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 4.69 #1 (Red Hat Linux)) id 1MfrIA-0000lK-MT for linux-mtd@lists.infradead.org; Tue, 25 Aug 2009 08:22:15 +0000 Message-ID: <4A939F1E.2050707@gmail.com> Date: Tue, 25 Aug 2009 11:21:50 +0300 From: Artem Bityutskiy MIME-Version: 1.0 To: Joakim Tjernlund Subject: Re: Ideal NAND flashes for JFFS2 or YAFFS References: <4A8FAEFA.6070304@gmail.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Cc: linux-mtd@lists.infradead.org List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On 08/24/2009 09:44 PM, Joakim Tjernlund wrote: > Artem Bityutskiy wrote on 22/08/2009 10:40:26: >> >> On 08/22/2009 11:30 AM, Joakim Tjernlund wrote: >>> >>> We are looking into using NAND flash instead of NOR flashes in our design and I am >>> trying to find out how the ideal NAND flash should look like to be used as a >> JFFS2 or YAFFS >>> file system. We are mainly looking for speed and reliability. Power cuts are common >>> for our boards. >> >> Not sure about the FSes, but we are happy with speed and reliability >> of OneNAND from Samsung. > > Looking briefly at OneNAND is seems to be a somewhat complicated device with > builtin SRAM and a emulated NOR interface. > > Is this really a good fit for FS:es like JFFS2 or YAFFS? Well, depends. I just told what we used and found to be very fast and reliable. We even erased one PEB 2000000+ times, and it did not die. But yes, this is a complex device with HW ECC support, etc. -- Best Regards, Artem Bityutskiy (Артём Битюцкий)