ATTO is a "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 raw 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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In the ATTO write test, the My Passport Edge actually delivered competitive scores up to the 16KB range before it planed out at just under 100MBps. The drive started slow on the read test, however, and stayed below the performance of the competition.