# hdparm -tT /dev/{sd{a,b,c,d,e,f},md1}
/dev/sda:
Timing cached reads: 20076 MB in 1.99 seconds = 10063.61 MB/sec
Timing buffered disk reads: 376 MB in 3.01 seconds = 125.12 MB/sec
/dev/sdb:
Timing cached reads: 21944 MB in 1.99 seconds = 11001.30 MB/sec
Timing buffered disk reads: 378 MB in 3.02 seconds = 125.36 MB/sec
/dev/sdc:
Timing cached reads: 20116 MB in 2.00 seconds = 10082.27 MB/sec
Timing buffered disk reads: 376 MB in 3.00 seconds = 125.28 MB/sec
/dev/sdd:
Timing cached reads: 20992 MB in 1.99 seconds = 10522.85 MB/sec
Timing buffered disk reads: 376 MB in 3.00 seconds = 125.25 MB/sec
/dev/sde:
Timing cached reads: 19760 MB in 1.99 seconds = 9904.86 MB/sec
Timing buffered disk reads: 376 MB in 3.01 seconds = 124.96 MB/sec
/dev/sdf:
Timing cached reads: 20588 MB in 1.99 seconds = 10320.11 MB/sec
Timing buffered disk reads: 378 MB in 3.01 seconds = 125.40 MB/sec
/dev/md1:
Timing cached reads: 22024 MB in 1.99 seconds = 11042.53 MB/sec
Timing buffered disk reads: 1452 MB in 3.00 seconds = 483.54 MB/sec

HDDは15k.5の300GBx6
SAS RAIDコントローラは LSI 1068E
(っつーてもRAID機能は殺してHBAとしてlinuxのmdでRAID5を構成)