ATTO Disk Benchmark is perhaps one of the oldest benchmarks going and is definitely the main staple for manufacturer performance specifications. ATTO uses RAW or compressible data and, for our benchmarks, we use a set length of 256mb and test both the read and write performance of various transfer sizes ranging from 0.5 to 8192kb. Manufacturers prefer this method of testing as it deals with raw (compressible) data rather than random (includes incompressible data) which, although more realistic, results in lower performance results.
OCZ Z-DRIVE R4 C SERIES PCI EXPRESS 1.6TB SSD
We need to keep in mind that ATTO tests with compressible data. This results in the highest performance result possible which is why it is preferred by manufacturers to determine product specifications. Experienced data storage managers will understand that knowledge of their own server environment is a key factor in understanding the proper storage device to purchase for that system.
Having said that, the Z-R4 results of 2.87GB read and 2.81 GB write performance easily surpass that of the 1.62GB/s read and 1GB/s write results of the io-D (when testing compressible data) and both results do match that of their product specifications. An absolutely incredible thought is that the Z-Drive doubles this score with the addition of another of OCZs proprietary Superscale Storage Controller.