On Fri, Jun 18, 2010 at 12:39:10PM +1000, Neil Brown wrote:

quoted

1. Shutdown the RAID5.

2. Create a RAID10/f2 on top of one drive + missing, ignoring mdadm's
   warnings about an existing array. If I'm not terribly wrong, this
   will give me a degraded RAID10 that still has all my data in place.

I cannot imagine why you would think that all your data would be in place.
I can assure that it would not.

I was thinking it would be a similar case to the one mentioned here:

http://scott.wallace.sh/2007/04/14/converting-raid1-to-raid5-with-no-data-loss/

Guess I was wrong. Thanks for the advice.

Gilad