On Wed, 16 Dec 2009, Marco Peereboom wrote:

quoted text
> The issue isn't the 4k blocks.  The issues are the 512 bytes constants
> or 1 << 9  or DEV_BSHIFT or DEV_BSIZE that are all over the tree.  I
> know for a fact that softraid is busted with these devices and you can
> bet that the wrong assumption has been made in other places as well.
> 
> Making these drives work will be painful.  But we could start with the
> 520 byte ones ;-)

520 byte blocks would be good for a softraid crypto mode that calculated a
128-bit MAC per sector - it could stash it along with a 512 byte block
without needing to stride :)

-d