Windows 2003 Smartdisk process dies during backup (4047898)

Date: JUL 2010
Product & Version:
OS Version: Windows 2003
Module & Version: SmartDisk 1.1
Application version:


Symptoms:
From binary log:

Information 2010/06/07 20:37:19 3464 Data Plugin NVBACKUP Attempting to connect to DAV server at address 'nvbackup', port 37453u
Error 2010/06/07 20:37:19 3464 Data Plugin NVBACKUP Failed to connect to DAV server at address 'nvbackup', port 37453u
Information 2010/06/07 20:37:19 3464 Data Plugin NVBACKUP Attempting to connect to DAV server at address '192.168.200.64', port 37453u
Error 2010/06/07 20:37:19 3464 Data Plugin NVBACKUP Failed to connect to DAV server at address '192.168.200.64', port 37453u
Severe Error 2010/06/07 20:37:19 3464 Data Plugin NVBACKUP Failed to connect to all known addresses for device 'nvbackup'
Severe Error 2010/06/07 20:37:19 3464 Data Plugin NVBACKUP Failed to connect to device 'nvbackup'
Error 2010/06/07 20:37:19 3464 Data Plugin NVBACKUP Stream has gone down
Error 2010/06/07 20:37:19 3464 Data Plugin NVBACKUP Error while closing the backup stream

From PercolatorSlave trace:
2 LOCALMSG -3588 1275939617201792 Start of Day process 'chunkstored' in state 2 has exited
0 LOCALMSG -3597 1275939617201792 Start of Day process 'chunkstored' exited unexpectedly

We see the following in Chunk store trace:
0 CSD -1236 1275939263552114 The CSD previously crashed, checking store...
2 LIBINDEX -166 1275939263567739 Using index implementation 'cabinet'
2 CABINET -5833 1275939271521068 Loaded file slot status array successfully
0 CSD -1333 1275939277489970 Check succeeded
1 LOGAPI -141 1275939277489970 Log 3 dedupe:recovery_finished app <NULL>
1 LOGAPI -141 1275939277489970 Log 7 dedupe:chunks app <NULL>
1 CABINET -1641 1275939279693152 Beginning transaction
2 CABINET -1643 12759392796931