rickdallas
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Joined: Sat Mar 02, 2013 1:00 am

"Best" SD card for XBMC?

Sun Mar 03, 2013 2:07 am

Does anyone know what the specs are on the sd card reader on the PI? I'd like to know what the maximum speed sd card to get as I will trying to stream Blu-ray via XMBC and I'd like to get the fastest sd card that is not faster than the card reader can read. :mrgreen:

bboyandru
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Re: "Best" SD card for XBMC?

Wed Mar 06, 2013 12:20 pm

Hi!

Try to use some fast usb pen instead of the SD card. Use SD card just for /boot partition.
Here's a tutorial:
http://jonathanmh.com/boot-raspberry-pi ... usb-stick/

Andrei
http://www.engineering-diy.blogspot.com

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malakai
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Re: "Best" SD card for XBMC?

Wed Mar 06, 2013 12:24 pm

Typically it won't matter I have files on both the SD Card (I use 16gig class 4 cards) and on external Hard Drives I don't notice any difference between either being loaded. Most assume the only way to stream a 4+gig file is via a fast Card the true question is I want a device that is just as fast as media streaming or slightly faster than it can be streamed.
http://www.raspians.com - always looking for content feel free to ask to have it posted. Or sign up and message me to become a contributor to the site. Raspians is not affiliated with the Raspberry Pi Foundation. (RPi's + You = Raspians)

stick
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Re: "Best" SD card for XBMC?

Fri Mar 08, 2013 12:08 am

There were lots of posts from people testing various cards last year. I seem to remember that the sd card controller maxed out at 20 mb/s. That was with the original spec model B.

dom
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
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Re: "Best" SD card for XBMC?

Fri Mar 08, 2013 12:16 am

stick wrote:There were lots of posts from people testing various cards last year. I seem to remember that the sd card controller maxed out at 20 mb/s. That was with the original spec model B.
The default bus speed is 50MHz, and you get 4-bit per cycle, so theoretical maximum is 25MB/s. You probably won't achieve more than about 22MB/s due to overhead.

I have seen people overclocking the sdcard bus if you wan't to live dangerously.

But, headline max read or write speed (and so sdcard class) isn't what makes the system responsive, it is the random access 4K benchmark.
Sandisk cards tend to be good at that.

Assuming you are streaming Blu-rays from the network, then sdcard speed has little effect. Overclock, network settings (nfs with best options) and using audio passthough will have much more effect.
It does speed up the UI and browsing though. (And a USB install can help even more).

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