|About 15 years ago, I used a program called TestDrive from Microsystems Development. Sure don't know where to get it now though.|
On a whim, I called a friend who grew up working on this old stuff. He recalled a couple more programs:
Readiscope by Dysan and Disk Drive Analyzer by Verbatim.
I wonder if a drive will adjust that much? That would be 4% out of spec...never seen one that far out.