Re: Creating an Empty JFFS2 File System

Grant Erickson
2008-03-07T20:39:58Z

On 3/7/08 10:37 AM, Josh Boyer wrote:
> On Fri, 07 Mar 2008 09:55:13 -0800
> Grant Erickson <gerickson@nuovations.com> wrote:
>> Is creating an empty JFFS2 file system supported or is this a deprecated
>> capability? The following steps seem to be incorrect or failing:
>>
>> # flash_eraseall -q -j /dev/mtd9
>> # mount -t jffs2 /dev/mtdblock9 /mnt
>> Cowardly refusing to erase blocks on filesystem with no valid JFFS2
>> nodes
>> empty_blocks 0, bad_blocks 0, c->nr_blocks 3840
>>
>> Or, is the only way to accomplish this to create a NULL JFFS2 image with
>> mkfs.jffs2 and then nandwrite it?
>
> Just erase it completely without the -j option and mount. JFFS2 will go
> through and erase them all again and add the cleanmarkers itself.

Josh:

That technique is a no-go as well:

# flash_eraseall -q /dev/mtd8
# mount -t jffs2 /dev/mtdblock8 /mnt
Cowardly refusing to erase blocks on filesystem with no valid JFFS2
nodes
empty_blocks 0, bad_blocks 0, c->nr_blocks 3840
mount: mounting /dev/mtdblock8 on /mnt failed: Input/output error

Regards,

Grant