LinuxQuestions.org - Can't unmount my drives?!?!

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Can't unmount my drives?!?!

Hi for some reason that I cannot figure out, I cannot unmount devices as an ordinary user - or even as root any more. I can mount them no problem, but I just cannot unmount them. If I try I get an error message saying:

Code:

sudo umount /dev/hda1

umount: /mnt/hda1: device is busy

umount: /mnt/hda1: device is busy

But the same is true if I try to unmount any of my devices.

Here is myfstab file.

Code:

/dev/hda3  /  reiser4  defaults  0  1

/dev/hda7  /home  reiser4  defaults,auto  0  2

/dev/hda6  /boot  ext3  defaults,auto  0  2

proc  /proc  proc  defaults  0  0

/dev/fd0 /mnt/floppy subfs fs=floppyfss,iocharset=iso8859-1,users,sync,umask=000

usbfs  /proc/bus/usb  usbfs  devmode=0666  0  0

tmpfs  /dev/shm  tmpfs defaults  0  0

/dev/hdc /cdrom subfs fs=cdfss,iocharset=iso8859-1,users,ro,exec,umask=0000 0 0

/dev/hdd /dvd  subfs fs=cdfss,iocharset=iso8859-1,users,ro,exec,umask=0000 0 0

/dev/hda5 none swap defaults 0 0

/dev/sda1 /mnt/ntfs_1 ntfs noauto,users,ro,exec,umask=0000 0 0

/dev/hda1 /mnt/hda1 vfat auto,uid=1000,gid=1000,exec,umask=000,shortname=mixed,quiet 0 0

/dev/hdb1 /mnt/hdb1 vfat auto,uid=1000,gid=1000,exec,umask=000,shortname=mixed,quiet 0 0

none /sys sysfs defaults 0 0

Has anyone got any idea what is going on?

It was working fine a few days ago. I have probably installed some updates since then, but beyond this I haven't changed my fstab at all.

GJ

try umount /mnt/hda1 -l (lowercase letter "L")

Code:

-l    Lazy  unmount.  Detach the filesystem from the filesystem hierarchy

      now, and cleanup all references to the filesystem as soon as it  is

      not busy anymore.  (Requires kernel 2.4.11 or later.)

/dev/hda1 /mnt/hda1

sudo umount /mnt/hda1

Try unmounting the mounting point and not the device. let us know if that works. Also try to su to root then umount. sudo won't do somethings.

Also make sure that no processes or apps are currently using the drive.

I am running Red Hat 9, in a lab environment in school, and I've encountered this problem trying to umount the floppy at times, as well as a usb device.

For the usb, I checked the processes and killed them -9 baby, and it worked like a charm then. However, that didn't work for my floppy. But I read this and got the Lazy Umount command, and it worked fine.

Just FYI, I'd thought I'd let you guys know that it worked for my problem, and thanks.

wow, that's really bringing a thread back from the dead. :p but glad to know it worked for you. i'll also take this opportunity to change a small typo in my original post. :D