Hi,

Problem:
I mount a CD, an I start copying it. If the CD is broken (scratched or whatever ), instead of trying to copy some seconds and then quiting with an error message, my system keeps on trying to read the CD. Therefore I can not unmount and eject the CD unless I restart the computer; I can not kill the process that tries to read the CD either..
This happened on all Red Hat flavors that I have used (now I use FC3). On Mandrake, things worked better from this point of view.

I there any possibility to configure how much time or how many times the system should retry reading the when it meets a I/O error ?

Thanks,
G!m!

for that

try

fuser -k <where u drive is mounted>

or

fuser -k /dev/cdrom
whatever ur device name is

then try to unmount

regards

hi.
maybe you should try the the 'eject' command.

greetings, grim

eject won't allow u to unmount it forcefully
it wil report that the device is busy

so use fuser first then eject it

regards

I normally use this: (as root)

umount -lf /dev/cdrom
eject /dev/cdrom

you may need to kill any processes that are using the device

Hi again,
Thanks for your answers.
What I usually try in the described situation is:
lsof /dev/cdrom
I get the PIDs of all processes that use the device and then kill -9 PID
This is similar to your suggestions, but it does not work.
Even after the processes are killed, the umount is frozen, and the CD drive is spinning.
Nevertheless I will try your recommendation as well and give some feedback with the results.

Cheers,
G!m!

well lsof then killing each PID is more tiresome then fuser
so i think fuser will surely help u

regards

umount -l /dev/whatever always gets them unmounted. Read the man umount