On 11/20/2013 02:46 PM, kustep wrote:

Hello Everyone,

is there an option to specifiy the "Unused Space : before=...."
Superblock information in mdadm -C ....?

I don't know about this, but ...

My Raid crashed due to a controller error, but I was able to make the
new superblock almost identical to the old one (using mdadm -C
--assume-clean --level=6 --raid-devices=11 --chunk=256K --metadata=1.2
--bitmap=None --size=195328588 --data-offset=128768 /dev/md0
/dev/mapper/disk[cdefmbjkh] missing). Looking at mdadm --examine the

This almost certainly didn't do what you think--square brackets in the
shell don't maintain the order of the letters given.  The device order
actually given to mdadm would have been [bcdefhjkm].  The bracket
notation will also leave out devices that don't actually exist.  You
need to use curly braces with commas to maintain a specific order.

FWIW,

Phil