Converting LBAs to byte offsets through the GEOM stack

[Pokala, Ravi]

Hi Adrian,

>So I had a thing that I attached commands to that would funnel down to
>the geom layer that did this mirroring/caching/remapping thing, and it
>would handle schedule the commands to whatever block(s) on whatever
>disk(s) actually represented that particular logical offset. I actually
>had something that'd let me issue commands that would map to a single
>command to a single disk, or could be replicated to multiple commands to
>multiple disks (and then i'd just get the completion from them all in the
>reply message, as the bio didn't have enough space to write multiple
>block reads into, and mostly I was issuing status check commands like you
>are. :)
>
>Is that making more sense? I can whiteboard it up next time we're in the
>same place.

That would be very helpful. :-) Next BAFUG?

-Ravi