Hi ,

 I have mips board au1200 with a Samsung K9f1208V 64MB NAND flash which

is 528bytes/page and nor flash with 32M.  i have established a jffs2 filesystem as root filesystem

 in nor flash with 32M ,my sytem is ok if only use nor flash . now i plan to mount nand flash under

 jffs2 filesystem . I downloaded the newest yaffs2 code from "http://www.aleph1.co.uk/cgi-bin/viewcvs.cgi/yaffs"

 and place it to linux kernel 2.6.11. I select yafss and mtd support from muneconfig. After make,

 I got the error messages

at the end:

 all of transport is passed

1. i boot my board using jffs2 filesystem as root filesystem

 # cat /proc/mtd

 dev:    size   erasesize  name

 mtd0: 03c00000 00020000 "User11 FS"

 mtd1: 00100000 00020000 "YAMON"

 mtd2: 002c0000 00020000 "raw kernel"

 mtd3: 00800000 00004000 "NAND FSa 0"

 mtd4: 03800000 00004000 "NAND FSa 1"

 2. using the tools "flash_eraseall /dev/mtd6 ",passed

 3. # mount -tyaffs /dev/mtdblock4 /mnt/

 yaffs: dev is 32505860 name is "mtdblock4"

 yaffs: Attempting MTD mount on 31.4, "mtdblock4"

4. then there are erros when copying  data to mnt's directory

   the questions :

 when copy less 120k data , no errors,and the data is correct after i reboot

 however , copying more 100k data ,there are the following errors:

 ......................................... 

 **>>mtd ecc error unfixed on chunk 113984:0

 **>>mtd ecc error unfixed on chunk 113984:1

 **>>Block 3562 marked for retirement

 **>> yaffs chunk 114016 was not erased

 **>> Erasure failed 3563

 **>> Block 3563 retired

 ......

 **>> yaffs chunk 416 was not erased

 **>> Erasure failed 13

 ......

 yaffs tragedy: no more eraased blocks

 !!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!

 ......

 **>>mtd ecc error unfixed on chunk 1375:0

 **>>mtd ecc error unfixed on chunk 1375:1

 **>>Block 42 marked for retirement

 yaffs tragedy: no more eraased blocks

 !!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!

 ......................................... 

 then i try to exc command "df"

 /mnt # df

 Filesystem           1k-blocks      Used Available Use% Mounted on

 /dev/mtdblock0           61440     27308     34132  44% /

 tmpfs                      512        60       452  12% /var

 /dev/loop1                1244      1244         0 100% /root/test

 /dev/mtdblock4           57344     57344         0 100% /mnt

 exc command  "reboot"

 /mnt #df

 Filesystem           1k-blocks      Used Available Use% Mounted on

 /dev/mtdblock0           61440     27308     34132  44% /

 tmpfs                      512        60       452  12% /var

 /dev/loop1                1244      1244         0 100% /root/test

 /dev/mtdblock4           57344     57344         0 2% /mnt

 why ...

 what is somthing wrong ?

 according to some suggustion ,    I changed my oob placement as following :

  /* Define default oob placement schemes for large and small page devices */

static struct nand_oobinfo nand_oob_8 = {

        .useecc = MTD_NANDECC_AUTOPLACE,

        .eccbytes = 3,

        .eccpos = {0, 1, 2},

        .oobfree = { {3, 2}, {6, 2} }

};

static struct nand_oobinfo nand_oob_16 = {

        .useecc = MTD_NANDECC_AUTOPLACE,

        .eccbytes = 6,

        .eccpos = {0, 1, 2, 3, 6, 7},

        .oobfree = { {8, 8} }

};

static struct nand_oobinfo nand_oob_64 = {

        .useecc = MTD_NANDECC_AUTOPLACE,

        .eccbytes = 24,

        .eccpos = {

                40, 41, 42, 43, 44, 45, 46, 47,

                48, 49, 50, 51, 52, 53, 54, 55,

                56, 57, 58, 59, 60, 61, 62, 63},

        .oobfree = { {2, 38} }

};

 --------------------------------------------------------------------------

 While oob placements definition in yaffs_mtdif.c

 static struct nand_oobinfo yaffs_oobinfo = {

 .useecc = 1,

 .eccbytes = 6,

 .eccpos = {8, 9, 10, 13, 14, 15}

};

 then i change the struct " nand_oobinfo nand_oob_16" into

 static struct nand_oobinfo nand_oob_16 = {

 .useecc = 1,

 .eccbytes = 6,

 .eccpos = {8, 9, 10, 13, 14, 15},

};

but the errors is the same as before.  Anyclues what

could be wrong ..

Any help will be highly appreciated.

 regards

please help me out ...