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Centos 5.4 software raid0 (mdadm) falcon 128GBx2 firmware 1571
[root@localhost ~]# hdparm -t /dev/md0
/dev/md0:
Timing buffered disk reads: 1522 MB in 3.00 seconds = 506.85 MB/sec
[root@localhost ~]# hdparm -t --direct /dev/md0
/dev/md0:
Timing O_DIRECT disk reads: 1404 MB in 3.00 seconds = 467.57 MB/sec
[root@localhost ~]# hdparm -t /dev/md0
/dev/md0:
Timing buffered disk reads: 1522 MB in 3.00 seconds = 506.85 MB/sec
[root@localhost ~]# hdparm -t --direct /dev/md0
/dev/md0:
Timing O_DIRECT disk reads: 1404 MB in 3.00 seconds = 467.57 MB/sec