Tsm server 6.2.4.0
Tsm client 6.4.0.0
Tdp client 6.4.0.0

I have powershell scripts running our full & incremental Exchange 2010 backups.
The full backups truncate the logs, but the incremental do not.
I've read through the doc and googled, but haven't found any reason.
Nothing obvious showing up in the app logs.
Any help would be appreciated.

Here are the pertinent commands/files:

incremental backup command:
& .\TDPEXCC BACKUP * INCREMENTAL /PreferDAGPassive /MinimumBackupInterval=10 
/SkipIntegrityCheck /DAGNode=EXCHANGE2010 /BackupMethod=VSS 
/BackupDestination=TSM /LogFile=$myTsmSchedLog > $myTempFile

results:
VSS Backup operation completed with rc = 0
   Files Examined                   : 3530
   Files Completed                  : 3530
   Files Failed                     : 0
   Files Deduplicated               : 0
   Total Bytes Inspected            : 3620460520
   Total Bytes                      : 3622488810
   Total LanFree Bytes              : 0
   Total Bytes Before Deduplication : 0
   Total Bytes After Deduplication  : 0
   Files Compressed By              : 0%
   Deduplication Reduction          : 0.00%
   Total Data Reduction Ratio       : 0.00%
The operation completed successfully. (rc = 0)

dsm.opt:
*====================================================================
* Tivoli Storage Manager - BCBST Win Servers TDP Exchange Clients
*    Installed Fri 04/19/2013 11:30:58.60
*====================================================================
*====================================================================
* Identification Section
*====================================================================
nodename               xxxxxxxx_MAIL
tcpserveraddress       xxxxxxxx.bcbst.com
tcpport                5002
tcpclientaddress       xxxxxxxx.bcbst.com
tcpclientport          1510
tcpcadaddress          localhost
tcpclientport          1510
HTTPport               1581
webports               1503,1504
*====================================================================
* TCP/IP Section
*====================================================================
commmethod             TCPIP
tcpbuffsize            512
tcpwindowsize          1024
diskbuffsize           32
*====================================================================
* CAD/Schedule Settings Section
*====================================================================
managedservices        schedule
errorlogretention      90
schedlogretention      14
schedmode              polling
queryschedperiod       1
*====================================================================
* Misc Section
*====================================================================
clusternode            no
passwordaccess         Generate


tdpexc.cfg:
*********************************************************************
* IBM Tivoli Storage Manager for Mail
* Data Protection for Exchange Configuration File
*********************************************************************
LogFile                  tdpsched.log
LogPrune                 90
MountWaitForData         Yes
MountWait                Yes
BackupMethod             VSS
TempLogRestorePath       F:\tdp-temp
TempDBRestorePath        F:\tdp-temp
MailboxRestoreUnread     No
StoreMailboxInfo         NO
Retries                  4
SkipIntegrityCheck       YES
Language                 ENU
BackupDestination        TSM
LocalDSMAgentNode        xxxxxxxx
DAGNode                  EXCHANGE2010
ImportVSSSnapshotsOnlyWhenNeeded  NO
VSSPOLICY * * INCREMENTAL TSM EXCHANGE_LOGS
VSSPOLICY * * FULL        TSM EXCHANGE_DB


Steve Schaub
Systems Engineer II, Windows Backup/Recovery
BlueCross BlueShield of Tennessee

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