From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp25.singnet.com.sg ([165.21.101.224]) by pentafluge.infradead.org with esmtp (Exim 3.22 #1 (Red Hat Linux)) id 16U4CV-0002pS-00 for ; Fri, 25 Jan 2002 11:07:19 +0000 Message-ID: <3C513E7B.6010808@smartbridges.com> Date: Fri, 25 Jan 2002 19:16:11 +0800 From: Nikhil Goel MIME-Version: 1.0 To: David Woodhouse CC: Ramya Ravichandran , linux-mtd@lists.infradead.org Subject: Re: Cf Card vs DiskOnChip References: <20020125103941.26958.qmail@web8101.in.yahoo.com> <4181.1011956000@redhat.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-mtd-admin@lists.infradead.org Errors-To: linux-mtd-admin@lists.infradead.org List-Help: List-Post: List-Subscribe: , List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: David Woodhouse wrote: > rrhsin@yahoo.co.in said: > >>industrial environment. I am unable to decide whether to use a Compact >>Flash card or DiskOnChip.With 128MB I need to get the whole thing >>running. Can someone plese tell me as which one to use and why? > > The downside of the DiskOnChip is that the Linux driver doesn't do wear > levelling, although it's easy enough to add, and that the vendor's driver > is a binary-only module and hence of dubious legality. > > I would go for the DiskOnChip and add wear levelling support - all you need > to do it make it randomly pick a clean block for erasure occasionally, to > make sure stuff moves around over time. Isn't that similar to the implementation of JFFS? So a DiskOnChip running on the CVS based driver with JFFS should suffice for wear-levelling! if I am missing some piece here, what should I rtfm? regards, nikhil -- -- Nikhil Goel Ph: +65 3240210 Ext 20, Fax: +65 3240607 Reality is a crutch for those who can't handle science fiction.