/dev/sdb:
 Timing cached reads:   1446 MB in  2.00 seconds = 722.61 MB/sec
 Timing buffered disk reads:  184 MB in  3.02 seconds =  60.97 MB/sec

/dev/sda:
 Timing cached reads:   1428 MB in  2.00 seconds = 713.53 MB/sec
 Timing buffered disk reads:   60 MB in  3.10 seconds =  19.36 MB/sec

/dev/scd0:
 Timing cached reads:   1436 MB in  2.00 seconds = 718.10 MB/sec
 Timing buffered disk reads:   22 MB in  3.19 seconds =   6.90 MB/sec

/dev/scd1:
 Timing cached reads:   1262 MB in  2.00 seconds = 631.05 MB/sec
 Timing buffered disk reads:   10 MB in  3.01 seconds =   3.33 MB/sec