root@blue:~# hdparm -Tt /dev/mmcblk0

/dev/mmcblk0:
Timing cached reads: 914 MB in 2.00 seconds = 456.96 MB/sec
Timing buffered disk reads: 2 MB in 4.73 seconds = 432.78 kB/sec
root@blue:~# dd if=/dev/zero of=/tmp/output bs=8k count=25k; sudo rm -f /tmp/output
25600+0 records in
25600+0 records out
209715200 bytes (210 MB) copied, 32.4008 s, 6.5 MB/s

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