Contents

Revision Record………………………………………………………………..		vii
About This Guide………………………………………………………….…..		.ix
1 Introducing the DWZZH UltraSCSI Hub
1.1	UltraSCSI Hub Functions	1–1
1.2	Product Descriptions	1–2
1.2.1	DWZZH 3.5" SBB Hubs	1–2
1.2.2	DWZZH 5.25" SBB Hubs	1–4
1.2.3	SCSI Bus Components	1–4
1.3	Product Specifications	1–5
2 Using the DWZZH UltraSCSI Hub
2.1	Large Hub Fair Arbitration	2–1
2.2	Large Hub Addressing Configurations	2–2
2.3	Narrow Addressing Setting	2–3
2.4	Front Panel	2–6
2.4.1	Fair Arb Disable	2–6
2.4.2	Indicators	2–7
2.5	Determining the Configuration	2–7
2.6	Selecting the SCSI Cables	2–7
2.7	Placement of UltlraSCSI Hubs	2–7
3 SWCC and UltraSCSI Hubs		3–1
Glossary
Figures
1–1 DWZZH–21 or DWZZH-03 3.5" SBB Hub		1–2
1–2	DWZZH–21 Front Panel	1–3
1–3	DWZZH–03 Front Panel	1–3
1–4	DWZZH–05 5.25" SBB Hub	1–4
2–1 DWZZH–05 SCSI ID Assignments		2–3
2–2 DWZZH–05 SCSI Narrow ID Assignments		2–4
2–3 DWZZH–05 SCSI Narrow Addressing Jumper		2–5
2–4 DWZZH–05 SCSI Front Panel		2–6

EK–DWZZH–UG. D01

Figures