Allow data-offset to be specified per-device for create

 mdadm --create /dev/md0 .... /dev/sda1:1024 /dev/sdb1:2048 ...

The size is in K unless a suffix: K M G is given.
The suffix 's' means sectors.

Signed-off-by: NeilBrown <neilb@suse.de>
9 files changed