ubi image only mounts once

[Artem Bityutskiy]

On Mon, Jun 6, 2011 at 9:31 PM, Douglass, Woody
<Woodrow.Douglass at qinetiq-na.com> wrote:
>
> Artem,
>
> Thanks, you're correct, subpages aren't working properly! First I tried applying this patch to solve the issue: https://patchwork.kernel.org/patch/749762/
>
> The test still fails. Next, I changed the -s argument to ubinize from 512 to 2048; I also added -s 2048 to my ubiformat arguments.
>
> Now, on boot, this happens:
>
> [  357.992767] UBI: attaching mtd4 to ubi0
> [  357.996673] UBI: physical eraseblock size:   131072 bytes (128 KiB)
> [  358.003631] UBI: logical eraseblock size:    129024 bytes
> [  358.009185] UBI: smallest flash I/O unit:    2048
> [  358.013916] UBI: sub-page size:              512
> [  358.018646] UBI: VID header offset:          512 (aligned 512)
> [  358.024505] UBI: data offset:                2048
> [  358.030639] UBI error: validate_ec_hdr: bad VID header offset 2048, expected 512
> [  358.038085] UBI error: validate_ec_hdr: bad EC header
> [  358.043426] UBI error: ubi_io_read_ec_hdr: validation failed for PEB 0
> [  358.050292] UBI error: ubi_init: cannot attach mtd4
> [  358.057708] UBI error: ubi_init: UBI error: cannot initialize UBI, error -22
>
> How can I re set the sub-page size?

Take a look here:
http://linux-mtd.infradead.org/faq/ubi.html#L_vid_offset_mismatch

Also modinfo ubi

If you attach UBI using the kernel boot parameters, use mtd=X,2048,
where X is your number.

--
Best Regards,
Artem Bityutskiy (Битюцкий Артём)