Impossible to stop raid device

Posted by Traroth on Server Fault See other posts from Server Fault or by Traroth
Published on 2011-07-01T14:37:51Z Indexed on 2011/07/01 16:23 UTC
Read the original article Hit count: 290

Filed under:

linux

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debian

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raid

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mdadm

I'm trying to stop a RAID disk in order to replace it by a new one, as this one is not working properly.

I'm typing mdadm --stop /dev/md1, and I'm getting an error message:

mdadm: fail to stop array /dev/md1: Device or resource busy

I'm getting this message even if I reboot the server, and I can't see a process that could cause this.

The server is working under a Debian with a 2.6.18-4-amd64 kernel. Could you help?

Edit: Mote details about what my colleague tried out.

After unmounting sda1, the command mdadm --remove /dev/md0 /dev/sda1 worked. But now, we still have an error message after mdadm --remove /dev/md1 /dev/sda5:

mdadm: hot remove failed for /dev/sda5: Device or resource busy

I still don't understand completly how the different partitions are mounted, so I suppose there is something I don't understand in the currenct situation...

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