From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ww0-f49.google.com ([74.125.82.49]) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1REdOw-0000te-78 for linux-mtd@lists.infradead.org; Fri, 14 Oct 2011 08:45:58 +0000 Received: by wwg9 with SMTP id 9so544323wwg.18 for ; Fri, 14 Oct 2011 01:45:56 -0700 (PDT) Subject: Re: erase block < 8KiB From: Artem Bityutskiy To: angelo Date: Fri, 14 Oct 2011 11:45:26 +0300 In-Reply-To: <4E8977DF.1030808@gmail.com> References: <4E8977DF.1030808@gmail.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Message-ID: <1318581933.12351.70.camel@sauron> Mime-Version: 1.0 Cc: "linux-mtd@lists.infradead.org" Reply-To: dedekind1@gmail.com List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Mon, 2011-10-03 at 10:52 +0200, angelo wrote: > Hi all, > > i read several mail about this limitation. > > http://lists.infradead.org/pipermail/linux-mtd/2011-February/033851.html > http://lists.infradead.org/pipermail/linux-mtd/2011-June/036498.html > > > I have a 4 KiB erase-size, common of some SST nor flash'es like mine > (SST 39VF3201B). > > From all the posts i read here in the list, there seems not to be any > solution guaranteed. > > The tricky change to mkfs.jffs2 don't work for me. It seems to work for > small files, but i still get error messages copying a 600KB file in the > partition. > If it's true that the minimal jffs2 block is 4KB + some bytes, of course > the patch to mkfs.jffs2 can't work. > > Some one suggested the "virtual erase block" solution. I would like to > try to implement it, if i have the time. > > In any case, for the common users, is there maybe another flash file > system that can work with 4KiB erase size ? Just hack your driver and make it emulate larger eraseblocks and make JFFS2 happy. Should not be difficult. -- Best Regards, Artem Bityutskiy