Actually, I don't think it does modify the access date.  Below, I've copied
a session that I've tested it on.

I did post something before about access dates and McAfee outbound file
scan.  You can find it at....

http://msgs.adsm.org/cgi-bin/get/adsm0107/877.html
http://msgs.adsm.org/cgi-bin/get/adsm0108/30.html

Alex

D:\Program Files\Reskit\perl>perl test.pl
d:\temp\testfile
atime=8/20/2001 11:14:49
mtime=8/20/2001 11:14:49
ctime=8/20/2001 11:14:45

D:\Program Files\Reskit\perl>cd ..\..\tivoli\tsm

D:\Program Files\Tivoli\TSM>cd baclient

D:\Program Files\Tivoli\TSM\baclient>dsmc sel d:\temp\testfile
Tivoli Storage Manager
Command Line Backup Client Interface - Version 4, Release 1, Level 1.16
(C) Copyright IBM Corporation, 1990, 2000, All Rights Reserved.

Selective Backup function invoked.

Node Name: OPS24
Session established with server S80ADSM: AIX-RS/6000
  Server Version 4, Release 1, Level 3.2
  Server date/time: 09/20/2001 11:11:01  Last access: 09/20/2001 11:09:10

Normal File-->                24 \\ops24\d$\temp\testfile [Sent]
Selective Backup processing of '\\ops24\d$\temp\TESTFILE' finished without
failu
re.


Total number of objects inspected:        1
Total number of objects backed up:        1
Total number of objects updated:          0
Total number of objects rebound:          0
Total number of objects deleted:          0
Total number of objects expired:          0
Total number of objects failed:           0
Total number of bytes transferred:      225
Data transfer time:                    0.00 sec
Network data transfer rate:            0.00 KB/sec
Aggregate data transfer rate:          0.03 KB/sec
Objects compressed by:                    0%
Elapsed processing time:           00:00:07

D:\Program Files\Tivoli\TSM\baclient>cd ..\..\..\reskit\perl

D:\Program Files\Reskit\perl>perl test.pl
d:\temp\testfile
atime=8/20/2001 11:14:49
mtime=8/20/2001 11:14:49
ctime=8/20/2001 11:14:45

D:\Program Files\Reskit\perl>