Comment Dedupe Bandwidth Savings (Score 1) 157
The author mentions the disk access for deduped primary storage (he points out (rightfully so) that deduped primary storage will perform slower than non-deduped primary storage), but he failed to mention what I think is an important point when discussing deduplication and network performance/bottlenecks.
If you dedupe your backups (the author mentions, for example, a VTL solution), you then gain the ability to replicate only the unique data to your DR site. In terms of saving bandwidth, this can be an absolutely huge savings. Imagine if you backup to a VTL, and with dedupe you get an average 25:1 ratio; that means that, for the purposes of DR, you can replicate 25x more data through your pipe than you would have been able to, without dedupe.