HDD: # hdparm -t /dev/hda /dev/hda: Timing buffered disk reads: 32MB in 2.96 secs = 10.81 MB/sec
USB Flash: # hdparm -t /dev/sda /dev/sda: TIming buffered disk reads: 32MB in 34.22 secs = 0.94 MB/sec
RAM: # time dd if=/dev/zero of=/dev/shm/test bs=1k count=32768 ＃RAM 32768+0 records in 32768+0 records out real 0m0.495s # echo -e "scale=2 \n 32/0.495" | bc 64.64
CF # hdparm -t /dev/hde /dev/hde: Timing buffered disk reads: 32MB in 27.43 secs = 1.17MB/sec
