If all went well then the computer re-booted from the floppy drive, starting the Data Lifeguard Diagnostics utility. This utility is available from the Western Digital Software Library page. I'm using the "DOS (floppy)" version for a "first generation Serial ATA WD Caviar" hard drive. After the utility loads and after accepting the licensing agreement, the main menu screen appears and looks something like this. Click on the picture to see it enlarged.
The Data Lifeguard Diagnostic utility offers several tests and I ran all the ones that looked relevant. First I ran the "Quick Test". It took two minutes and finished successfully. Second I ran the "Extended Test" which took 46 minutes and also finished successfully. These first two tests are read-only tests, so they make no changes to the hard drive.
The next two tests are available under the "Write Zeros To Disk" option. The "Write Zeros To Disk" tests do write to the hard drive so any previous contents are overwritten. Since the hard drive is blank as far as I'm concerned, that's ok by me. After selecting the "Write Zeros To Disk" test, two options are presented. One is to do a "Quick Erase", which writes to a small portion of the hard drive. The other is to do a "Full Erase", which writes to the entire hard drive. The "Quick Erase" test took less than a minute and finished successfully. Finally I selected the "Full Erase" to check out the entire hard drive. This took about 90 minutes to complete and also finished successfully. The new hard drive is "good".
Choosing to "Quit" the Data Lifeguard Diagnostic utility takes you to a point where a message is displayed that says "The system must be reset - hit Ctrl-Alt-Delete or turn the power off". Remove the floppy disk containing the Data Lifeguard Diagnostic utility from the floppy drive.
Congratulations! The second boot test has completed successfully! Both the floppy drive and hard drive have been well exercised by this test. The optical drive was detected as we could see while in the BIOS and that's enough for now.
Common Problems
If the Data Lifeguard Diagnostic utility reports a failure as a result of any of its tests then the most likely reason is a bad hard drive. Although that's bad news it's certainly better to find out now, and was actually the point of running the test.
If the Data Lifeguard Diagnostic tests seem to be taking way longer than they should, like 16 hours for the "Full Erase", or appear to be stuck then the most likely reason is that the BIOS settings for the hard drive are not correct. See the BIOS settings listed under Integrated Peripherals on the Computer Assembly - Configure The BIOS Parameter Settings page.