The only reason Networker still exists is because EMC bought Legato and they are bundling this with SAN sales. This company should have been taken to the woodshed and mercy killed several years back for the good of the whole IT community.

CommVault is so far ahead of the game here, Netbackup a close second. Tivoli is expensive/clumsy and Data Protector is proprietary - not qualified with much outside of HP gear.

Contrary to the article Tivoli Storage Manager does do CDP today.

http://www-306.ibm.com/software/tivoli/products/continuous-data-protection/

Also Data De-duplication is supported at the hardware level on IBM's N-Series storage controllers (which work fine as TSM disk pools) and is in the roadmap for a software-only solution.

http://www.redbooks.ibm.com/Redbooks.nsf/RedbookAbstracts/redp4320.html?Open

And with TSM's incremental-forever design there is much less duplication than other backup products to start with.

http://www.research.ibm.com/journal/sj/422/kaczmarski.html

Well it would have to, wouldn't it? Essentially RAID6 offers protection against double disk failure, and given the MTBF of even 1/2 Tb SATA drives there's no way I'd commit my data to it - even backup data - without at least RAID6 in place.. High density SATA drives seem to be assembled in factories whose idea of a clean room is sprinkling some water on the floor to keep the dust down.