Multiple Device Support; Operating System Support; Dos/Windows - Adaptec AHA-3940 User Manual

AHA-3940/3940W User's Guide
Uses the superior SCSI-2 (Alternative 1) external connector
and standard internal ribbon connector
Tagged Queuing support
SCSI termination power-down control
Support for multiple logical units
Parity handling in Data, Message, Status, Selection/
Reselection, and Command phases
Active negation

Multiple Device Support

AHA-3940 supports up to seven SCSI devices per channel (14
devices total)
AHA-3940W supports up to 15 SCSI devices per channel (30
devices total)
Onboard BIOS fully supports capabilities of MS-DOS
up to two disk drives and MS-DOS 5.0 and above for up to
eight disk drives, without additional drivers
Onboard BIOS supports disk drives as large as 8 GBytes

Operating System Support

DOS/Windows

Under MS-DOS 5.0 or above, the AHA-3940/3940W can support up
to eight hard disk drives without additional software. (To do this
you must enable BIOS Support for More Than 2 Drives, which is dis-
abled by default.) Older versions of DOS support up to two hard
disk drives. You need additional software to do any of the following:
Support more than two hard disk drives under versions of
DOS prior to version 5.0
Support more than eight hard disk drives under MS-DOS 5.0
or higher
Remove or replace removable media (for example, Bernoulli
cartridges) while your computer is running
Support CD-ROM drives
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Current Date: 8/24/94
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ECN Date: 08/30/94
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