On Mon, 20 Jan 2014 16:43:38 -0500 den Hoog [off-list ref] wrote:

Hello Neil,

thanks again for spending time on this when you're already swamped, I
appreciate it much

the commands look logical for my setup (just a type on the chunk size,
needs tobe capital K)
I did not dare to fire off the last command last time, but as missing
seems to be available for imsm, I re-processed all of the commands
again

the Raid0 is created without any trouble (only stating it is already
part of an array, confirmed with Y), but the raid5 array won't.
After it also stated sdc sdd sde are part of an array, and confirming
with Y for the create, it gives the following:

"mdadm: unable to add 'missing' disk to container"
I'm using mdadm - v3.2.6 - 25th October 2012.
Could it be the 3.2.6 does not support missing for imsm?

That's weird.  I'm sure I tested it yesterday and it worked.
Today it doesn't in exactly the way you describe.
I'll have a poke and see what is happening.

Support for 'missing' with mdadm was supposedly added in 3.2.3...

NeilBrown