Thanks Brad. Can you suggest me a few steps for debugging this issue ? Like I would like to read this nand device contents. I couldn't do it with nanddump. Is thr any other way to get the contents of the nand ? I would like to read a particular location on the nand, the contents on that particular location ? Thanks, Chandru. -----Original Message----- From: yaffs-bounces@lists.aleph1.co.uk [mailto:yaffs-bounces@lists.aleph1.co.uk] On Behalf Of yaffs-request@lists.aleph1.co.uk Sent: Friday, February 09, 2007 5:31 PM To: yaffs@lists.aleph1.co.uk Subject: yaffs Digest, Vol 21, Issue 3 Send yaffs mailing list submissions to yaffs@lists.aleph1.co.uk To subscribe or unsubscribe via the World Wide Web, visit http://lists.aleph1.co.uk/cgi-bin/mailman/listinfo/yaffs or, via email, send a message with subject or body 'help' to yaffs-request@lists.aleph1.co.uk You can reach the person managing the list at yaffs-owner@lists.aleph1.co.uk When replying, please edit your Subject line so it is more specific than "Re: Contents of yaffs digest..." Today's Topics: 1. Re: Bad blocks - DMESG (Brad Beveridge) ---------------------------------------------------------------------- Message: 1 Date: Thu, 8 Feb 2007 17:05:11 -0800 From: "Brad Beveridge" Subject: Re: [Yaffs] Bad blocks - DMESG To: yaffs@lists.aleph1.co.uk Message-ID: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Hi Chandru, Blocks on NAND chips can and do go bad, and chips often come from the factory with bad blocks. It looks like Yaffs has marked four blocks bad, which is probably to be expected if this is the first time you've run yaffs on this device. In my experience, after an initial flurry of blocks being marked as bad, things will settle down and blocks will stay good for a long time. If you can read and write files reliably to the Yaffs partition without excessive numbers of blocks being marked bad, then I would believe that you have set Yaffs up correctly. NAND drivers are often all or nothing, either it works properly, or it really doesn't work at all. Hope that helps, Brad ------------------------------ _______________________________________________ yaffs mailing list yaffs@lists.aleph1.co.uk http://lists.aleph1.co.uk/cgi-bin/mailman/listinfo/yaffs End of yaffs Digest, Vol 21, Issue 3 ************************************ __________ NOD32 2045 (20070208) Information __________ This message was checked by NOD32 antivirus system. http://www.eset.com