DOCUMENT:Q113195  08-AUG-2001  [winnt]
TITLE   :Adaptec 274x Series SCSI Adapters
PRODUCT :Microsoft Windows NT
PROD/VER:3.1
OPER/SYS:
KEYWORDS:kbhw kbHardware

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Windows NT Server version 3.1 
 - Microsoft Windows NT Workstation version 3.1 
 - Microsoft Windows NT Advanced Server, version 3.1 
-------------------------------------------------------------------------------

SUMMARY
=======

Microsoft Windows NT version 3.1 currently supports the Adaptec 2740 and 2742
SCSI adapters in Adaptec's 274x adapter series. Support for Adaptec models
2740W, 2742W, 2740T, 2742T, 2740A, 2742A, 2740A-W, 2742A-W, 2740A-T, and 2742A-T
is provided by obtaining a driver from Adaptec.

MORE INFORMATION
================

Adaptec 274x SCSI adapters are 32-bit EISA adapters using the AIC 7770 RISC
chip. They support multitasking, multi-input/output, and tag queuing.

As with most Adaptec models, a model number ending in 2 (such as the 2742)
indicates support for floppy disk drives, while models ending in 0 (such as the
2740) do not support floppy disk drives.

Some models end with letters. The following explains what the letters indicate:

W - Wide SCSI. These models support 16 megabytes (MB) data transfer and are
   generally used for hard disk drives designed for this transfer speed.
   Only SCSI devices that support wide SCSI can take advantage of the
   higher data transfer rate. The external connector on this card is a 68-
   pin P connector. Other than the additional pins, it looks similar to a
   SCSI-2 connector.

T - Twin Channel. These adapters support 14 SCSI devices - either 7
   external and 7 internal devices, or 14 internal devices.

A - Indicates that this model is based on the AIC-7770 revision E RISC
   processor. Models without the "A" are based on the AIC-7770 revision C
   RISC processor.


According to Adaptec product support, their version of ARROW.SYS does support
models 2740W, 2742W, 2740T, 2742T, 2740A, 2742A, 2740A-W, 2742A-W, 2740A-T,
2742A-T. This driver can be obtained by downloading the file 2X4XWNT.ZIP from
the Adaptec BBS at (408) 945-7727. All support for the Adaptec driver is
provided by Adaptec. You can call Adaptec Technical Support at (408) 945-2550.

The products included here are manufactured by Adaptec, Inc., a vendor
independent of Microsoft; we make no warranty, implied or otherwise, regarding
these products' performance or reliability.

Additional query words: prodnt
======================================================================
Keywords          : kbhw kbHardware 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW310 kbWinNTSsearch kbWinNTS310 kbWinNTAdvSerSearch kbWinNTAdvServ310 kbWinNTS310search kbWinNT310Search kbWinNTW310Search
Version           : 3.1

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND.  MICROSOFT DISCLAIMS
ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  IN NO
EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.  SOME STATES DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
SO THE FOREGOING LIMITATION MAY NOT APPLY.

Copyright Microsoft Corporation 2001.