trust:~# hdparm -t /dev/hd[e-g] /dev/sd[a-d]

/dev/hde:
 Timing buffered disk reads:  204 MB in  3.02 seconds =  67.50 MB/sec

/dev/hdf:
 Timing buffered disk reads:  212 MB in  3.02 seconds =  70.26 MB/sec

/dev/hdg:
 Timing buffered disk reads:  214 MB in  3.02 seconds =  70.90 MB/sec

/dev/sda:
 Timing buffered disk reads:  206 MB in  3.02 seconds =  68.31 MB/sec

/dev/sdb:
 Timing buffered disk reads:  160 MB in  3.03 seconds =  52.78 MB/sec

/dev/sdc:
 Timing buffered disk reads:  164 MB in  3.01 seconds =  54.50 MB/sec

/dev/sdd:
 Timing buffered disk reads:  214 MB in  3.03 seconds =  70.59 MB/sec