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12/30: I took the bad hard drive to the physics department office to be shipped via UPS.
12/30: I took the bad hard drive to the physics department office to be shipped via UPS.
I did more work on the computer. Like the old drive in the upper bay, the replacement drives had a parallel ATA interface. There is only one PATA channel on the motherboard with a single ribbon cable that needs to connect to both the replacement hard drive and the optical drive. At one end of the ribbon cable is a connector that sits in the PATA channel. Twelve inches from that connector is another connector that goes to a drive, and 18 inches from the first connector is the other end of the ribbon cable with another drive connector. Thus the two drive connectors on the ribbon cable are six inches apart. I fixed the PATA connector to the optical drive in the upper bay, but the other drive connector would reach only to the top position in the lower drive bay.