Hey Scott,
I want to hear more about your hardware setup. Tell us about your primary drive (the C: drive)...Model, size, etc. Do you know if it is a UDMA drive (Ultra DMA)? If so, are you using an 80-pin IDE cable? Are your BIOS settings correct for UDMA? Is the second drive in question a UDMA drive? What cable or IDE channel is it on? Why "F" and "G"? Tell us about "D" and "E" (other partitions on the primary or CD-ROM drives).
Like Dreamer says, remove the IDE cable from the secondary drive and report back your findings.
mike