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Service Hints & Tips

Document ID: GSMH-3F3F69

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IBM PS/2 - Adaptec 1640 SCSI adapter fails

Applicable to: World-Wide

Symptom:
The Adaptec 1640 Micro Channel SCSI Adapter may fail to recognize attached SCSI devices such as the JetStore 2000 Tape Backup Unit or fail to boot from a hardfile that has DOS as the primary operating system.

Problem Isolation Aids:
PS/2 8556, 8557, 9556, 9557, 9576, 9577 and Server 500 systems may all be affected.

Reported failures regarding the Adaptec 1640 Micro Channel SCSI adapter include the following:
1. PS/2 9577 running OS/2 2.11 with the Adaptec 1640 adapter and a JetStore 2000 Tape Backup Unit installed. The "AHA1640.ADD" device driver would fail to load thus preventing the SCSI adapter from functioning properly.
2. Any PS/2 model mentioned above with a hardfile connected to the Adaptec 1640 adapter AND loaded with either PC DOS or MS DOS would fail to boot. The drive could be formatted with DOS, but a hang condition occurs when the system is rebooted.

System and adapter diagnostics run without failures.

Fix:
The Adaptec 1640 Micro Channel SCSI Adapter was not tested by IBM for use in PS/2 systems. There is a BIOS incompatibility between the adapter and the PS/2 systems mentioned above.

Customers that have purchased the Adaptec 1640 Micro Channel adapter for use in the PS/2 systems should be directed back to their point of purchase.

SAS KEYWORDS:
PSY2 IBMPC PSY2ADPT PSY2OEM
PSY2PART D/T8556 D/T8557 D/T9556
D/T9557 D/T9576 D/T9577 D/T8641
PSY2FDSK

	Search Keywords	Adaptec
	Hint Category	Non-IBM Hardware/Software, Retain, SCSI
	Date Created	19-02-96
	Last Updated	20-05-98
	Revision Date	19-05-99
	Brand	IBM PC
	Product Family	PS/2
	Machine Type	8556, 8557, 9556, 9557, 9576, 9577
	Model	Various
	TypeModel
	Retain Tip (if applicable)	H132520
	Reverse Doclinks and Admin Purposes