Adaptec 1744, AHA-1740A, 1742A user manual Adaptec

Page 50

adaptec

AHA-1740A/1742A/1744

Power should be cycled OFF and ON after changing any values on a host adapter, setup program, or SCSI device to be sure that the new initial values are loaded.

Make sure that SCSI parity is consistently enabled or dis- abled on all devices on the SCSI bus.

Verify that the host adapter and the SCSI devices are properly configured and installed.

Make sure that the SCSI bus is properly terminated.

Make sure that the disk has a DOS partition and a DOS format.

System works erratically, hangs, or the host adapter can- not always find the drives.

Check SCSI parity for consistency.

Check termination.

Check cable length and integrity.

If host adapter and drive LED remain on during a hang condition, make sure that the SCSI drive conforms to the Common Command Set Revision 4B (CCS 4B).

If only the host adapter LED remains on during a hang, it is prob- ably a host adapter to computer system interface problem. The system may not be capable of First-Party DMA transfers. Check with the system manufacturer for information.

Some older motherboard BIOS do not support freeform data for the EISA configuration. This support is required in order to changed the default Host Adapter options. If freeform data is not supported, the AHA-1740A/1742A/1744 can still be used, but the Host Adapter option defaults will always be used.

7-6

Image 50
Contents User’s Manual Page User’s Manual Copyright Iii Page Table of Contents Adaptec Glossary Index List of Figures List of TablesPreface Conventions BoldPage South milpitas blvd. ∙ milpitas, ca 95035 ∙408945-8600 Overview General Product InformationAdaptec EISA-to-Fast Scsi Host Adapter Overview Installation Software AHA 1740A/1742A/1744 Program FilesBios Operation Modes AHA 1740A/1742A/1744 Operation ModesSystem Caching Description Product Specifications AHA-1740A/1742A/1744 Product Specifications∙ Technical Reference Manual ∙ Installation GuideAssociated Documentation Hardware Installation Unpacking and InspectionPreparation Scsi Terminators Scsi Device TerminationScsi Parity Scsi IDPhysical Installation in the System Adaptec Multiple Host Adapter Support Standard ModeEnhanced Mode Standard and Enhanced Modes Adaptec Download Utility Running the ADL ProgramHost Adapter Listing ADL Main Menu Download Firmware Download Firmware ScreenDownload Warning Message Screen Enhanced Mode Firmware Information Firmware InformationLow-Level Format Low-Level Format Device Selection ScreenLow-Level Format Options screen displays Low-Level Format Option Selection ScreenExiting the ADL Program Exiting the ADL ProgramPage Host Adapter Bios Operation Standard Mode OperationAdaptec Enhanced Mode Operation Enhanced Bios Boot MessageBoot Message With Error Detection Enabled Troubleshooting Determining Problems Using the LEDProblems Detected During Installation AHA 1740A/1742A/1744 LED Flash CodesEISA-to-Fast Scsi Host Adapter Troubleshooting Problems Booting the System from a Scsi Drive Problems Using a Scsi and a Standard Disk DriveProblems Using Two Scsi Drives Adaptec DOS 1 Gigabyte Limit Extended Translation Using DOSDisk Drives Over 1 Gigabyte Drives With Mixed Partitions When to Use Extended Translation With DOS Version 5 OnlyUsing Extended Translation Load ASW-1410 v3.0a Using FdiskQuestions and Answers About Extended Translation Adaptec Loading the I/O Operating Environment Software DOS/WindowsUnix Novell NetWareOS/2 Glossary Command Descriptor Block Bus Device ResetCommand Control Block Asynchronous Event NotificationDirect Memory Access Common Command SetConfiguration Control MicroprocessorHost Enhanced ModeFirmware Industry Standard Architecture Host AdapterIBM PC-AT Compatible InitiatorManager MailboxMailbox Out Multi-tasking OperationSingle-Ended Scatter/GatherScsi Device Single-Threaded OperationSynchronous Data Transfer Negotiation Standard ModeSynchronous Data Transfer Tagged QueuingIndex AHA-1740A/1742A/1744 Index-2 Index-3 AHA-1740A/1742A/1744 Index-4