New 95MB/s SanDisk SD card. Results.

[Linux-SWAT]

Bought two 16G Extreme Pro 95MB/s SDSDXPA-016G-X46 coming from Taiwan.

First, it beat all my previous cards bandwidth, and even blasted the theoretical limit of 16MB/s.

And second, the results are different between my CC and my 1G. Don't know if it's a known fact.

Tested a lot, rebooted, both units clocked at 800MHz.

CC

Read Write

18.9  17.4

1G

Read Write

20      19.1

 

[WizardStan]

24M/s is the theoretical limit. 16M/s just seemed to be the max that we were getting.

 

[lunixbochs]

I get about 20 on my 45MB/s cards.

 

[Aether Lion]

Who needs a card with that much read/write speed? I think it is somewhat a waste of money than to just by the slightly cheaper ones that work flawless anyways, but that just may be me.

 

[elwing]

Who needs a card with that much read/write speed? I think it is somewhat a waste of money than to just by the slightly cheaper ones that work flawless anyways, but that just may be me.

someone with a dslr in addition of his pandora?

 

[Aether Lion]

Who needs a card with that much read/write speed? I think it is somewhat a waste of money than to just by the slightly cheaper ones that work flawless anyways, but that just may be me.

someone with a dslr in addition of his pandora?

Can someone translate that to English for me. >.<

 

[klapse]

A DSLR is a digital single lens reflex camera if i recall correctly.


A faster card would also be useful for people who run the OS on the SD.

 

[Aether Lion]

A DSLR is a digital single lens reflex camera if i recall correctly.


A faster card would also be useful for people who run the OS on the SD.

Yet wouldn't a class 10 be good enough for that? 

~Polukus~

 

[elwing]

guess it depends on the camera itself...

being able to take longer/faster burst might be important... when you already spend thousands $ on the camera and it's lens...

 

[ingoreis]

A faster Card is better for Qemu Windows Images,because the read/write Speed is important.

How find you out the real Speed of your SD in your Pandora?

Is there a Benchmark for such Things?

I thougt the Card Reader in the Pandora itself is Speed Limited.

Have you tried the same Cards in PC for testing too?

 

[EvilDragon]

And it's important if you run your OS from SD Card (like SL4P)

 

[Askarus]

Get an USB 2.0 SD-card reader.

This might increase read/write speed.

 

[Linux-SWAT]

I have a USB 3.0 card reader, and as i do a lot of copy/saves on my PC, i need fast SD cards.

On the OP, my "old" 45MB/s extreme pro was slower than the 30MB/s extreme.

 

[ingoreis]

A Pandora SD Card read/writing Software would be nice

 

[Linux-SWAT]

The test procedure is here:

http://pandorawiki.org/SD_compatibility_list

 

[Galaxis]

And second, the results are different between my CC and my 1G. Don't know if it's a known fact.

The SoC revision used in CC Pandoras had a bug which could lead to data corruption when copying between the two SD slots. As far as I know, the workaround was to throttle transfer speed in the driver. This isn't required with GC Pandoras anymore.

 

[laurencevde]

Can you also test the random(4k)-write-speed of all your cards? That's the only thing that'll show significant differences on the Pandora, and is quite important if used for the OS.

 

[Linux-SWAT]

How to do that ?

 

[laurencevde]

I wrote a small script a few years ago to test latencies, found here. It's not perfect, but will do the trick. 

For a more real-world benchmark, you can also check /sys/class/block/*/stat after using the card for a while. Divide the 8th number by the 7th to get the average wait-time per write, in ms/sector.

 

[Linux-SWAT]

Your script doesn't work.