This chart clearly shows how beautifully the RAID arrays scale when drives are added. However, the throughput stops increasing as you reach 5 hard drives in RAID 0. Obviously, some component of our test system - either the RAID controller or the motherboard - created a bottleneck for our 6, 7 and 8 drive arrays. In theory, the PCI Express x4 interface should be capable of transporting 1 GB/s.
Write Transfer Rates
Write transfer rate is clearly below the maximum results of the read transfer rates test. Obviously, this controller cannot handle write speeds higher than 275 MB/s.
- RAID Testing With 2-8 Drives
- RAID Modes Explained
- RAID 1: Mirroring (High Safety)
- RAID 0+1: Mirrored Stripe Set (Performance & Data Safety)
- Test System
- Test Hard Drives: Samsung SpinPoint T166, HD321KJ (320 GB)
- Controller: Areca ARC-1220
- Test Setup
- Benchmark Results
- Read Transfer Rates
- I/O Performance (RAID 0)
- I/O Performance (RAID 0+1)