I have found the below settings to be the most optimal.  Also,
exclude any files that are not successfully being backed up -
this will prevent a backup of those files from ever being
tried in the first place.

cha         0
compressi   n
compressa   n
*dirm       dirmc *Use this option when backing up to tape
errorlogr   10
largecomm   n
maxcmdr     4
passworda   generate
quiet
retryp      10
schedlogr   10
schedmod    pr
su          y
tapep       n
tcpb        32
tcpn        y
tcpw        63
*txnb       25600 *Use this option when backing up to tape


--
Joshua S. Bassi
Joshua S. Bassi
Senior Technical Consultant
Symatrix Technology, Inc.
jbassi AT gloryworks DOT com
(503) 702-3371