S/W to benchmark SD cards?

[Chupa Chupa]

What OS X app would be good to benchmark SD cards? I have a couple different Class 10s and I'm curious what their actual speeds are.

 

[jabbott]

What OS X app would be good to benchmark SD cards? I have a couple different Class 10s and I'm curious what their actual speeds are.

You could try Xbench... It's old but it works. Just disable all benchmarks except for Disk Test, and set the volume to your SD card. I just ran it on my iMac i7 with a Transcend 32GB SD Class 6 card and got the following results:

Disk Test 1.51

Sequential 19.91

Uncached Write 17.45 10.71 MB/sec [4K blocks]
Uncached Write 16.48 9.32 MB/sec [256K blocks]
Uncached Read 17.68 5.18 MB/sec [4K blocks]
Uncached Read 37.93 19.06 MB/sec [256K blocks]​

Random 0.79

Uncached Write 0.21 0.02 MB/sec [4K blocks]
Uncached Write 3.48 1.12 MB/sec [256K blocks]
Uncached Read 671.88 4.76 MB/sec [4K blocks]
Uncached Read 102.40 19.00 MB/sec [256K blocks]​