Hi Rodolfo,<div><br></div><div>I think the idea is to use it as a storage device.</div><div><br></div><div>Christoph<br><br><div class="gmail_quote">On Fri, Mar 25, 2011 at 12:56 AM, Rodolfo D. Arce S. <span dir="ltr"><<a href="mailto:rodolfo.arce.s@gmail.com">rodolfo.arce.s@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Christoph:<br><br>You're talking about running the OS from the card?<br><br>Because you could use it as an external drive only. But I'm gessing that if you take I/O into account you're going for the first option<br>
<br>R<br><br><br><div class="gmail_quote"><div><div></div><div class="h5">2011/3/24 Christoph Derndorfer <span dir="ltr"><<a href="mailto:christoph.derndorfer@gmail.com" target="_blank">christoph.derndorfer@gmail.com</a>></span><br>
</div></div><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex"><div><div></div><div class="h5">
Scott, Arnd,<div><br></div><div>thanks a lot for your comments and suggestions, much appreciated! :-)</div><div><br></div><div>Cheers,<br>Christoph<br><br><div class="gmail_quote">On Thu, Mar 24, 2011 at 10:36 PM, Arnd Bergmann <span dir="ltr"><<a href="mailto:arnd@arndb.de" target="_blank">arnd@arndb.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex"><div>On Thursday 24 March 2011 20:26:05 Christoph Derndorfer wrote:<br>
> Hi all,<br>
><br>
> the folks from the Austrian pilot project want to equip the XO-1s there with<br>
> SD cards. Are there any restrictions wrt size, speed, etc. that they should<br>
> be aware of when purchasing the SD cards? I'm particularly asking after<br>
> reading James' mention of seeing more issues with newer cards and the XO-1<br>
> power off bug.<br>
><br>
> Or asked the other way 'round: Are there any particular cards or<br>
> manufacturers which people can recommend?<br>
<br>
</div>Have a look at my list at <a href="https://wiki.linaro.org/WorkingGroups/KernelConsolidation/Projects/FlashCardSurvey" target="_blank">https://wiki.linaro.org/WorkingGroups/KernelConsolidation/Projects/FlashCardSurvey</a><br>
<br>
Stay away from brands that typically have only one writable allocation<br>
unit, these will be slow and wear out very quickly when formatted with ext3<br>
or other Linux file systems. Higher is better here, and it's something that<br>
is usually not reflected in the speed class rating. Also avoid those that only<br>
support linear I/O.<br>
<br>
Sandisk cards tend to be ok (especially the Ultra and Extreme versions),<br>
Kingston tends to be really bad, most others have somewhat mixed results<br>
though sometimes the cheapest ones can be really good.<br>
<br>
Class 10 cards are not required to support efficient random I/O, so they are<br>
sometimes slower than Class 6 cards from the same manufacturer.<br>
<br>
If you buy a sample, I'll gladly help you figure out if it's any good before<br>
you buy a lot of them, in return for more data for my survey page ;-).<br>
<font color="#888888"><br>
Arnd<br>
</font></blockquote></div><br><br clear="all"><br>-- <br>Christoph Derndorfer<br>co-editor, olpcnews<br>url: <a href="http://www.olpcnews.com" target="_blank">www.olpcnews.com</a><br>e-mail: <a href="mailto:christoph@olpcnews.com" target="_blank">christoph@olpcnews.com</a><br>
</div>
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<br></blockquote></div><font color="#888888"><br><br clear="all"><br>-- <br><b>Rodolfo D. Arce S.</b><br>web: <a href="http://rodolfoarce.com" target="_blank">rodolfoarce.com</a><br>twitter: <a href="http://twitter.com/rodolfoarces" target="_blank">@rodolfoarces</a><br>
<br><br><br>
</font></blockquote></div><br><br clear="all"><br>-- <br>Christoph Derndorfer<br>co-editor, olpcnews<br>url: <a href="http://www.olpcnews.com">www.olpcnews.com</a><br>e-mail: <a href="mailto:christoph@olpcnews.com">christoph@olpcnews.com</a><br>
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