From: Artem Bityutskiy <dedekind1@gmail.com>
To: Atlant Schmidt <aschmidt@dekaresearch.com>
Cc: Scott Wood <scottwood@freescale.com>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
"Matthew L. Creech" <mlcreech@gmail.com>,
'Mike Hench' <mhench@elutions.com>
Subject: RE: NAND BBT corruption on MPC83xx
Date: Thu, 23 Jun 2011 11:31:25 +0300 [thread overview]
Message-ID: <1308817889.18119.98.camel@sauron> (raw)
In-Reply-To: <0A40042D85E7C84DB443060EC44B3FD32A7208F91B@dekaexchange07.deka.local>
On Mon, 2011-06-20 at 07:22 -0400, Atlant Schmidt wrote:
>
> As far as I know (and I'm sure the list will correct
> me if I'm wrong! ;-) ), neither UBI nor UBIFS nor any
> Linux layer provides this routine scrubbing; you have
> to code it up yourself, probably by accessing the
> device at the UBI (underlying block device/LEB) layer.
UBI will scrub all LEBs with bit-flips once they are read.
But if you have bit-flips in an LEB and it is never read, it will never
be scrubbed. And erasures of the neighboring PEBs may turn bit-flips
into hard errors.
To force scrubbing, the easies way is to just read all volumes, like
dd if=/dev/ubi0_i of=/dev/null bs=4096
for each i.
--
Best Regards,
Artem Bityutskiy
next prev parent reply other threads:[~2011-06-23 8:30 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-17 20:54 NAND BBT corruption on MPC83xx Matthew L. Creech
2011-06-17 21:34 ` Scott Wood
2011-06-18 17:55 ` Mike Hench
2011-06-20 11:22 ` Atlant Schmidt
2011-06-23 8:31 ` Artem Bityutskiy [this message]
2011-06-20 15:20 ` Matthew L. Creech
2011-07-05 19:58 ` Matthew L. Creech
2011-07-05 19:59 ` [PATCH] mtd: eLBC NAND: remove bogus ECC read-back Matthew L. Creech
2011-07-05 20:15 ` Scott Wood
2011-07-05 22:35 ` [PATCH v2] mtd: eLBC NAND: remove elbc_fcm_ctrl->oob_poi Matthew L. Creech
2011-07-05 23:01 ` Scott Wood
2011-07-05 23:14 ` Matthew L. Creech
2011-07-05 23:14 ` [PATCH v3] " Matthew L. Creech
2011-07-06 7:23 ` Artem Bityutskiy
2011-07-11 15:30 ` NAND BBT corruption on MPC83xx Matthew L. Creech
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1308817889.18119.98.camel@sauron \
--to=dedekind1@gmail.com \
--cc=aschmidt@dekaresearch.com \
--cc=linux-mtd@lists.infradead.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mhench@elutions.com \
--cc=mlcreech@gmail.com \
--cc=scottwood@freescale.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).