Adaptec 1520B User Guide - Page 13

I have some older SCSI-1 devices installed and my computer is operating erratically or hangs. Try changing the following device settings in SCSISelect for your older SCSI-1 device: Set Initiate Sync Negotiation to No; Set the Maximum Sync Transfer Rate to 5.0. One of the SCSI devices on my computer does not allow me to disable termination. How can I install it on the SCSI bus? If it is an external SCSI device, install the device as the last device of the external daisy chain. If it is an internal SCSI device, install the device at the end of the internal SCSI cable. The screen is difficult to read when I run the SCSISelect utility. Press F5 to toggle the display between color and monochrome modes. This may make it easier for you to read the screen. I cannot use my host adapter in a non-Plug and Play system. Check for possible resource conflicts between the host adapter and other cards installed in your computer; the cards may have conflicting BIOS address, I/O port address, and IRQ settings. Try changing these settings on the host adapter one at a time to isolate the conflict. I cannot use my host adapter in a Plug and Play System Try setting ISA Plug and Play Support to Disable in the Advanced Configuration Options of SCSISelect. Your host adapter is now a Legacy card, and you must configure it manually with the DIP switches and SCSISelect. Common Error Messages "Can not locate any host adapter at either 340h or 140h IO Port address. Possible IO Port address conflict" This message occurs when the BIOS fails to locate a valid host adapter in the system-Check for an I/O port address conflict between the host adapter and other cards installed in your computer. "Target connected, but not ready" This message occurs when the host adapter requests data from an installed SCSI device and does not receive an answer-Try setting the Send Start Unit Command to Yes for the host adapter. If your device is a removable-media drive, make sure the media is inserted in the drive. If the message still appears, follow the drive manufacturer's instructions to make sure the drive is set to spin up when the power is switched ON. "Host Adapter diagnostic error!" This message usually indicates that the host adapter is not working correctly-Check the items in Troubleshooting Checklist on page 11. If the problems persists, contact Adaptec customer support. "No ROM Basic, system halted" This message usually indicates that the first hard drive in the system has not been set as the active or bootable partition- Start the computer with a bootable diskette. Run Fdisk from the floppy and make sure that the partition on the hard drive is set to Active. (Use Fdisk and the option Show Partition Information.) If the hard drive partition is not shown as active, then use option number 2 of Fdisk to make the partition active. Contacting NEC s For technical support (answers to technical questions, information about the NEC BBS, Web site, and access to our FastFacts system) call 1-800-632-4667. s For pre-sales information and product literature, call 1-800-NEC-INFO. s The NEC FastFacts system provides answers to common questions, product literature, and current information about NEC products. The NEC FastFacts system is available 24 hours a day, 7 days a week, at 1-800-366-0476. s The NEC Web server provides product information, driver updates, and answers to common questions, as well as direct ordering through NEC. The NEC server is available 24 hours a day, 7 days a week, at http://www.nec.com. Ì 13 AHA-1520B Installation Guide Part Number: 511162-00, Rev. A Page 13 of 16 Print Spec Number: 495339-00 Current Date: 5/30/96 Last Modified: May 30, 1996 3:43 pm File Location: n:\mario\1520b_ig.nec\1520b_ig.frm ECN Date: 6/11/95 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA