Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B 1
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1.0 Scope
This specification describes the Seagate Technology, Inc. Hawk 2 Model ST12400 Disc Drive. This high capacity,
high performance member of the Seagate 3.5 inch rigid disc family has a new HDA (Head/Disc Assembly) design
having improvements over previous 3.5-inch Seagate models. It has an embedded SCSI controller. Performance
information is given in Section 5. The Hawk 2 Family Model ST12400 drive interface is defined for functional
compatibility to a subset of the Seagate SCSI-2 Interface Specification 77738479, and the ANSI SCSI-2 stan-
dard. The Hawk 2 Family drives are classified as “Intelligent” peripherals. The Hawk 2 Family provides Level 2
conformance (highest level) with the ANSI SCSI-1 standard. Details of the Hawk 2 Family drive SCSI implemen-
tation are provided in Section 11 of this specification, (Vol. 1) and in the SCSI-2/SCSI-3 Interface Product Manual
P/N 77738479 (Vol. 2; Ver. 2).
The Hawk 2 family of drives consists of the ST12400N/ND/NC and ST11900N/ND/NC drives.
From this point on in this Product Manual the reference to Hawk 2 Family is referred to as “the drive” (unless
reference to individual models are necessary).
The drive printed circuit board is referred to as a PCB.
Figure 1-1. Hwk 2 family drive
SEAGATE
50 pin SCSI I/O and 4 pin DC power connector shown. "NC" drive models have a
single 80 pin connector and no separate DC power connector.
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