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Adaptec 2940U - AHA Storage Controller Ultra SCSI 20 MBps, User Manual

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Adaptec 2940U - AHA Storage Controller Ultra SCSI 20 MBps User Manual Download Page 1

1

Introduction

The Adaptec AHA

®

-2940Ultra and AHA-2940Ultra 

Wide PCI-to-Fast SCSI host adapters provide a pow-
erful multitasking interface between your com-
puter’s PCI bus and SCSI devices (disk drives, 
CD-ROM drives, scanners, tape backups, removable 
media drives, etc.). Collectively, both host adapters 
are referred to as the AHA-2940Ultra/2940Ultra 
Wide. The following figures show the major compo-
nents on the AHA-2940Ultra and AHA-2940Ultra 
Wide.

1

Adaptec AHA-2940

Ultra

50-pin 8-bit Internal

SCSI Connector

Host
Adapter
LED

AIC-78xx SCSI Protocol Chip

50-pin 8-bit

External

SCSI

Connector

Host Adapter

BIOS

LED Connector

Adaptec AHA-2940

Ultra Wide

50-pin 8-bit Internal

SCSI Connector

Host
Adapter
LED

AIC-78xx SCSI Protocol Chip

68-pin 16-bit

External

SCSI

Connector

LED Connector

Host Adapter

BIOS

68-pin 16-bit

Internal SCSI

Connector

Summary of Contents for 2940U - AHA Storage Controller Ultra SCSI 20 MBps

Page 1: ...he AHA 2940Ultra 2940Ultra Wide The following figures show the major compo nents on the AHA 2940Ultra and AHA 2940Ultra Wide 1 Adaptec AHA 2940Ultra 50 pin 8 bit Internal SCSI Connector Host Adapter LED AIC 78xx SCSI Protocol Chip 50 pin 8 bit External SCSI Connector Host Adapter BIOS LED Connector Adaptec AHA 2940Ultra Wide 50 pin 8 bit Internal SCSI Connector Host Adapter LED AIC 78xx SCSI Proto...

Page 2: ... are securely seated in the slot 5 When the host adapter is firmly seated in the expansion slot secure the metal bracket of the host adapter with the screw you removed in step 3 Do not replace the computer cover or reconnect your computer and peripherals to their power sources yet SCSI Configuration Guidelines Before installing your SCSI devices you should understand the basic SCSI concepts descri...

Page 3: ...ched to the host adapter set the Boot Target ID setting in the SCSISelect utility to correspond to the SCSI ID of the device you are booting from see Configuring the Host Adapter on page 7 SCSI Terminators To ensure reliable communication the SCSI bus must be properly terminated Termination is controlled by a set of electrical resistors called terminators Termi nators must be placed or enabled at ...

Page 4: ...ination setting see Configuring the Host Adapter on page 7 The following table lists the termination set tings for manual configuration Terminating SCSI Devices Read the device s documentation to determine how to enable or disable termination on your particular SCSI device s On most internal SCSI devices the ter mination setting is controlled by a jumper or a switch On other internal SCSI devices ...

Page 5: ... to connect up to two internal SCSI devices the AHA 2940Ultra kit includes a 50 pin internal SCSI cable and the AHA 2940Ultra Wide kit includes both a 50 pin and a 68 pin internal SCSI cable If you are connecting more than two internal SCSI devices you must obtain an internal SCSI cable with enough connec tors to accommodate all of your devices Adaptec sells high quality internal and external SCSI...

Page 6: ...ions see the device s documentation as well as SCSI Configuration Guidelines on page 2 2 Install the SCSI device in your computer Refer to your computer and device documentation for instructions 3 Plug the connector at one end of the internal SCSI cable into the host adapter s internal SCSI connector Make sure the colored stripe on one side of the cable is aligned with pin 1 of the host adapter s ...

Page 7: ... all external SCSI devices have been connected Using the LED Connector Optional Most computers have an LED disk activity light on the front panel If you disconnect the cable from the LED connector on the motherboard and connect it to the LED connector on the host adapter the LED on the front panel of the computer will light whenever there is activity on the SCSI bus Reassembling the Computer Be su...

Page 8: ...or if you would like to format or verify a disk see Starting the SCSISelect Utility on page 9 to start the utility SCSI Bus Interface Definitions Default Host Adapter SCSI ID 7 SCSI Parity Checking Enabled Host Adapter SCSI Termination Automatic Boot Device Options Default Boot SCSI ID 0 Boot LUN Number1 0 SCSI Device Configuration Default Maximum Sync Transfer Rate 20 0 MBytes sec2 40 0 MBytes se...

Page 9: ...inds of monitors Exiting SCSISelect To exit SCSISelect press Esc until a message prompts you to exit if you changed any AHA 2940Ultra 2940Ultra Wide settings you are prompted to save the changes before you exit At the prompt select Yes to exit then press any key to reboot the com puter Any changes you made in SCSISelect take effect after the computer boots Using the SCSI Disk Utilities To access t...

Page 10: ... it prompts you to reassign them if you select yes those blocks are no longer used You can press Esc at any time to abort the utility Installing Device Drivers Some operating systems embed include the AHA 2940Ultra 2940Ultra Wide device driver as part of their installation software These drivers work fine with your AHA 2940Ultra 2940Ultra Wide however the most recent version of the driver should b...

Page 11: ... IDs Are all devices on the SCSI bus terminated properly Does your system CMOS setup require you to enable PCI bus parameters If so see your computer s documentation Check that IRQ channel assignment board and BIOS settings have been made Did you install your host adapter in a bus master PCI slot Refer to your computer s documenta tion or try another slot Computer Will Not Boot from a SCSI Disk Dr...

Page 12: ...age 8 The SCSI ID is normally set with jumpers or switches on the drive 3 If this does not solve the problem back up all data on the SCSI hard disk and perform a low level format with the SCSISelect Format Disk option See the MS DOS documentation for instructions on partitioning the disk after formatting ...

Page 13: ...ION Only equipment certified to comply with Class B computer input output devices terminals printers etc should be attached to this equipment and must have shielded interface cables Finally any changes or modifications to the equipment by the user not expressly approved by the grantee or manufacturer could void the user s authority to operate such equipment Each host adapter is equipped with an FC...

Page 14: ...R AHA 2940Ultra 2940Ultra Wide PCI to UltraSCSI Host Adapter with SCSISelect Installation Guide AHA 2940Ultra 2940Ultra Wide PCI to UltraSCSI Host Adapter with SCSISelect Edition 2 20 Installation Guide ...

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