From: Ivan Djelic <ivan.djelic@parrot.com>
To: Ricard Wanderlof <ricard.wanderlof@axis.com>
Cc: "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
"Jean-Sébastien Gagnon" <jsgagnon@vizimax.com>
Subject: Re: UBIFS recovery fails
Date: Wed, 19 Oct 2011 12:22:35 +0200 [thread overview]
Message-ID: <20111019102235.GA13501@parrot.com> (raw)
In-Reply-To: <Pine.LNX.4.64.1110190845390.30940@lnxricardw.se.axis.com>
On Wed, Oct 19, 2011 at 07:50:42AM +0100, Ricard Wanderlof wrote:
> That said, it seems to me that power failure during write causing
> excessive bitflips would be a problem with any flash, not just MLC or
> modern "unstable" SLC. Ivan, you said you've only seen it with modern
> flashes, not older SLC ?
Excessive bitflips after a power failure happen on all types of flash (SLC,
MLC, even NOR flash); it is an expected possible consequence of the power cut.
It is not really a problem as long as what you read in flash is _stable_.
On modern SLCs (at least I first saw it on 34 nm SLC flash), those bitflips
can be _unstable_, i.e. they can appear and disappear randomly as you read
pages. I experienced this phenomenon only on pages which were being programmed
or erased during a power cut.
BR,
--
Ivan
next prev parent reply other threads:[~2011-10-19 10:22 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-17 13:29 UBIFS recovery fails Daniel Kuhn
2011-10-17 20:17 ` Artem Bityutskiy
2011-10-18 8:11 ` Ricard Wanderlof
2011-10-18 8:42 ` Ivan Djelic
2011-10-20 16:37 ` Artem Bityutskiy
2011-10-20 16:36 ` Artem Bityutskiy
2011-10-18 8:29 ` Ivan Djelic
2011-10-19 15:15 ` Artem Bityutskiy
2011-10-19 17:27 ` Ivan Djelic
2011-10-18 12:47 ` Jean-Sébastien Gagnon
2011-10-18 14:54 ` Ivan Djelic
2011-10-18 15:10 ` Jean-Sébastien Gagnon
2011-10-18 15:32 ` Ivan Djelic
2011-10-18 16:05 ` Jean-Sébastien Gagnon
2011-10-19 6:50 ` Ricard Wanderlof
2011-10-19 10:22 ` Ivan Djelic [this message]
2011-10-19 12:17 ` Atlant Schmidt
2011-10-19 12:52 ` Ricard Wanderlof
2011-10-19 13:30 ` Atlant Schmidt
2011-10-20 16:43 ` Artem Bityutskiy
2011-10-24 7:00 ` Ricard Wanderlof
2011-10-29 19:43 ` Artem Bityutskiy
2011-10-20 14:14 ` Artem Bityutskiy
2011-10-18 15:29 ` Daniel Kuhn
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=20111019102235.GA13501@parrot.com \
--to=ivan.djelic@parrot.com \
--cc=jsgagnon@vizimax.com \
--cc=linux-mtd@lists.infradead.org \
--cc=ricard.wanderlof@axis.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.