Hi Vitaly, Thanks for responding to my msg. We are using ST Micro 256 MB , large page, 2048 bytes, OOB 64 bytes. Linux Kernel Version -- 2.6.11.7 MTD -- 2.6.17.11 ( I had pulled in the MTD code from 2.6.17.11 and back ported in 2.6.11.7 version). This , I have tested with JFFS2 and seems to work fine. I can certainly try to port MTD or NAND driver from 2.6.18 version. I also noted in the YAFFS code that it does few things very differently for Linux Version <= 2.6.17. And since I am using 2.6.11.7 Kerenle and 2.6.18 MTD/NAND, Do you think it may be creating a mismatch incompatability. thanks , Arvind ----- Original Message ----- From: "Vitaly Wool" To: "arvind" Cc: Sent: Friday, December 15, 2006 1:45 PM Subject: Re: [Yaffs] YAFFS looses files on remount > Hello, > > On 12/15/06, arvind wrote: > > > > I am trying to use YAFFS2 with Linux 2.6.11.7 with 256MB STMicro Nand. > > I can mount the NAND Partition successfully and copy/read files to it. > > > > But when I unmount, I get several Checkpoint warnings and on Mounting the > > file > > system, I see lots of Checkpoint messages (find next checkpt block: ) and > > most > > with "eccr 0" and some with"eccr 3". > > > > And when I list the files, all the files are missing , with lot of entries > > in "lost+found", as if somehow checkpoint index is corrupted. > > > > Any ideas , suggestions ? What am I missing here. > > > > can you please provide more info on that? I. e. page size, the driver you > are using etc. > > Basically the advice would be: use 2.6.18 version. If you can't, you will > probably need to modify your NAND flash driver. > > Vitaly >