I've experienced some strange events on my computer and I thought the first thing I'd do is run some disk diagnositc tools. I have five physical disks:
C: system/program disk
D: backup of C
E: data disk
F: backup of E
G: Spare disk ... using as 2nd backup of C
Since C & D are Western Digital devices, I downloaded one of their LifeGuard Diagnostics: DLGDIAG for Windows, and ran the "Extended Test" against C, D, and G. All passed. The control panel says that SMART status is not available -- I forgot how to turn that on (as far as I know, it should work with all five drives).
Any hints on a more demanding disk test that would not wipe the disk clean ... I do not want to have to reinstall my software because of the test. For what it is worth, I'm using Acronis True Image to make image copies of C to D and G.