SAS RAID10 vs. SATA RAID1, an unfair hdparm comparison
Posted July 13, 2007 at 07:07am in Computers
It really isn’t fair to compare these as they are two different configurations and drive types, but I thought it would be interesting to show what a difference there is. I was doing some tuning to our LAMP setup on a server and ran hdparm to see how the drives were performing. The first one listed is a local server of mine, 2.4ghz HT, Pentium 4 with 1gb DDR400 and dual 120gb SATA I drives in RAID1.
hdparm -t /dev/sda /dev/sda: Timing buffered disk reads: 156 MB in 3.02 seconds = 51.64 MB/sec
This one is the server in question, 4x 73GB SAS 10K drives in RAID10 with a Single Socket Dual Core Intel Xeon 5148 LV 2.33GHz.
hdparm -t /dev/sda /dev/sda: Timing buffered disk reads: 490 MB in 3.00 seconds = 163.30 MB/sec
I am officially impressed with SAS. I know how fast my drives are, my Raptor is pretty quick and I have used a RAID0 config that was getting about 100mb/sec, but that is just sick.
