Flash disks and FFS layout heuristics

[Martin Fouts]

> -----Original Message-----
> From: Bakul Shah [mailto:bakul at bitblocks.com] 
> Sent: Monday, March 31, 2008 3:39 PM
> To: Poul-Henning Kamp
> Cc: Matthew Dillon; Christopher Arnold; arch at freebsd.org; 
> qpadla at gmail.com; freebsd-arch at freebsd.org; Martin Fouts
> Subject: Re: Flash disks and FFS layout heuristics 

> One thing I forgot to add: I'd let the lower level handle bad 
> block forwarding and wear levelling (like on the m-tron device).
> 

One of the difficulties of doing things this way comes from the
complexity of dealing with garbage collection when you want to reuse an
erase unit.