sun:~# cat /proc/cpuinfo
cpu             : TI UltraSparc II  (BlackBird)
fpu             : UltraSparc II integrated FPU
prom            : OBP 3.23.1 1999/07/16 12:08
type            : sun4u
ncpus probed    : 2
ncpus active    : 2
D$ parity tl1   : 0
I$ parity tl1   : 0
Cpu0ClkTck      : 000000001ad2f383
Cpu2ClkTck      : 000000001ad2f383
MMU Type        : Spitfire
State:
CPU0:           online
CPU2:           online

sun:~# hdparm -tT /dev/md0

/dev/md0:
 Timing O_DIRECT cached reads:   562 MB in  2.00 seconds = 280.92 MB/sec
 Timing O_DIRECT disk reads:   76 MB in  3.00 seconds =  25.33 MB/sec
sun:~# hdparm -tT /dev/sda

/dev/sda:
 Timing O_DIRECT cached reads:   588 MB in  2.00 seconds = 294.18 MB/sec
 Timing O_DIRECT disk reads:   76 MB in  3.06 seconds =  24.81 MB/sec
sun:~# hdparm -tT /dev/sdb

/dev/sdb:
 Timing O_DIRECT cached reads:   560 MB in  2.00 seconds = 280.10 MB/sec
 Timing O_DIRECT disk reads:   78 MB in  3.03 seconds =  25.73 MB/sec