IBM Aptiva 2142 - Manual (Page 105)

Zip Drive
The factory installed Zip drive operates in the same manner as a hard drive.
The Zip drive, in the Setup Utility, will display as a hard disk drive with a
capacity of 100 MB.
The Zip drive is jumpered as Master. See “Zip Drive” on page 5-14 for
jumper settings. The following drive initialization information must be
entered in the CMOS only when configuring the Zip drive as the boot drive.
Cylinders = 512
Heads = 12
Sectors per Track = 32
Check Procedures 2-49