IGT-20 microSD Access Speed

IGT-20 provides dual microSD slots and supports up to SDHC. Read/Write test has been performed with the default 8GB MLC microSD. Here's the methodology and test result:

Reading the microSD

root@igt20:~# hdparm -tT /dev/mmcblk0

 Timing cached reads:   474 MB in  2.00 seconds = 237.00 MB/sec
 Timing buffered disk reads:  62 MB in  3.07 seconds =  20.21 MB/sec

Writing the microSD

root@igt20:~# dd if=/dev/zero of=/media/512M bs=512M count=1
1+0 records in
1+0 records out
536870912 bytes (537 MB) copied, 48.1249 s, 11.2 MB/s