Motorola MPMC101 Connecting to the Scsi Bus, Connector and Cable Requirements, Single-ended

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Connecting to the SCSI Bus

Connecting to the SCSI Bus

You are now ready to connect the adapter to the SCSI bus.

Table 2-3. Connector and Cable Requirements

Connectors	68-pin Euro style SCSI:
	Shielded - external or internal cabinet
	applications
	Non-shielded- internal cabinet
	applications only

Bus Cable	68-conductor, flat ribbon or discrete:
	Single-ended:
	Type - Twisted pair only
	Shielding - match with connector
	Max bus length - 6 meters
	Differential:
	Type - twisted pair only
	Shielding - match with connector
	Max bus length - 25 meters

Single-ended and differential SCSI devices are

! electronically incompatible and cannot be mixed on the

Caution same physical bus. Mixing single-ended and differential SCSI devices on the same bus can cause permanent damage to both the peripherals and the PCI adapter.

Cables of different impedance should not be mixed on

! the same physical bus.

Caution

2

2-13

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Contents PMC SCSI-2 Adapter User’s Manual MPMC101Restricted Rights Legend Preface Related Documentation Acronyms and Terminology Conventions Safety Summary Safety Depends On You Page Contents List of Figures List of Tables Xii PCI SCSI-2 Adapter Adapter OverviewProduct Features System Requirements Supported Software DriversPCI Overview Single Initiator, Single Target Systems Introduction to SCSI-2Target with Multiple Peripherals Multiple Device Conﬁguration Introduction Tools Required OverviewUnpacking the Adapter Installing the PCI SCSI-2 Adapter Desktop PCI Slot Conﬁguration Single-ended PCI Adapter Jumper Setting PCI SCSI-2 Adapter Jumper SettingsInserting the PCI Adapter Card Adapter Card Installed to Chassis Differential PMC SCSI-2 Adapter Installing the PMC SCSI-2 Adapter Installing the PMC Adapter Installing the PMC SCSI-2 Adapter JA4 PMC SCSI-2 Adapter Jumper SettingsConnector and Cable Requirements Connecting to the Scsi BusSingle-ended Differential10. Scsi Connector Port AIX Operating Systems Software Driver InstallationWindows NT Operating Systems Windows NT SetupScsi Adapter Setup Setup Message Installed Adapter Listing Restart Message Start-up Problems Problem Possible Solution Computer willStart-up Bootup Problems Boot-upPCI and PMC Adapter Problem Application ProblemsApplications PCI and PMC AdapterUser Notes Hardware Table A-1. PCI and PMC Adapter SpeciﬁcationsSpeciÞcation Table A-3. Connector and Cable Requirements Connectors and CablesEnvironment Table A-2. Environmental SpeciﬁcationsConnector Cable Signal Contact Conductor Name Number Scsi P Cable Contact AssignmentsTable A-4. Single-ended Contact Assignments Table A-5. Differential Contact Assignments CCB Command Control Block Bus Device ResetAdapter Ansi American National Standards InstituteCDB Command Descriptor Block CCS Command Control SetDMA Direct Memory Access CPU Central Processing UnitEIA Electronic Industries Association DriverEisa Expanded Industry Standard Architecture EncodeIeee Institute of Electrical and Electronic Engineers Host nameInitiator InteroperabilityLocal bus LocalLog LU Logical UnitRAM Random Access Memory Propagation delayPCI Peripheral Component Interconnect Point-to-pointSingle-threaded Single-endedSynchronous transmission TargetPage Index PCI IN-11