Yes. Dedupe is at the block level, but NDMP is a file level backup. So an NDMP-based backup is backing up "hydrated" file data. A block level backup (really only snapvault/snapmirror are available for Netapp) would be faster. But then again, there are efficiencies with compression during most backups...

    From: Scott Eno <s.eno@me.com>
 To: Toasters <toasters@teaparty.net> 
 Sent: Friday, December 21, 2012 9:12 AM
 Subject: question about NDMP dumps

In investigating why an NDMP dump over 10GbE isn't going as fast as it seems it should, a question arose.  Does the data being dumped via netbackup to a data domain device, 1.58TB deduped down to 813GB, have to get re-hydrated as the dump proceeds?  And, if so, would that impact the speed of the dump?
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