ATTO is another "quick and dirty" type of disk benchmark that measures transfer speeds across a specific volume length. It measures raw transfer rates for both reads and writes and graphs them out in an easily interpreted chart. We chose .5kb through 8192kb transfer sizes and a queue depth of 6 over a total max volume length of 256MB. ATTO's workloads are sequential in nature and measure bandwidth, rather than I/O response time, access latency, etc. This test was performed on blank, formatted drives with default NTFS partitions in Windows 7 x64.
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| ATTO Disk Benchmark |
| More Information Here: http://bit.ly/btuV6w |
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With the smallest of transfer sizes, the new WD Velociraptor 1TB offered middling performance in the ATTO read test, but once the transfer size exceeded the 4K mark, WD's new flagship hard drive blew past all of our reference drive and clearly led the pack. In the write test, the WD Velociraptor 1TB led across the board regardless of the transfer size.
