EFD Software's HD Tune is described on the company's web site as such: "HD Tune is a hard disk utility with many functions. It can be used to measure the drive's performance, scan for errors, check the health status (S.M.A.R.T.), securely erase all data and much more." The latest version of the benchmark added temperature statistics and improved support for SSDs, among a few other updates and fixes.
The Plextor M6e and M6e Black Edition took a bit of a beating in the HD Tune benchmark. Access times and Burst rates were very good, but average transfer rates trailed the SATA drives.