20 MB Internal Hard Drive (250-1041)  Settings         Faxback Doc. # 4961

* The 20 MB Hard Disk Drive is a half-height Winchester fixed-disk drive.

* The 20 MB Hard Disk Drive interface is compatible with the Seagate
  ST506/ST412 standard interface.

* Can operate at temperatures from 50 to 113`F with 8 to 80% non-condensing
  humidity.

* The standard Drive Select setting set at the factory configures the 20 MB
  Hard Disk Drive as the first (primary) disk drive. The standard Terminator
  setting configures the Hard Disk Drive as the terminal disk drive. Possible
  pin settings for the 20 MB Hard Disk Drive are shown in the following
  chart.

SEAGATE MODEL ST-225

This disk drive has eight pairs of pins. The first four sets of pins are for
Drive Select. Jumper one of these pairs to configure the hard disk as Drive
1,2,3 or 4 (C,D,E or F), respectively.

NOTE: The third and fourth sets of pins provide hardware support for a third
and fourth hard disk. The Hard Disk Controller board (250-4060) for your
computer does not support more than two hard disk drives.

The last four pairs of pins are not used.

This drive includes a Terminator Resistor on the bottom of the unit for drive
termination. Be sure the resistor is installed to configure the hard disk as
the terminal drive. Remove the resistor to use the 20 MB Hard Disk as a
non-terminal drive.

(css 07/29/93)