On Fri, Mar 12, 2010 at 05:39:47PM +0000, John Robinson wrote:
Before I have to go to a customer's premises and try it, I wanted to ask if
anyone had already done anything like this: I have a CentOS 5 system with
0.90 metadata and type fd partitions with RAID-5 over 3 discs. I want to
grow it by replacing the drives. If I dd the small partitions onto larger
ones on the new discs, then reboot, will the system recognise the RAID-5 -
which now has its metadata somewhere in the middle of the paritions not at
the end - so that I can then --grow?
I believe it won't work
mdadm has no way to know where the metadata is in the above case.
you have to follow the painful procedure
fail one drive (mdadm /dev/mdX --fail /dev/sdY)
remove it (mdadm /dev/mdX --remove /dev/sdY)
replace drive with larger one
create larger partition
add drive again (mdadm /dev/mdX --add /dev/sdY)
wait for it to resync...
...and repeat until all drives have been replaced
L.
--
Luca Berra -- bluca@xxxxxxxxxx
Communication Media & Services S.r.l.
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