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Date: Tue, 21 Oct 2003 11:20:07 +0200
From: Martin Egholm Nielsen <martin@egholm-nielsen.dk>
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Subject: Mount-failure (jffs2_scan_empty()) mounting SmartMedia with jffs2
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Hi there,

I'm attempting to mount a jffs2-filesystem on a SmartMedia card but it's 
not quite successfull (read: it doesn't work at all).
Some info:

* On startup the kernel informs me of the following:
SmartMedia card inserted.
NAND device: Manufacture ID: 0xec, Chip ID: 0x75 (Samsung KM29U256T)

* The /proc/mtd contains the following:
dev:    size   erasesize  name
mtd0: 00200000 00010000 "Physically mapped flash"
mtd1: 00840000 00000420 "Atmel AT45DB642"
mtd2: 02000000 00004000 "Samsung KM29U256T"

i.e. the flash-device I'm trying to use is "mtd2".

* Running "eraseall /dev/mtd/2" works like a charm.

* I try to create a small filesystem with the command:
  mkfs.jffs2 --eraseblock=0x4000 --pad --root=/usr/adm --output=/tmp/image

* I copied the filesystem to the device: "cp /tmp/image /dev/mtd/2"

* ...and tried to mount it: "mount -t jffs2 /dev/mtdblock/2 /mnt/mtd"
but this is where the sky falls down - I get tons of messages like the 
following:
jffs2_scan_empty(): Empty block at 0x0000001c ends at 0x00000200 (with 
0x0000000
0)! Marking dirty
<%%%% SNIP %%%%>
Further such events for this erase block will not be printed
JFFS2: Erase block at 0x00000000 is not formatted. It will be erased

And now I'm lost... Any ideas of how to get any further?

Regards,
  Martin Egholm Nielsen