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Adaptec 2930U2 User Reference - Page 7

Understanding SCSI

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Understanding SCSI SCSI (pronounced "scuzzy") stands for Small Computer Systems Interface. SCSI is an industry standard computer interface for connecting SCSI peripherals (such as a hard disk drive, CD-ROM drive, or scanner) to a common SCSI bus. A SCSI bus is an electrical pathway that consists of a SCSI adapter card (such as the SCSI Card 2930U2) installed in a computer and one or more SCSI peripherals. SCSI cables are used to connect the peripherals to the SCSI adapter card. For the SCSI bus to function properly, SCSI IDs must be assigned to SCSI devices (SCSI peripherals and SCSI card), and the SCSI bus must be properly terminated. SCSI IDs Each peripheral attached to the SCSI Card 2930U2, as well as the SCSI Card 2930U2 itself, must be assigned a unique SCSI ID number from 0 to 15. A SCSI ID uniquely identifies each SCSI device on the SCSI bus and determines priority when two or more devices are trying to use the SCSI bus at the same time. Refer to the peripheral's documentation to set the SCSI ID. Here are some general guidelines for SCSI IDs: s For internal SCSI peripherals, the SCSI ID usually is set by configuring a jumper on the peripheral. s For external SCSI peripherals, the SCSI ID usually is set with a switch on the back of the peripheral. 1

Section	Page
User’s Reference	1
SCSI Card 2930U2	1
SCSI Card 2930U2	3
User’s Reference	3
Contents	5
Understanding SCSI1	5
Troubleshooting4	5
Using the SCSI Card 2930U2 and SCSI Peripherals10	5
Configuring the SCSI Card 2930U2 with SCSISelect15	5
SCSI Cables and Adapters23	6
Understanding SCSI	7
SCSI IDs	7
Terminating the SCSI Bus	9
Troubleshooting	10
Troubleshooting Checklist	10
Troubleshooting in Windows 95 and Windows 98	11
When I start Windows 95, the system locks up when the Windows logo is displayed. How can I get th...	11
1 Start or restart your computer. View the messages that appear onscreen.	11
2 When the message “Starting Windows 95” appears, press and release the F8 function key while the...	11
3 From the menu that is displayed, select Safe Mode. (It may take several minutes for Windows 95 ...	11
4 If the system completes the boot to the desktop, the core software is functional; resources, so...	11
5 If the system still fails to boot, and the boot drive is on an existing IDE or SCSI controller,...	11
6 Verify an IRQ is available by viewing resources in System Properties.	12
7 Verify the Operating System is set to Optimal Performance by checking the Performance tab under...	12
How can I tell if the SCSI Card 2930U2 software driver is loading properly?	12
1 Click the Start button, point to Settings, then click Control Panel.	12
2 Double-click the System icon.	12
3 Click the Device Manager tab.	12
4 Double-click the SCSI Controller icon. The software driver for the SCSI Card 2930U2 is listed a...	12
An “X” inside a red circle appears with the SCSI Card 2930U2 software driver in Device Manager. W...	13
1 Double-click the SCSI Card 2930U2 software driver in Device Manager.	13
2 Under the General tab, check the Original Configuration (current) box.	13
What if there is no SCSI controller icon under Device Manager, or the software driver for the SCS...	13
1 Double-click the Add New Hardware icon in Control Panel.	13
2 Select Yes on the second screen of the Add New Hardware Wizard to have Windows search for the S...	13
3 Follow the onscreen instructions.	13
1 Double-click the Add New Hardware icon in Control Panel.	13
2 Select No on the second screen of the wizard.	13
3 Select SCSI controllers on the next screen.	13
4 Select “Adaptec AHA-2930U2 PCI Ultra2 SCSI Controller.”	13
1 Place the Adaptec EZ-SCSI Setup Diskette in the floppy disk drive.	13
2 Double-click the Add New Hardware icon in Control Panel.	13
3 Select No on the second screen of the wizard.	13
4 Select SCSI controllers on the next screen.	13
5 Click the Have Disk button, then click the Browse button.	13
6 Look in the \\drivers\\storage directory of the Windows 95 CDROM (or the root directory of the E...	14
How can I check the status of a resource (for example, IRQ, Memory, I/O)?	14
1 Click the Start button, point to Settings, then click Control Panel.	14
2 Double-click the System icon.	14
3 Click the Device Manager tab.	14
4 Double-click the Computer icon.	14
5 On the View Resources tab, click the option button for the type of resource you want to check.	14
6 The setting and the hardware using the setting are displayed.	14
How do I use the Hardware Conflict Troubleshooter in Windows 95 and Windows 98?	14
1 Click the Start button, then click Help.	14
2 From the Contents tab, double-click Troubleshooting.	14
3 Double-click If you have a hardware conflict.	14
4 Follow the step-by-step instructions in the Windows Help window.	14
Common Error Messages	15
Device connected, but not ready”	15
Start unit request failed”	15
Time-out failure during...”	15
Using the SCSI Card 2930U2 and SCSI Peripherals	16
Using SCSI Peripherals	16
Hard Disk Drives	16
Ultra2 (LVD) Hard Disk Drives	17
Figure 1. Ultra2 Internal Connector	17
Scanners	17
SCSI Peripheral Display at Bootup	18
Installing Multiple SCSI Cards	18
Connecting the LED Connector	19
Figure 2. Connecting the LED Cable to the LED Connector	19
Using SCSI and IDE (or EIDE) Peripherals	20
Replacing a Non-Adaptec SCSI Card with an Adaptec SCSI Card	20
Configuring the SCSI Card 2930U2 with SCSISelect	21
Table 1. SCSISelect Settings (Continued)	21
Starting SCSISelect	22
1 Turn on or restart your system.	22
2 When the following message appears on your screen, press the Ctrl-A keys simultaneously (this m...	22
3 From the menu that appears, use the	22
Exiting SCSISelect	23
1 Press Esc until a message prompts you to exit (if you changed any settings, you are prompted to...	23
2 At the prompt, select Yes to exit, then press any key to reboot the computer. Any changes you m...	23
Using SCSISelect Settings	23
Basic Host Adapter Settings	23
Table 2. Host Adapter SCSI Termination Configuration	24
Boot Device Options	24
SCSI Device Configuration	25
Advanced Configuration Options	26
Using SCSI Disk Utilities	28
1 Select the SCSI Disk Utilities option from the menu that appears after starting SCSISelect. SC...	28
2 Use the	28
3 A small menu appears, displaying the options Format Disk and Verify Disk Media.	28
SCSI Cables and Adapters	29
External Cables	29
Table 3. External Cables	29
External Connector Diagrams	29
Figure 3. High-Density 50-pin	29
Figure 4. Standard 50-pin	29
Internal Cables	30
Table 4. Internal Cables	30
Internal Connector Diagrams	30
Figure 5. Standard 50-pin	30
Figure 6. Ultra2 68-pin	30
Cabling Examples	31
Figure 7. Connectors on the SCSI Card 2930U2	31
Figure 8. Connecting Ultra2 Internal Peripherals	31
Figure 9. Connecting Ultra2 and Fast/Ultra Narrow Internal Peripherals	31
Figure 10. Connecting Ultra2 Internal and Fast/Ultra Narrow External Peripherals	32
Figure 11. Connecting Ultra2 Internal and Fast/Ultra Narrow Internal and External Peripherals	32
Maximum Cable Lengths	33
Table 5. Maximum Cable Lengths	33
1 License: This Agreement grants you, the Licensee, a license to:	37
a use the Software on a single computer system which incorporates an Adaptec SCSI Card, or in the...	37
b make one copy of the Software in machine readable form solely for back-up purposes provided you...	37
2 Restrictions: You may not distribute copies of the Software to others or electronically transfe...	37
3 Ownership of Software: As Licensee, you own the media upon which the software is fixed, but Ada...	37
4 Confidentiality: You agree to maintain the Software in confidence and to not disclose the Softw...	37
5 Term: This license is effective until January 1, 2042, unless terminated earlier. You may termi...	37
6 Limited Warranty: Adaptec warrants only that the media upon which the Software is furnished wil...	37
7 Limitation of Liability: IN NO EVENT WILL ADAPTEC BE LIABLE TO YOU FOR ANY SPECIAL DAMAGES, INC...	37
8 Limitation of Remedies: Adaptec’s entire liability and your exclusive remedy shall be:	37
a the replacement of any media not meeting Adaptec’s limited warranty which is returned to Adapte...	37
b if Adaptec or its distributor is unable to deliver replacement media which is free of defects i...	37
9 Export: You acknowledge that the laws and regulations of the United States restrict the export ...	38
10 U.S. Government Restricted Rights Legend for Units of the DoD: Use, duplication or disclosure ...	38
11 U.S. Government Restricted Rights Legend for Civilian Agencies: Use, reproduction or disclosur...	38