Let me rephrase my question now.

1. I am told NDMP level backups/incremental are block level backups. Is this 
true ? If so, how is this different from block level incremental(BLI) backups ?

2. When a level backup is initiated, what is the process. Will the filer walk 
the filesystem to identify the changed files and read those files or will it 
identify the changed blocks and move the blocks to the target

3. Why are NDMP incrementals significantly large in size compared to 
conventional incrementals ?

4. Symantec NBU guide talks of Netbackup supporting incremental NDMPs. Pls 
comment

Nash

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