LSI Logic 20860 - Manuals

Contents vii Contents Chapter 1 Using the LSI20860 1.1 General Description 1-1 1.1.1 Features 1-1 1.1.2 Physical Environment 1-3 1.2 Installing the LSI20860 1-5 1.3 Connecting SCSI Devices 1-7 1.3.1 Internal SCSI Bus Connections 1-8 1.3.2 External SCSI Bus Connections 1-9 1.3.3 SCSI Bus Termination ...

LSI20860 PCI to Ultra SCSI Host Adapter 1-1 Chapter 1Using theLSI20860 This chapter contains instructions and illustrations to help you install aLSI20860 PCI to Ultra SCSI host adapter board into a PCI computersystem. It includes these topics: • Section 1.1, “General Description,” page 1-1 • Section...

1-4 Using the LSI20860 The component height on the top and bottom of the board conforms tothe PCI Specification. 1.1.2.2 Electrical Characteristics The LSI20860 maximum power requirement, including SCSI TERMPWR,under normal operation is: Under abnormal conditions such as a short on SCSI TERMPWR, +5 ...

Installing the LSI20860 1-5 1.1.2.5 Safety Characteristics The bare board meets or exceeds the requirements of UL flammabilityrating 94 V0. The bare board is also marked with the supplier’s name ortrademark, type, and UL flammability rating. Since this board is installedin a PCI bus slot, all voltag...

Connecting SCSI Devices 1-7 Figure 1.2 Inserting the Host Adapter 1.3 Connecting SCSI Devices The main connections to SCSI devices involve two types of connectors: • Internal 50-pin SCSI connector • External 50-pin SCSI connector The next sections provide more detailed information. Bracket Screw

Connecting SCSI Devices 1-9 Figure 1.3 Internal SCSI Devices Chained Together 1.3.2 External SCSI Bus Connections This section provides step-by-step instructions about making externalSCSI bus connections. Step 1. To connect external SCSI devices to the LSI20860, plug the50-pin connector on one end o...

1-10 Using the LSI20860 Step 2. Plug the 50-pin connector on the other end of the SCSI cableinto the SCSI connector on the peripheral device. Thisconnection is shown in Figure 1.4 . Step 3. To connect more than one device to the LSI20860, use shieldedcables to chain them together as illustrated in F...

Connecting SCSI Devices 1-11 are connected serially (chained together) with SCSI cables. The first andlast physical devices connected on the ends of the SCSI bus must havethese terminators enabled. All other SCSI devices on the bus must havetheir terminators removed or disabled. Termination on the L...

1-12 Using the LSI20860 1.3.4 Setting SCSI IDs Each device on the SCSI bus, including the host adapter, must have aunique SCSI ID from 0 through 7. SCSI ID 7 is the preset host adaptersetting, giving it the highest priority on the SCSI bus. Refer to yourperipheral device documentation for instructio...

Troubleshooting 1-13 The device driver does not see one of the SCSI devices. 1. Reboot the computer. 2. Make sure the SCSI devices have different ID numbers (the bootdrive should have the lowest ID). 3. Make sure both ends, but only the ends, of the SCSI bus areterminated. 4. Check the cable and pow...

LSI20860 PCI to Ultra SCSI Host Adapter A-1 Appendix AGlossary of Terms andAbbreviations Bus A collection of unbroken signal lines across which information istransmitted from one part of a computer system to another. Connectionsto the bus are made using taps or connectors on the lines. Bus Mastering...

Glossary of Terms and Abbreviations A-3 Port Number See Port Address. RAM Random Access Memory. The computer’s primary working memory inwhich program instructions and data are stored and are accessible to theCPU. Information can be written to and read from RAM. The contents ofRAM are lost when the c...

A-4 Glossary of Terms and Abbreviations Single-EndedSCSI A hardware specification for connecting SCSI devices. It references eachSCSI signal to a common ground. This is the most common method (asopposed to differential SCSI which uses a separate ground for eachsignal). Termination The electrical con...

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