From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.nokia.com ([192.100.105.134] helo=mgw-mx09.nokia.com) by bombadil.infradead.org with esmtps (Exim 4.68 #1 (Red Hat Linux)) id 1KO8xP-0002wJ-Ur for linux-mtd@lists.infradead.org; Wed, 30 Jul 2008 10:31:00 +0000 Subject: Re: Deep thinking about the Wear-leveling mothed From: Artem Bityutskiy To: xiaochuan-xu In-Reply-To: <1217409842.2786.1.camel@localhost.localdomain> References: <1217327479.2812.24.camel@localhost.localdomain> <1217398973.9048.7.camel@sauron> <1217409842.2786.1.camel@localhost.localdomain> Content-Type: text/plain; charset=utf-8 Date: Wed, 30 Jul 2008 13:25:58 +0300 Message-Id: <1217413558.9048.36.camel@sauron> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Cc: linux-mtd Reply-To: dedekind@infradead.org List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Wed, 2008-07-30 at 17:24 +0800, xiaochuan-xu wrote: > On Wed, 2008-07-30 at 09:22 +0300, Artem Bityutskiy wrote: > > Also, I am not sure it is save to erase one eraseblock several million > > times and do not erase neighbor eraseblocks. There are "radiation" > > effects in some flashes, when unused eraseblocks slowly "rot" when > > their > > neighbor eraseblocks are used a lot. >=20 > I'm sorry but I'm not understand this clearly. In this particular case I meant AG-AND flashes. They had "radiation" effect, which means if you have 2 eraseblocks A and B, and you change A a lot, but do not change B, B may become corrupted at some point. P.S. I have not idea if these flashes are still produced/used. --=20 Best regards, Artem Bityutskiy (=D0=91=D0=B8=D1=82=D1=8E=D1=86=D0=BA=D0=B8=D0=B9 =D0=90= =D1=80=D1=82=D1=91=D0=BC)