Half_life .... I have been reading more about DRBD and it sounds very interesting. I do have a question do the two servers have to be completely identical when it comes to hardware
In my case the systems have different amount of ram and completely different cpu (not only one being amd and one being intel.... the new system has dual processors vs the old one being a single)
Finally if the CPU and ram don't play a role and I can still create this cluster.... would I even need hardware raid (not talking about my raid6 this is completely separate). Would I be able to use one SSD, one 500 gig drive and one 750 gig drive in each server..... using DRBD I would be able to create a raid1 over the network the 500 gig and 750 gig drives. I will keep the SSD on each system for the base Operating system.
From what I understand I can combine the 500 gig and 750 gig drive under LVM (total = 1.25 TB) and with DRBD essentially have raid 1 array. I could then create my 4 VM servers.... I would like them to always be on the new server and only switch to the old if something fails.
Hopefully I understand this correctly.. after doing some reading during lunch today