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Changing SCSI Addresses

If you need to change SCSI addresses, follow the instructions supplied with each
device.

Terminating the SCSI Devices and Adapter

Some SCSI devices have built-in terminators controlled by a DIP switch, jumper, or
push button. Other devices use terminators on the cable. Some devices require a
terminator be plugged into the device on a connector. After planning your installation,
you need to supply the correct terminator to the SCSI device at each end of the
chain. Refer to the device instructions to find out how it is terminated. If necessary,
you should purchase terminators when you buy devices and cables.

Active terminators are required for all installations for reliable SCSI-2 operation.

The basic rules of terminating SCSI devices are:

Ÿ

Terminate the ends of the chain

Ÿ

Do not terminate devices in the middle of the chain.

Table

A-1. Data Access Priorities for SCSI Addresses

Priority

SCSI ID

Actual SCSI Device Name

 Highest

 7

SCSI-2 Fast/Wide PCI Adapter

 |

 6

 |

 5

 |

 4

 |

 3

 |

 2

 |

 1

 |

 0

 |

 15

 |

 14

 |

 13

 |

 12

 |

 11

 |

 10

 V

 9

 Lowest

 8

   

Appendix A. Connecting SCSI Devices to the Adapter

A-3

Содержание PCI SCSI-2 Fast/Wide Single-Ended Adapter

Страница 1: ...IBM PCI SCSI 2 Fast Wide Single Ended Ada pter Installation Guide...

Страница 2: ...the publication The manufacturer may make improvements and or changes in the product s and or the program s described in this publication at any time without notice It is possible that this publicati...

Страница 3: ...Installing Configuring and Verifying Software 4 1 Verifying Device Driver Installation 4 1 AIX Device Driver Installation 4 1 Windows NT PowerPC Edition Device Driver Installation Version 3 51 4 3 Win...

Страница 4: ...chnical Commission IEC Statement E 2 United Kingdom Telecommunications Safety Requirements E 2 Avis de conformit aux normes du minist re des Communications du Canada E 4 Canadian Department of Communi...

Страница 5: ...attached devices are unplugged When adding or removing any additional devices to or from the system ensure that the power cables for those devices are unplugged before the signal cables are connected...

Страница 6: ...vi PCI SCSI 2 Fast Wide Single Ended Adapter Installation Guide...

Страница 7: ...n and configuration were successfully completed Related Publications This book refers to the documentation that came with your system unit ISO 9000 ISO 9000 registered quality systems were used in the...

Страница 8: ...viii PCI SCSI 2 Fast Wide Single Ended Adapter Installation Guide...

Страница 9: ...I synchronous data rates up to 10 MHz Wide 16 bit SCSI supports a maximum transfer rate of 20 MB 20 000 000 bytes per second Narrow 8 bit SCSI supports a maximum transfer rate of 10 MB per second The...

Страница 10: ...r disabled depending on what cables are attached Handling the Adapter Attention Static electricity may damage your equipment Leave the adapter in the static protective bag until you are ready to insta...

Страница 11: ...ors for each external device in your planned SCSI chain You can attach external wide 16 bit devices or narrow 8 bit devices to the adapter with the proper cable In both cases the cable end that attach...

Страница 12: ...SCSI cable to correctly attach a device Narrow devices use a cable with a 50 pin connector on the device end and a 68 pin connector on the adapter end Wide devices use a cable with a 68 pin connector...

Страница 13: ...Refer to the documentation provided with your system unit to remove the system unit covers and to install an internal SCSI device Attention Static electricity may damage your equipment Leave the adap...

Страница 14: ...r to the external port J2 Use the fastening screws on the cable connector to securely attach the connector to the adapter 2 Connect the other end of the cable to your SCSI device 3 If necessary connec...

Страница 15: ...ast Wide Single Ended Adapter is available for use follow the steps below 1 If the system unit is not on turn it on 2 Log in as root 3 At the prompt type the following and press Enter lsdev Cc adapter...

Страница 16: ...nd configure command is in progress When RUNNING changes into OK scroll down to the bottom of the page and locate the Installation Summary At the bottom of the page if the installation was successful...

Страница 17: ...he path to the OEM SCSI adapter files 8 Select Continue 9 After selecting the driver a window appears prompting whether or not tagged command queueing is desired If so click on OK otherwise click on C...

Страница 18: ...4 4 PCI SCSI 2 Fast Wide Single Ended Adapter Installation Guide...

Страница 19: ...inator is required Figure A 1 SCSI Chain with Internal and External Devices Term is the SCSI terminator on the last device or the end of the cable Setting SCSI Addresses Each SCSI device requires a un...

Страница 20: ...have a unique address To determine the SCSI addresses of the devices adapters already installed enter the following command lsdev Cs scsi This command returns the following information Column 1 device...

Страница 21: ...or to the SCSI device at each end of the chain Refer to the device instructions to find out how it is terminated If necessary you should purchase terminators when you buy devices and cables Active ter...

Страница 22: ...A 4 PCI SCSI 2 Fast Wide Single Ended Adapter Installation Guide...

Страница 23: ...H6 37 Terminator P N 52G426 2113 Adapter to 8 bit external SE single ported device plus term 1 5 meter Cable P N 52G 174 Terminator P N 52G426 2115 Adapter to 16 bit external SE dual ported device plu...

Страница 24: ...B 2 PCI SCSI 2 Fast Wide Single Ended Adapter Installation Guide...

Страница 25: ...atic termination sensing logic to be overridden by setting the individual jumpers on jumper block J7 The automatic sensing logic that controls the enablement and disablement of the built in terminator...

Страница 26: ...hed S4 When placed in the OUT position the termination control logic automatically determines that a cable and terminator are attached to the external bus This is used in conjunction with S3 to determ...

Страница 27: ...ther it is at the end of a SCSI chain or in the middle of a SCSI chain The adapter then enables or disables its built in SCSI terminators as required Typical installations use only one adapter and som...

Страница 28: ...Figure C 2 SCSI Chain with Internal and External Devices Term is the SCSI terminator on the last device or the end of the cable C 4 PCI SCSI 2 Fast Wide Single Ended Adapter Installation Guide...

Страница 29: ...erminators of another adapter on the SCSI bus Therefore in these cases you must specify to the adapters that external cabling is in use by moving the jumpers on J7 These configurations also require th...

Страница 30: ...and adapter B has access to those devices The internal and external cabling must be the same width If the internal cabling is wide the external cabling must be wide A narrow device can be placed on t...

Страница 31: ...on the external adapter A s external connector Failure to do so may make the adapter fail intermittently and may cause adapter diagnostics to fail If the external cable is removed from adapter A and l...

Страница 32: ...C 8 PCI SCSI 2 Fast Wide Single Ended Adapter Installation Guide...

Страница 33: ...one internal connector can have a cable attached at a time Internal 50 Position SCSI Bus Connector 1 2 49 50 Figure D 1 Internal 50 Pin SCSI Bus Connector Signal Name Pin Pin Signal Name Ground Ground...

Страница 34: ...Signal Name Pin Pin Signal Name Ground Ground Ground Ground Ground 41 43 45 47 49 42 44 46 48 50 MSG SEL C D REQ I O SI_O D 2 PCI SCSI 2 Fast Wide Single Ended Adapter Installation Guide...

Страница 35: ...2 DB 13 DB 14 DB 15 Ground Ground Ground Ground 5 6 7 8 39 40 41 42 DB P1 DB 0 DB 1 DB 2 Ground Ground Ground Reserved 9 10 11 12 43 44 45 46 DB 3 DB 4 DB 5 DB 6 Ground Ground Ground Ground 13 14 15 1...

Страница 36: ...nector Only Signal Name Pin Pin Signal Name Ground Ground Ground Ground Ground Ground 29 30 31 32 33 34 63 64 65 66 67 68 REQ I O DB 8 DB 0 DB 10 DB 11 D 4 PCI SCSI 2 Fast Wide Single Ended Adapter In...

Страница 37: ...to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment...

Страница 38: ...opean Standard EN 55022 The limits for Class B equipment were derived for typical residential environments to provide reasonable protection against interference with licensed communication devices Int...

Страница 39: ...t is essential that other optional cards not supplied by the manufacturer do not use main voltages or any other excessive voltages Seek advice from a competent engineer before installing other adapter...

Страница 40: ...to the standards set by the Voluntary Control Council for Interference by Information Technology Equipment VCCI This product is aimed to be used in a domestic environment When used near a radio or TV...

Страница 41: ......

Страница 42: ...IBM Part Number 93H2370 Printed in the United States of America on recycled paper containing 10 recovered post consumer fiber 93H237...

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