From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: From: Charles Forsyth Date: Thu, 13 May 2010 11:41:08 +0100 To: 9fans@9fans.net In-Reply-To: <67b4fb8b76d32f954fd53fd84d757a66@plan9.bell-labs.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Subject: Re: [9fans] arm ports update Topicbox-Message-UUID: 2025806a-ead6-11e9-9d60-3106f5b1d025 >the flash translation layer, which was developed for nor flash and is >suspect with nand flash it's not "suspect" as such: just not implemented because it's the wrong approach. FTL's design assumes you can rewrite a word, flipping bits off (but never on), to change a physical/logical map efficiently. fine with NOR, it allows that easily. drivers for NAND would need to do something more costly to emulate that effect, because the granularity is much larger, and the organisation and rules generally are different. i don't think they bother (because it's not a good idea) so it probably wouldn't work.