From: "H. Peter Anvin" <hpa@zytor.com>
To: Theodore Tso <tytso@mit.edu>, "H. Peter Anvin" <hpa@zytor.com>,
Pavel Machek <pavel@suse.cz>,
kernel list <linux-kernel@vger.kernel.org>
Subject: Re: SD/MMC cards: how crappy they are?
Date: Tue, 02 Dec 2008 09:59:42 -0800 [thread overview]
Message-ID: <4935778E.1020405@zytor.com> (raw)
In-Reply-To: <20081202165608.GD18162@mit.edu>
Theodore Tso wrote:
>
> If this is your random eject out from your HP laptop problem, note
> that random ejects while the card is writing can cause corruption of
> the flash translation layer (FTL), which for some really crappy cards,
> can permanently damage them; hopefully most of those are gone from the
> market, but I wouldn't be positive about that. The better ones will
> have some kind of journalling scheme for their FTL...
>
I have seen flash cards die permanently from having a partition table it
didn't like written to it. Yes, the microcontroller on the flash card
tried to interpret the partition table, assumed to be MS-DOS style, and
would crash.
-hpa
next prev parent reply other threads:[~2008-12-02 18:00 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-02 14:48 SD/MMC cards: how crappy they are? Pavel Machek
2008-12-02 16:30 ` H. Peter Anvin
2008-12-02 16:56 ` Theodore Tso
2008-12-02 17:59 ` H. Peter Anvin [this message]
2008-12-04 10:32 ` Pavel Machek
2008-12-04 19:03 ` H. Peter Anvin
2008-12-26 21:46 ` Pavel Machek
2008-12-26 21:49 ` H. Peter Anvin
2008-12-26 22:39 ` Pavel Machek
2008-12-27 1:03 ` Ben Pfaff
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=4935778E.1020405@zytor.com \
--to=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=pavel@suse.cz \
--cc=tytso@mit.edu \
/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