Re: [Yaffs] yaffsVersion meaning

Yaffers,

Thanks very much for all the help.

On my 2.4 kernel my yaffs_oobinfo looks like:

$7 = {useecc = 1, eccbytes = 6, oobfree = {{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0,
0}, {0, 0}, {0, 0}, {0, 0}}, eccpos = {8, 9, 10, 13, 14, 15, 0 <repeats 26 times>}}

and mtd->oobavail=8

an example oob looks like:

00004c40: 0300 1037 ffff 0601 5566 5b68 c1ff ffff ...7....Uf[h....

I'm guessing the format is: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5

On yaffs2, for backward compatibility with the above, should I set
nand_oob_16 to

--------------------------------------------
static struct nand_ecclayout nand_oob_16 = {  /* use older yaffs1 layout */
    .eccbytes = 6,
    .eccpos = { 8, 9, 10, 13, 14, 15 },
    .oobavail = 9,
    .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }};
--------------------------------------------

with CONFIG_YAFFS_9BYTE_TAGS=y

or

--------------------------------------------
static struct nand_ecclayout nand_oob_16 = {  /* use older yaffs1 layout */
    .eccbytes = 6,
    .eccpos = { 8, 9, 10, 13, 14, 15 },
    .oobavail = 8,
    .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 } }};
--------------------------------------------

with CONFIG_YAFFS_9BYTE_TAGS not set?

One other question, what does the line in Kconfig refer to:

--------------------------
      older-style format.  See notes on tags formats and MTD versions.
--------------------------

Is there something written up on "tags formats and MTD versions"?
I'd love to read all about it if there is...

Thanks again for all of the help.

Rick