From: Arnd Bergmann <arnd@arndb.de>
To: Patrick Fu <Patrick.Fu@atheros.com>
Cc: "Robert P. J. Day" <rpjday@crashcourse.ca>,
"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>
Subject: Re: why would an SD card, after 12 hours, start to fail recording video?
Date: Thu, 26 May 2011 08:01:22 +0200 [thread overview]
Message-ID: <201105260801.22805.arnd@arndb.de> (raw)
In-Reply-To: <6AAC4214B9104E409FF4885ACB62A96101A78AD977@SHEXMB-01.global.atheros.com>
On Thursday 26 May 2011, Patrick Fu wrote:
> > There are many reasons why this could happen:
> >
> > * You used a Kingston (or other cheap) SD card with a file system other
> > than FAT32
> >
>
> I'm just curious. How could this thing (file system type) affect read/write operations?
> Could you explain it a little?
>
See my article at https://lwn.net/Articles/428584/ and the survey at https://wiki.linaro.org/WorkingGroups/Kernel/Projects/FlashCardSurvey.
Many cheap cards are designed for a very specific file system layout. If you
do something else, you can have orders of magnitude higher write amplification.
Arnd
prev parent reply other threads:[~2011-05-26 6:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-24 17:11 why would an SD card, after 12 hours, start to fail recording video? Robert P. J. Day
2011-05-24 19:24 ` Arnd Bergmann
2011-05-24 20:03 ` Robert P. J. Day
2011-05-26 4:50 ` Patrick Fu
2011-05-26 6:01 ` Arnd Bergmann [this message]
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=201105260801.22805.arnd@arndb.de \
--to=arnd@arndb.de \
--cc=Patrick.Fu@atheros.com \
--cc=linux-mmc@vger.kernel.org \
--cc=rpjday@crashcourse.ca \
/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.