Hmmm, I doubt if it has a SCSI drive, they don't come in 20Gb sizes anyway. 19.2 would souind more like it for SCSI of that era.

It is probably a 20.4Gb/ 7,200rpm/ ATA66 IDE drive.

Get this utility:

http://www.auslogics.com/system-information/index.php

and check what you really have

SCSI dives are high end and fast performers. This machine is pretty mediocre.

It is intended for senior executives, receptionists and staff who are public facing, because it looks hi-tech and cool. These people don't actually need much in the way of performance. The looks are there as a fashion statement to the uneducated