Adaptec 2920C - AHA - Storage Controller Installation Manual Download Page 2

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Installation

Installing the Host Adapter

WARNING: 

Before beginning the installation, 

turn 

OFF

 power to the computer and external 

devices and disconnect the power cords.

Step 1:  

Remove the cover from the computer case. (If 

necessary, refer to your computer documentation.) 

Step 2: 

Locate an unused PCI expansion slot. (This slot 

is typically white or ivory.) Unscrew the expansion slot 
bracket that covers the card-slot opening. 

The PCI slot must support bus master data transfers 
(refer to your computer documentation or contact your 
vendor).

Step 3: 

Insert the host adapter in the PCI expansion 

slot. Press it down firmly so that the contacts are securely 
seated in the slot, and secure it with the screw that you 
removed in step 2. 

Step 4: 

OPTIONAL-Connect the host adapter to the 

LED on the computer so that it will light whenever there 
is activity on the SCSI bus. To do this disconnect the LED 
cable from the LED connector on the motherboard and 
connect it to the LED connector on the host adapter.

Step 5: 

Make sure that all SCSI devices have unique 

SCSI ID’s from 0 to 6. (Refer to your device 
documentation for SCSI ID settings and instructions on 
manually changing the default settings.) 

Back of
Your Computer

PCI expansion slots
(typically white or ivory)

16-bit ISA expansion slot
(typically black)

Expansion slot bracket

Expansion slot bracket 
screw

Bus contacts

PCI expansion slot
(typically white or ivory)

Pin 1

1

LED cable
from motherboard

LED connector
on adapter

2-pin LED
cable

Summary of Contents for 2920C - AHA - Storage Controller

Page 1: ...d AutoMatically SCAM which automatically assigns SCSI IDs to SCAM compatible devices The figure below identifies the major com ponents of the AHA 2920C host adapter With the Adaptec software drivers you can use AHA 2920C host adapters in computers running DOS Windows OS 2 Windows 95 Windows NT UNIX and NetWare J3 50 pin Internal SCSI Connector SCSI Terminator Chips External LED Connector EEPROM BI...

Page 2: ...securely seated in the slot and secure it with the screw that you removed in step 2 Step 4 OPTIONAL Connect the host adapter to the LED on the computer so that it will light whenever there is activity on the SCSI bus To do this disconnect the LED cable from the LED connector on the motherboard and connect it to the LED connector on the host adapter Step 5 Make sure that all SCSI devices have uniqu...

Page 3: ...ows you to connect up to two internal SCSI devices Step 3 Plug one end of your 50 pin internal SCSI cable into the host adapter s internal SCSI connector To connect more than two internal devices you will need to obtain or purchase a SCSI cable with enough connectors to accommodate all of your devices Make sure that the colored stripe on one side of the cable is aligned with pin 1 of the host adap...

Page 4: ...evice to the previous device until all devices are connected to each other The device at the end of the chain must have a terminating plug or have the on board terminator enabled You need a 50 pin high density external SCSI cable to connect external devices to the host adapter Step 3 Reconnect the power cables to the computer and external SCSI devices Turn ON the power to the external devices firs...

Page 5: ...able data transfers the following requirements should be met Internal and external cables should be terminated with terminators either provided by the SCSI device at the end of the cable or by a separate terminating plug The terminator on the AHA 2920C is an active terminator For all SCSI devices connected to the host adapter make sure you use high quality SCSI cables to ensure reliable data trans...

Page 6: ...SCSISelect The SCSISelect configuration utility allows you to change host adapter settings without opening the computer case when using the AHA 2920C SCSISelect also has SCSI disk utilities that allow you to perform a low level format or to verify the disk media of your SCSI hard disk drives Starting the SCSISelect Utility You can start SCSISelect by pressing Ctrl A when the fol lowing prompt appe...

Page 7: ... does not support SCSI parity disable SCSI Parity Checking on the host adapter and all SCSI devices To deter mine if a device supports SCSI parity read the device documentation Host Adapter SCSI Termination This option sets termination on the host adapter You can set it to Automatic Enabled or Disabled We recommend that you leave this option set to its default setting of Auto matic When set to Aut...

Page 8: ...s is supported The default setting is No Disabled Enable this option if your boot device has multiple LUNs Include in BIOS SCAN This option determines whether or not the AHA 2920C will be included in the BIOS device scan during power up The default setting is Yes Reset SCSIBus at IC Initialization This option determines whether or not the SCSI bus will be reset and placed into an idle state after ...

Page 9: ... Windows NT or UNIX Caution If you decide to change the translation scheme back up your disk drives first All data is erased when you change from one translation scheme to another The standard translation scheme for SCSI host adapt ers provides a maximum accessible capacity of 1 GByte To support disk drives larger than 1 GByte the AHA 2920C includes an extended translation scheme This scheme under...

Page 10: ...options be sure you are applying them to the slot in which the host adapter is installed Check your computer documentation to verify which slot corresponds to which number If there is an Interrupt Type or Interrupt Line option in the Setup program be sure to select Int A or Interrupt Type A Depending on your system design you may also be required to change a motherboard jumper setting If there is ...

Page 11: ...ttention both the cause of the problem and its solution Listed below are some of the more common Sense Key values and their meanings 02h Not ready The media is not ready to for mat Be sure that media is inserted in the drive and that the media is spun up 03h Medium error The disk media may be defective If it is a removable media drive try using a different disk media If it is a hard disk drive the...

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Page 14: ...Increase the separation between equipment and receiver Connect the equipment to an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio television technician for help Use a shielded and properly grounded I O cable and power cable to ensure compliance of this unit to the specified limits of the rules This device complies with part 15 ...

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Page 16: ...d trade marks and Windows NT is a trademark of Microsoft Corpora tion in the U S and other countries used under license All other trademarks used are owned by their respective owners The material in this document is for information only and is subject to change without notice While reasonable efforts have been made in the preparation of this document to assure its accuracy Adaptec Inc assumes no l...

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