Re: /dev/md0: Device or resource busy

[dean gaudet]

On Sun, 17 Mar 2002, Alan Cox wrote:

> > i have 3 other md devices which i can stop no problem (even with 0xfd
> > autodetection), just not /dev/md0.
> >
> > % raidstop /dev/md0
> > /dev/md0: Device or resource busy
> >
> > i don't have any filesystem mounted on md0, and "lsof | grep md" doesn't
> > show anything.
>
> lsof isnt always the most reliable to tools if a kernel thread or nfs
> ran off with it. Is md0 doing anything else - like rebuilding. Is there
> anything that has been triggered or run from it - paticularly kernel
> threads

nothing that i'm aware of -- i've never put these devices into fstab.  i
disabled smartsuite because it was holding /dev/hdN open, but that didn't
change anything.

i just tried a "linux init=/bin/sh" boot, and it's still saying Device or
resource busy:

init-2.05a# raidstop /dev/md0
md: md0 still in use.
/dev/md0: Device or resource busy
init-2.05a# mount /proc
init-2.05a# cat /proc/mdstat
Personalities : [linear] [raid0] [raid1]
read_ahead 1024 sectors
md0 : active raid1 hdi1[1] hde1[0]
      131392 blocks [2/2] [UU]

md1 : active raid1 hdi2[1] hde2[0]
      78045824 blocks [2/2] [UU]

md2 : active raid1 hdk1[1] hdg1[0]
      78177344 blocks [2/2] [UU]

unused devices: <none>
init-2.05a# ps auxww
USER       PID %CPU %MEM   VSZ  RSS TTY      STAT START   TIME COMMAND
root         1  6.9  0.1  2312 1284 ?        S    11:11   0:07 init
root         2  0.0  0.0     0    0 ?        SW   11:11   0:00 [keventd]
root         3  0.0  0.0     0    0 ?        SWN  11:11   0:00 [ksoftirqd_CPU0]
root         4  0.0  0.0     0    0 ?        SWN  11:11   0:00 [ksoftirqd_CPU1]
root         5  0.0  0.0     0    0 ?        SW   11:11   0:00 [kswapd]
root         6  0.0  0.0     0    0 ?        SW   11:11   0:00 [bdflush]
root         7  0.0  0.0     0    0 ?        SW   11:11   0:00 [kupdated]
root         8  0.0  0.0     0    0 ?        SW   11:11   0:00 [mdrecoveryd]
root         9  0.0  0.0     0    0 ?        SW   11:11   0:00 [raid1d]
root        10  0.0  0.0     0    0 ?        SW   11:11   0:00 [raid1d]
root        11  0.0  0.0     0    0 ?        SW   11:11   0:00 [raid1d]
root        16  0.0  0.0  2600  792 ?        R    11:13   0:00 ps auxww

-dean