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#1 2010-02-08 01:27:41
- jones79
- New member
- Registered: 2010-02-01
- Posts: 3
e2fsck - unmount not possible
Hi!
Due to some filesystem errors I need to run e2fsck on my
DNS323. Using the boot image from http://www.inreto.de/dns323/fsck/
does not work, it does not even find the disks, so I am not able
do build the raid as described in the readme.txt.
And yes, I tried all of the images 
no success.
So I soldered a cable to gain access using the CON4 connector
on the DNS323īs mainboard. So far everything works fine and I can
break into the shell using the magic number.
But I cannot umount my Raid-Device /dev/md0, and receive the
message "Device or resource busy".
Forcing the umount with -f does not work, too.
Crawling through lots of e2fsck-umount-related stuff leaves me with
the commands "lsof" and "fuser", to display and kill the process
blocking the umount of /dev/md0.
But none of this commands is available within the shell.
So, I am out of ideas Can someone help me?
jones
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#2 2010-02-09 21:03:14
- jones79
- New member
- Registered: 2010-02-01
- Posts: 3
Re: e2fsck - unmount not possible
My Solution:
- Deactivate funplug: there are files in use that do not allow the unmount of the RAID-device.
- Restart DNS323 and attach the serial cable to CON4
- Break into the shell
- Now you can unmount the RAID-Device and execute e2fsck
As expected e2fsck found and corrected the errors in the file system.
The command I used was e2fsck -p -v /dev/md0
-p means correct all errors without user-interaction
-v is verbose mode
If you like, you can run e2fsck -n -v /dev/md0 before.
-n means readonly-mode, no changes are made, so you can
see if there are errors.
Last edited by jones79 (2010-02-09 21:03:31)
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