hi,

you mean to say that you have added your client under master server host properties>client attributes>windows open file backup.

let me know what;s your backup selection list.

 Hi,

Backup selection is normal all file-based

examples:

D:\Backup\*.txt
E:\Backup\*.txt

I didn't use any directives or advanced client configuration
Poilcy Type : MS-Windows-NT

As you did not use ALL_LOCAL_Drives it will not do the shadow copy unless you tell it to.

Add Shadow Copy Components:\ to your selection (its in the pull down menu)

 Hi, not really meant using shadow copy (system state). I'm referring to the Volume Shadow Copy (Not sure why it called VSS) :)

Normally when you specified to use Open File backup, VSS or VSP snapshot is needed. However in my case, this snapshot is not triggered whenever I run a back up of F:\ drive for example. Hence backup is very slow and some files will failed.

However if I use the same selection with BackupExec agent, the VSS will trigger and the backup is successful and fast with no errors.

Hence my problem with Netbackup is that the VSS/VSP will not trigger. 

Quite a funny problem as usually when you enable the File Open option from Host Properties > Master, you can force the client to run with either VSP/VSS.

Client is Windows 2003 client and VSS is indeed working as BackupExec agent is able to trigger it.

Weird....

After installing NBU client software have You rebooted this client?

If you have installed NBU for Windows on a server which still has Backup Exec installed, there is a conflict and strange things will happen.  One issue is under "c:\windows\system32\drivers\etc\services".  Here you may find NBU port numbers have been deleted.

My strong recommedation is to uninstall Backup Exec and reinstall NBU.