/******************* Adaptec, Inc. **********************/
/							/
/		Trouble Shooting Guide 			/
/			12/9/92				/
/							/
/*******************************************************/


This document is intended to supplement the trouble shooting 
techniques outlined in your Adaptec Literature and should never
be considered a replacement for one on one support with a technical
support engineer.  This document can be used for trouble shooting 
the most common questions and problems associated with the use of
Adaptec products.  Adaptec assumes no responsibility regarding the 
use of the suggestions contained in this document. 





Section 1	Adaptec Product Identification


1.1	Hardware

	Adaptec boards with identifying numbers preceded by the letters
	ACB are older, obsolete non-SCSI or SCSI to non-SCSI adapters.

	Boards with identifying numbers preceded by the letters AHA are
	SCSI Host Adapters.  The following is a list of obsolete and
	current Adaptec SCSI Host Adapters:


	AHA-1510/AIC-6260	Current		ISA/built-in, Prog. I/O
	AHA-1520/1522		Current		ISA, Programmed I/O
	AHA-1540		Obsolete	ISA, Bus-Mastering
	AHA-1540A/1542A		Obsolete	ISA, Bus-Mastering
	AHA-1540B/1542B		Current		ISA, Bus-Mastering
	AHA-1640		Current		MCA, Bus-Mastering
	AHA-1740		Obsolete	EISA, Bus-Mastering
	AHA-1744		Current		EISA, Differential SCSI
	AHA-1740A/1742A		Current		EISA, Bus-Mastering

	Boards with two numbers, i.e. 1540/1542, represent two variations
	of the same art work board.  The number that ends in a 2 
	indicates that the board also has a Floppy Drive interface, and
	the computers floppy drives can be used on the FD connector.


1.2	Software

	Adaptec Software is limited to the SCSI HAs in this section.
	The following list represents the current software packages
	and what they support.  


	Adpatec's EZSCSI	Supports all Adaptec current SCSI HAs	
				for ASPI management, HD support, 
				removable media with removability,
				MS Windows 3.x support and CD-ROM
				support in DOS and Windows.
				Latest Ver:	1.0
				Included as a replacement to 
				ASW-1210/ASW-1410 in the latest
				shipments of:
					AHA-1510CDRK
					AHA-1522K
					AHA-1542BK
					AHA-1742AK

	ASW-1210		ASPI Management software for the 
				AIC-6260/1510/152x Family.  Support
				for HD and removable media with 
				removability, Windows 3.x support.
				Latest Ver:	3.0

	ASW-1410		ASPI Management software for the 
				154x/1640/174x Families.  
				Support for HD and removable media 
				with removability, Windows 3.x support.
				Latest Ver:	3.0a

	ASW-310			Sytos Plus v1.21 Tape Backup Software for
				DOS.  Requires an ASPI manager for
				the installed Adaptec HA.
				Latest Ver:	2.0
	
	ASW-410			CD-ROM ASPI Module for DOS/Windows.
				Requires an ASPI manager for the 
				installed Adaptec HA.
				Latest Ver:	2.1

	ASW-500			CorelSCSI! ASPI Modules for support
				in DOS/Windows of CD-ROM, Tape drives
				M/F Drives, Flopticals, WORM drives,
				Hard Drives, Erasable Drives, 
				and Erasable Drives.  Novell Support
				of CD-ROM, Jukeboxes, HDs, M/F Drives,
				WORM Drives and Erasable Drives.
				OS/2 Support for HDs, Erasable Drives
				CD-ROM Drives, WORM Drives, M/F Drives.
				Latest Ver:	1.0
				Included only in these packages:
					AHA-1522 Plus Kit
					AHA-1542B Plus Kit
				
	ASW-1400 Ver. 1		Adaptec part number to incorporate 
				three separate ASPI management packages 
				previously included in the Plus Kits.  
				Includes Directories for DOS, OS/2,
				and Novell.  Provides ASPI management
				for DOS, OS/2 ver. 1.3 LADDR and 
				NETWARE.  Includes all the support 
				features of ASW-1210/1410, ASW-1420 and 
				ASW-1440.  ASW-1450 is still a separate
				diskette.
	
	ASW-1400 Ver. 2		Adaptec part number to incorporate the
				three Non-DOS ASPI management packages 
				previously included in the regular
				Bus Master Kits now shipping with 
				Adaptec's EZSCSI.
				Includes Directories for OS/2, Novell, 
				while support for UNIX is on a separate 
				diskette.  Provides ASPI management
				for OS/2 ver. 1.3 LADDR, NETWARE and UNIX.  
				Includes all the support features of 
				ASW-1420, ASW-1440 and ASW-1450.

	ASW-1220/1420		ASPI Management for OS/2 1.3 LADDR
				versions.  Support for HDs and CD-ROM
				for all current Adaptec HAs.
				Latest Ver:	1.3
	
	ASW-1240		ASPI Management for NETWARE 286 and 
				386 for the AIC-6260/1510/1520 family.
				Supports HDs and Removable Media Drives.
				Latest Ver:	1.3

	ASW-1440		ASPI Management for NETWARE 286 and 
				386 for the 154x/1640/174x Families.
				Supports HDs and Removable Media Drives.
				Latest Ver:	3.3
	

	ASW-1250		ASPI Manager for SCO UNIX for the
				AIC-6260/1510/152x Families.  Supports
				HDs, Removable Media and Tape drives.
				Latest Ver:	1.0

	ASW-1450		ASPI Manager for SCO UNIX for the
				154x/1640/174x Families.  Supports
				HDs, Removable Media and Tape drives.
				Support for these devices and possibly
				more may be embedded in your SCO UNIX 
				kernel.  Contact SCO for compatibility.
				Latest Ver:	1.0

	ASW-C174		Configuration files and utilities for
				the AHA-174x family of HAs.
				Latest Ver:	3.1



Section 2	Most Commonly Asked Questions


2.1	Hardware Questions

	Q.  Why does my computer/SCSI HA think that I have 7 hard drives,
	(or CD-ROMs, or ..) when I only have one drive connected?

	A.  When installing an Adaptec SCSI HA, SCSI bus protocol must
	be observed.  The HA should be SCSI ID 7, always the highest ID
	number, so that the HA will always win SCSI bus arbitration.
	SCSI bus theory dictates that each device (the HA is a device)
	must have a unique and separate SCSI ID number.  If a HD or
	other device is attached to the SCSI bus with the same ID as 
	the HA, then upon scanning of the SCSI bus for devices, the 
	HA will see a response for "phantom" devices at IDs where no 
	device exists, because of this ID conflict.  To solve this 
	problem, simply set the devices ID to something other than that
	of the HAs SCSI ID.  If the device is a boot drive, then the 
	SCSI ID should be set at 0.


	Q.  Why can't I use the entire size of my hard drive that is 
	rated over 1 Gigabyte in capacity, when I am using DOS?

	A.  DOS 4.x and above has a limitation of 1024 cylinders per
	physical drive.  This limitation, on current disk controllers
	and SCSI HAs that utilize the standard of 1 Megabyte per 
	cylinder, leads to a 1 Gigabyte limit.  Only our 1542B/GIG and
	174xA (with special BIOS in Enhanced Mode using ASW-C174 v3.1) 
	series of HAs have the ability to break this limit.
	If your 154xB has a BIOS part number of 420424-00-C
	or greater, or if your 174xA has a BIOS part number of 
	450216-00-A or greater, then you already have support for more 
	than 1 Gigabyte.  Refer to your User's Manual addendum for help 
	on setting up this feature.  Call Adaptec's Technical Support at 
	1-800-959-SCSI if your boards do not have this support built in.


	Q.  Why can't I use my new CD-ROM/Tape/WORM drive with my 
	Adaptec HA?

	A.  Most Adaptec SCSI HAs are designed to support two HDs and 
	on some models 2 floppy drives with just a bare board.
	When purchased in the KIT form, some HAs will come with drivers
	for removable media and operating systems other than 
	DOS.  A few KITs come with drivers and software for CD-ROM,
	tape and other peripherals.  For more information on what your
	particular HA/kit should support, contact your dealer/distributor
	or look at KITS.TXT on this BBS for an overview.


	Q.  How come when I boot my computer, I see a message that says
	something like "SCSI BIOS not installed", or I see a message that
	says "Drive C already installed" or "Searching for Target 0"
	and my computer hangs here for about 60 seconds before going
	on?

	A.  The BIOS on Adaptec HAs is used primarily for booting off 
	of attached SCSI HDs set to ID 0 (Target 0).  SCSI ID of the HD
	is set with jumpers or switches located on the HD.  
	If the HA you are using is not being used to control a bootable 
	SCSI HD, and the HA has been working with the attached devices 
	and their associated drivers, then disable the BIOS on the HA 
	you are using.  Consult your HA User's Guide, or Installation 
	Pamphlet for the jumper that enables the BIOS, or the software 
	switch that needs to be set to disable the BIOS.  152x and 154x 
	boards can have the BIOS disabled with jumpers, 1640 and 174x 
	boards BIOS' enabling is controlled by software.


	Q.  Why does my 174x board always come up in the configuration
	as being in Standard Mode, and what is the difference between
	Standard Mode and Enhanced Mode?

	A.  The default of the configuration files and overlay files used
	to configure the 174x is the most compatible mode, Standard.
	Standard Mode is equivalent to 154x emulation.  Standard Mode
	requires IRQ, DMA and I/O port definitions and policing by the
	installer.  Only 4 174x's can be used if all in Standard mode.
	Enhanced Mode allows the installer the luxury of not having to 
	worry about the DMA, IRQ and I/O address, as this is all taken 
	care of by the configuration and EISA motherboard.  Enhanced mode
	also is the only mode that supports Fast-SCSI.  Up to 4 Gig of 
	RAM is supported, with up to 12 HAs being allowed.


	Q.  Why can't I configure my 174x in Enhanced Mode, seeing
	the EISA motherboard error "ID mismatch in slot X", or why
	do I always see the error "Host Adapter Initialization Failed!"
	when I configure the card for Enhanced Mode?

	A.  As the EISA standard evolved, and speed increased, the 
	difference between different manufacturers propagated.  The
	174x family of boards are well designed, high performance boards
	that need some special attention to get them installed in a 
	few EISA motherboards.  Some of the Adaptec Technical Support
	situations that have occurred include:

		When using the AMI ECU program, the installer should 
		verify that they are using version 1.4C or higher of 
		that ECU program.  When using this ECU program, the 
		installer should verify that they are using the 
		correct CFG file needed for their type of 174x
		board, and that the file ADP0000.OVR (dated 6/4/92) 
		exists in the same directory that the ECU
		program and CFG files are in.  When using the AMI ECU
		program earlier than 1.4C, the installer will not be
		able to configure the board in Enhanced Mode, using
		the ASW-C174 utilities v3.0 or later.  Refer to page
		1 of the 174x Installation Guide (ASW-C174) for the
		file you should use for your HA model.

		When using some Compaq DeskPro or SystemPro models
		that have the CPU mounted on a special board, the
		installer should take care to minimize the number
		of boards between the CPU board and the Adaptec
		174x board.  It seems that when other EISA boards
		exist between the Adaptec HA and the CPU board, the
		Enhanced Mode configuration will not complete, or
		the board will report an error indicating that the
		HA could not be initialized.  This seems to be a
		situation that is not consistent, and is usually only
		associated with EISA communication boards in the
		slots between the HA and CPU boards.

		It seems that some 50Mhz and faster motherboards have
		increased the response time of the INT signal from
		the adapter cards.  For a while we included on our 
		bulletin board, in the file ASWC174.EXE (the ASW-C174 
		files, ver. 3.1) modified CFG files that were intended 
		to address the problem of the INT trigger state.  
		These modified files seemed to cause 
		more problems than they solved, and were removed.
		The net result of this is that if your 50MHz or faster
		EISA motherboard gives you the error "Failed to 
		Initialize Host Adapter" after configuring it for
		Enhanced Mode, then follow these steps.
		Using a DOS editor, open the CFG file (it's ASCII text)
		being used, and position in the file somewhere around 
		line 120.  Near this location you will see a line that
		reads "CHOICE = ENHANCED MODE".  Under this a few lines
		will be the line "TRIGGER = EDGE" or "TRIGGER = LEVEL".
		If this line says EDGE, change EDGE to LEVEL, this is the
		standard setting for MOST EISA motherboards.  If it
		says LEVEL, then try using EDGE.

