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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.
50-pin 8-bit Internal
SCSI Connector
50-pin 8-bit
External
SCSI
Connector
Adaptec AHA-2940 Ultra
68-pin 16-bit
Internal SCSI
Connector
68-pin 16-bit
External
SCSI
Connector
Adaptec AHA-2940 Ultra Wide
Host Adapter
BIOS
LED Connector
Host
Adapter
LED
AIC-78xx SCSI Protocol Chip
50-pin 8-bit Internal
LED Connector
SCSI Connector
Host
Adapter
LED
Host Adapter
BIOS
AIC-78xx SCSI Protocol Chip
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Table of Contents
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Related Manuals for Adaptec 2940U - AHA Storage Controller Ultra SCSI 20 MBps
Summary of Contents for Adaptec 2940U - AHA Storage Controller Ultra SCSI 20 MBps
- Page 1 External SCSI Connector AIC-78xx SCSI Protocol Chip Adaptec AHA-2940 Ultra 68-pin 16-bit 50-pin 8-bit Internal LED Connector Internal SCSI SCSI Connector Connector Host Adapter 68-pin 16-bit External SCSI Connector Host Adapter BIOS AIC-78xx SCSI Protocol Chip Adaptec AHA-2940 Ultra Wide...
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Page 2: Installing The Host Adapter
Installing the Host Adapter Follow these instructions to install the host adapter: Turn power to the computer and peripheral devices and disconnect the power cords. Remove the cover from the computer case. Locate an unused 32-bit PCI expansion slot (the slot must support Bus Master data transfers);... - Page 3 your hard disk and other SCSI devices, refer to the device’s documentation. The host adapter supports the SCSI Configured AutoMatically (SCAM) protocol, which assigns SCSI IDs dynamically and resolves SCSI ID conflicts auto- matically at bootup. If your system includes SCSI disk drives or other devices that support SCAM, you do not need to manually assign SCSI IDs to these devices.
- Page 4 If the AHA-2940Ultra detects that a cable is con- nected to both its internal and external SCSI con- nector, then it disables its terminators (the AHA-2940Ultra lies between the ends of the SCSI bus). We recommend that you leave the AHA-2940Ultra set to its default setting of Automatic.
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Page 5: Installing Scsi Devices
Wide SCSI SCSI cable If you purchased your AHA-2940Ultra/2940Ultra Wide in an Adaptec kit, the kit includes an internal SCSI cable that allows you 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). - Page 6 external) must not exceed 3 meters (9.8 ft.) to ensure reliable operation. If no Fast SCSI devices are con- nected, the total length of all cables must not exceed 6 meters (19.7 ft). See your device’s documentation to determine if it is a Fast SCSI device. Connecting Internal SCSI Devices If you are connecting internal SCSI devices, make sure you have an internal SCSI cable with enough...
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Page 7: Using The Led Connector
Connecting External SCSI Devices If you are connecting external SCSI devices to your host adapter, you must obtain an external SCSI cable for each external device you install. Prepare each SCSI device for installation; config- ure the SCSI ID and attach a terminating plug into the last external device. - Page 8 board. SCSISelect also contains SCSI disk utilities that let you low-level format or verify the disk media of your SCSI hard disk drives. SCSI Select Default Settings The AHA-2940Ultra/2940Ultra Wide has the default settings shown in the table on the following page. The default settings are appropriate for most PCI systems.
- Page 9 Support Removable Disks Under BIOS as Boot only Fixed Disks Display <Ctrl-A> Message During BIOS Enabled Initialization BIOS Support for Bootable CD-ROMs Enabled BIOS Support for Int13 Extensions Enabled Setting is valid only if Multiple LUN Support is enabled For AHA-2940 Ultra only For AHA-2940 Ultra Wide only Settings are valid only if host adapter BIOS is enabled Starting the SCSI Select Utility...
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Page 10: Installing Device Drivers
AHA-2940Ultra/2940Ultra Wide to perform at its optimum level. If you purchased your AHA-2940Ultra/2940Ultra Wide in a kit, the kit includes the latest Adaptec EZ-SCSI and Adaptec 7800 Family Manager Set software. Adaptec EZ-SCSI—allows you to install ®... -
Page 11: Troubleshooting Checklist
NetWare, OS/2, Windows 95/98, Windows NT , and UNIX. Refer to the 7800 Family Manager Set User’s Guide. Contact Adaptec if you need to order EZ-SCSI or the 7800 Family Manager Set. Troubleshooting Checklist If you have a problem during installation, check... - Page 12 Make sure the boot hard disk SCSI ID corre- sponds to the Boot Target ID setting in SCSISelect (see page 8). The SCSI ID is normally set with jumpers or switches on the drive. 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.
- Page 13 Adaptec, Inc. 691 South Milpitas Blvd. Milpitas, CA 95035 © 1999, Adaptec, Inc. All rights reserved. Adaptec, the Adaptec logo, AHA, EZ-SCSI, and SCSISelect are trademarks of Adaptec, Inc. which may be registered in some jurisdictions. Windows NT is a trademark, and Windows and Windows 95/98 are registered trademarks, of Microsoft Corporation in the U.S.
- Page 14 Installation Guide Installation Guide AHA-2940Ultra/ AHA-2940Ultra/ 2940Ultra Wide 2940Ultra Wide PCI-to- Ultra SCSI Host Adapter PCI-to- Ultra SCSI Host Adapter with SCSI Select with SCSI Select / Edition 2.20...
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