I have the excel spread sheet loaded up. I have 3 Databases roughly 700 GB each on one database server. This calculator does funky things and spits out the wrong number of databases when I enter the information into it. The only way I could get it to calculate 3 DBs on one database server was to enter 2 Mailbox servers and 5 Databases on each node. On the DPM requirements tab I get 3 databases with a replica size of 734GB.
What I actually have is 1 server holding Mailbox Database role with 3 databases about 700GB each. Incremental backups ever 4 hours retention range of 90 days. Express Full backup is Daily.
My server layout is internal disks for the OS and attached DAS for DPM to use as backup space.
On the OS drive will DPM need 36 gigs ? Of the Attached storage DPM will need roughly 10TBs ?