...
| Quote: | | Please add SOLVED to the subject of your original post when you feel that your problem is resolved. |
Done... Thanks very much for the help!
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