Help Needed - Backup Design
I need some advice on a project I am currently given.
My client wanted to backup his data to tape. His data size is about 200TB which 160TB is MS Exchange, 10TB is SQL and 40TB of other files.
The number of servers is around 100 to 150. All Windows.
The backup window is 12 hours and nothing more and tape encryption is mandatory.
My client decision is to backup to LTO6 tape straight.
I know this is a tough requirement. So I actually suggested to backuup to disk first like NBU Appliance then to tape. I suggested 12 hours to disk and another 18 hours to tape whcih I also considered a tough design.
The client some how is open to this option but he still insists on a solution direct to tape first the the disk to disk to tape as a secondary solution.
Honestly speaking, I have never design such a huge backup before. So I am at a lost. I am already thinking just the numer of media servers alone can already create a server farm. I also do not know how much data a media server can process within an hour.
So can I have your suggestion and opinion on both solution?
Solution 1 - Direct to tape.
Solution 2 - Disk to Disk to tape.
Please let me know if you suggest like a 10Gb backup LAN, trunking FC etc. ideas.
Thanks in advance.