Can anyone tell me what the Hard drive S.M.A.R.T capability is, and whether I should have it enabled or disabled. Thanks

From the Western Digital Knowledge base (query "smart") http://wdc.custhelp.com/cgi-bin/wdc.cfg/php/enduser/search_alp.php " Question What is S.M.A.R.T. and S.M.A.R.T. failure? Answer S.M.A.R.T. is an acronym Self Monitoring Analysis and Reporting Technology. It is used to perform a quick analysis of the hard drive for problems during system boot up. It does not fix the problems. If a problem is encountered, you can use DLG Diagnostic utility to perform a more detailed analysis of the hard drive. All WD EIDE drives are compatible with S.M.A.R.T. version 2.0. Older versions of S.M.A.R.T. in the BIOS may cause problems in your hard drive. If you have an older version of S.M.A.R.T. in the BIOS and it reports problems with your drive, you can disable it within the BIOS or contact the BIOS manufacturer for an updated BIOS revision. " In all cases in which there is no conflict, S.M.A.R.T. alerts you of a failing hard disk drive. More information can be found here: http://www.pcguide.com/ref/hdd/perf/qual/featuresSMART-c.html

Thanks very much, this explains a lot.

In case you missed it: The free program HDD Health gives SMART information on your hard drive.