Greetings.
I have spent TEN hours trying everything other than regressing to a
REALLY old version. I started out on 3.1.4 and have also tried manually
upgrading to 3.2.1, but the bug still exists.
Somewhere along the way, the "auto" partitionable flag has broken.
sudo mdadm --create --level=raid5 --auto=part2 /dev/md1 --metadata=1.2
--raid-devices=4 /dev/sda2 /dev/sdb2 /dev/sdc2 /dev/sdd2
This only creates /dev/md1. It is of course possible to create one big
partition as /dev/md1p1 with any partitioning program, but FORGET about
trying to create /dev/md1p2.
The problem is that the RAID array is NOT created in partitionable mode,
and only supports one large partition, despite ALL attempts at EVERY
format of the --auto option, you name it, -a part2, --auto=mdp2,
--auto=part2, --auto=p2, --auto=mdp, --auto=part, --auto=p, --auto=p4,
you name it and I've tried it!
My guess is the functionality of creating partitionable arrays literally
DID break somewhere prior to/at version 3.1.4 which is the earliest
version I tried.
I'm giving up and creating physical n-1 sized partitions on the source
disks and creating two RAID 5 arrays from those partitions instead, but
decided I really MUST report this bug so that other people don't bang
their head against the wall for ten hours of their life as well. ;-)
Christopher
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