hi all,
A colleague of mine questioned the fact that I created my raid array
using the command 'mkfs -t ext4 -v -m .1 -b 4096 -E
stride=16,stripe-width=144 /dev/md0'. He said that "When creating file
systems on lvm or md volumes, |mkfs.ext4| chooses an optimal geometry."
I wanted to run 'mkfs.ext4 -n /dev/md0' to see what settings it would
choose that were different to mine but it keeps saying:
"/dev/md0 is apparently in use by the system; will not make a filesystem
here!".
I also can't stop the array using 'mdadm --stop /dev/md0' as it says
mdadm: failed to stop array /dev/md0: Device or resource busy. pretty
much the same error occurs when trying lvchange -an /media/local/Raid
I've no problem with any of this except I can't find out what process
has a handle on the mount and/or why. so I can't stop/kill it.
I tried lsof | grep /media/local/Raid and fuser -m /media/local/Raid to
no avail. I also tried ps aux | grep Raid. I've stopped pretty much
everything in init.d including samba,nfs,mediatomb,squeezebox and
anything I can think of that I've installed.
Any advice/ideas please ?
cheers
Simon
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