[FreeBSD-Announce] Foundation Announces NAND File System for FreeBSD Project

[Julian Elischer]

On 3/2/12 7:30 AM, Julian H. Stacey wrote:
> Hi freebsd-fs at freebsd.org
> cc Deb
>
> Deb Goodkin wrote to announce@ Thu, 01 Mar 2012 11:45:53 -0700 (19:45 CET):
>> The FreeBSD Foundation is pleased to announce that Semihalf, an
> ...
>
> I was interested to read more background, but no URLs,
> so I found http://www.semihalf.com/&  re.
> 	NAND Flash File System
> found:
>   http://en.wikipedia.org/wiki/Flash_memory#NAND_flash
> 	"Manufacturers try to maximize the amount of usable storage
> 	by shrinking the size of the transistor below the size where
> 	they can be made reliably, to the size where further
> 	reductions would increase the number of faults faster than
> 	it would increase the total storage available."
> 	-
>     Really scarey if that is taken literaly, I jhs@ presume loose phraseology,
> 	hopefully someone who knows more will rephrase that :-).

working for a flash memory based company I can say that flash is 
getting crappier and crappier.
Slower, less reliable, more damaged by overuse, more sensitive to 
temperature, etc. etc.
we're talking about sensing the difference between 100 trapped 
electrons and 75 trapped electrons.


>   http://en.wikipedia.org/wiki/YAFFS
>
>   http://www.yaffs.net/yaffs-nand-specific-flash-file-system-introductory-article
> 	GPL licence. Must release any linked sources.
>
> Cheers,
> Julian