There may be an entry for /mnt/md0 in /etc/exports. If there is, usually the startup scripts will start an NFS server at boot time and the filesystem will be busy as long as that daemon is running. If you mount the volume after the scripts run a server won't be started and the volume can be manually unmounted without any errors. -Kanoa bo wrote: >Hello! > >I have found a VERY strange issue on using the name "md0" as a mount point. >If I use "/mnt/md0" as a mount point for the md device or normal HD device, >I could not umount it after booting the system having "device is busy" >error. > >However, it is OK if I manually make a RAID then mount it to "/mnt/md0". >I checked if it has any processes running on it with "fuser" but nothing. > >Does "/mnt/md0" have a special meaning(usage) for system? > >Please provide me a clue. > >Thanks, > >//Bo > >The followins are my experiment on this issue; > >root@P3000-PP1:/home/bmoon# cat /proc/mounts >/dev/root / ext2 rw 0 0 >none /proc proc rw 0 0 >/dev/md0 /mnt/md0 ext2 rw 0 0 >/dev/md3 /mnt/md3 ext2 rw 0 0 > >root@P3000-PP1:/home/bmoon# umount /mnt/md0 >umount: /mnt/md0: device is busy >--------------- >root@P3000-PP1:/etc# fuser -v /mnt/md0 > > USER PID ACCESS COMMAND >/mnt/md0 root kernel mount /mnt/md0 > >----------------after chnage the name of mount point from /mnt/md0 to >/mnt/user--------------- >root@P3000-PP1:/home/bmoon# cat /proc/mounts >/dev/root / ext2 rw 0 0 >none /proc proc rw 0 0 >/dev/md0 /mnt/user ext2 rw 0 0 >/dev/md3 /mnt/md3 ext2 rw 0 0 > >root@P3000-PP1:/home/bmoon# umount /mnt/user >root@P3000-PP1:/home/bmoon# >------------------------ >root@P3000-PP1:/etc# vi fstab >/dev/hda2 / ext2 defaults 1 1 >none /proc proc defaults 0 0 >/dev/hda3 swap swap defaults 0 0 >/dev/md0 /mnt/user ext2 defaults 0 0 >/dev/md3 /mnt/md3 ext2 defaults 0 0 > >Another experiment >---------------------- >root@P3000-PP1:/home/bmoon# cat /proc/mounts >/dev/root / ext2 rw 0 0 >none /proc proc rw 0 0 >/dev/hdb2 /mnt/md0 ext2 rw 0 0 >/dev/md3 /mnt/md3 ext2 rw 0 0 > >root@P3000-PP1:/home/bmoon# umount /mnt/md0 >umount: /mnt/md0: device is busy > > >- >To unsubscribe from this list: send the line "unsubscribe linux-raid" in >the body of a message to majordomo@vger.kernel.org >More majordomo info at http://vger.kernel.org/majordomo-info.html > > - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
