RAID Performance Benchmark Tests

Many techies often extol the virtues of RAID 1 over RAID 5 and RAID 10 over all others.  While taking information from forums is a great source of learning, I needed to ‘see’ some figures for myself.  Luckily we had just taken delivery of a brand new Dell PowerEdge T320 with PERC H710 RAID Controller.  So before I prep it for delivery to the customer let’s get testing.

To test disk throughput I settled on CrystalDiskMark from http://crystalmark.info because I wanted an app that was lightweight, run from USB and reliable.

Next I needed a benchmark.  Numbers are meaningless to me unless I have something to compare them with.  So I chose my desktop PC for the benchmark.  My desktop PC is a HP elite business desktop with Hitachi HDS721010DLE630, 7,200 RPM, SATA/600, 1 TB Hard Disk.

Desktop PC – 1TB, SATA 7,200rpm


Great, now I have my benchmark I can set to work testing our swanky new server….


RAID 1 (2 x 1TB NL-SAS 7,200)

With Read Ahead and Write Back disabled


With Read Ahead enabled, Write Back disabled


With Read Ahead AND Write Back enabled



RAID 5 (3 x 1TB NL-SAS 7,200)

With Read Ahead and Write Back disabled



RAID 10 (4 x 1TB NL-SAS 7,200)

With Read Ahead and Write Back disabled


With Read Ahead enabled, Write Back disabled


With Read Ahead AND Write Back enabled




So, to summarise, RAID 10 really does have better performance!


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