Date: Mon, 17 Dec 2007 09:19:01 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: phk@phk.freebsd.dk Cc: cvs-src@FreeBSD.org, bms@incunabulum.net, bms@FreeBSD.org, cvs-all@FreeBSD.org, src-committers@FreeBSD.org Subject: Re: cvs commit: src/sbin/atacontrol atacontrol.c Message-ID: <20071217.091901.627251640.imp@bsdimp.com> In-Reply-To: <11419.1197903331@critter.freebsd.dk> References: <47668B2B.5030206@incunabulum.net> <11419.1197903331@critter.freebsd.dk>
next in thread | previous in thread | raw e-mail | index | archive | help
In message: <11419.1197903331@critter.freebsd.dk>
"Poul-Henning Kamp" <phk@phk.freebsd.dk> writes:
: > * NAND Flash devices should not have their sectors erased unless
: >absolutely necessary, to implement wear levelling.
:
: Wrong, almost exactly the opposite in fact:
:
: Flash devices using wear-levelling should have data erased as soon as
: possible to give the wear-levelling the maximum amount of information
: and available space to work with.
The formula for flash life has two components: The percentage of space
available and the data rate. So the more space, the longer it will
last for a given rate.
Warner
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20071217.091901.627251640.imp>