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To: linux-mtd@lists.infradead.org
From: Andre Puschmann <andre.puschmann@stud.tu-ilmenau.de>
Subject: Re: Mounting mtd block device raises "Block device required"
Date: Wed, 11 Jun 2008 11:26:46 +0200
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Hi,

Hinko Kocevar wrote:
> Char device seems to work..

Yes, sorry for being not precise.
Coping a jffs2 image (in 2.6.25) at /dev/mtd5 and mouting the same one
in 2.6.21 (/dev/mtdblock5) works. So accessing the flash as a character
device works.

> What is the ls -l /dev/mtdblock5 output?

As expected:
$ ls -l /dev/mtdblock5
brw-rw----    1 root     root      31,   5 Jan  1  1970 /dev/mtdblock5


> Also could you try:
> mount -t jffs2 /dev/mtdblock5 /mnt/flash

I also tried that:

# mount -t jffs2 /dev/mtdblock5 /mnt/flash
mount: mounting /dev/mtdblock5 on /mnt/flash failed: Invalid argument


But it seems like it has to do something with the block device driver
mapping:

$ head -n 2 /dev/mtdblock5 | hexdump -C
head: /dev/mtdblock5: No such device or address


Thanks,
Andre