Raidstop /dev/md0 won't work

Raidstop /dev/md0 won't work

[Scott Walter]

this is probably a very dumb question.. however I am not able to
raidstop my raid-array using, which i need to do before running
raidreconf.

%> raidstop /dev/md0
/dev/md0: Device or resource busy.
%>

any suggestions... i have already tried unmounting the device.

thanks.

Re: Raidstop /dev/md0 won't work

[Derek Vadala]

On Thu, 2 May 2002, Scott Walter wrote:

> this is probably a very dumb question.. however I am not able to
> raidstop my raid-array using, which i need to do before running
> raidreconf.
> 
> %> raidstop /dev/md0
> /dev/md0: Device or resource busy.
> %>

try doing fuser -m on /dev/md0 to see which processes are using it... 

# fuser -m /dev/md0
/dev/md0:             8685c

then us ps to figure out what's up
---
Derek Vadala, derek@cynicism.com, http://www.cynicism.com/~derek

Re: Raidstop /dev/md0 won't work

[Neil Brown]

On Thursday May 2, walter@cognigencorp.com wrote:
> this is probably a very dumb question.. however I am not able to
> raidstop my raid-array using, which i need to do before running
> raidreconf.
> 
> %> raidstop /dev/md0
> /dev/md0: Device or resource busy.
> %>
> 
> any suggestions... i have already tried unmounting the device.

This is a bug in raidstop.  If you strace you will notice that it
opens it twice and before trying to ioctl(STOP...) it.

Upgrade raidtools or use mdadm.

And a quick and dirty:

   mv /dev/md0 /dev/mdx
   mv /dev/md1 /dev/md0
   mv /dev/mdx /dev/md0
   raidstop /dev/md1
   mv /dev/md0 /dev/mdx
   mv /dev/md1 /dev/md0
   mv /dev/mdx /dev/md0

should work.

NeilBrown

> 
> thanks.
> 
> 
> 
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