I am posting here, because reading a lot of documents on MS site and technical forums have caused only more confusion.
The equipment i have: 2 IBM X3650 M3 servers; both have 2 72GB SAS disks configured as RAID1, 4 10/100/1000 ethernet ports and 72GB RAM. Operating system is Windows 2008 R2 Enterprise.
1 DS 3400 SAN with 9 400GB SAS drives configured as RAID 6. Connection to the both servers is done via fibre adapters. At the moment it has 1 array which is configured as 4 logical disks - 2 for each server.
1 48 port gigabit switch.
At the moment both servers have full Windows 2008 R2 OS running; they are also both AD controllers and run Hyper-V service. Both servers host 3 virtual machines at the moment. VHD files are located on the logical disks in the SAN.
Is it possible:
Configure those servers so that when one X3650 server fails (i.e is physically destroyed) then the other X3650 will run those 3 VM-s automatically so that the users and administrators won't notice anything (only errors on the event log), they don't have to urgently do anything (i.e configure something on the server that is running) and of course virtual machines will run on another server like nothing has happened.
If that is possible, do i have to include double disk space for VHD files? I.e if the total amount of disk space for 6 VHD files is 1,5TB then i have purchase additional SAS disks to expand the array.
At the moment i use DS Storage Manager 10 to assign which server has which logical disk on SAN; how is Windows able to grab a logical disk hosted in the SAN that belongs to another server to itself automatically then?
Best regards, Lauri