I'm incredibly impatient so I went ahead and tried it... I had to install my MB raid drivers seperately, but it eventually worked. No data loss.
Hi, I need to do the same thing and would appreciate some advise/understanding of what you did. I have Windows Home Server 2011 on C: and a D: data drive made of hardware raid 5 2TB, 2TB and 1.5TB currently.
After I had expanded the raid from 1TB + 1TB +1.5 TB I found WHS2011 doesn't seem to support over 2040GB. I can swap in a new C: drive and upgrade the OS to Windows Server 2012 which supports the larger drives, but I'm concerned over how to upgrade without impacting the hardware raid 5 data drive. Data is backed up to a NAS, but I'd rather not have to rebuild the server. Should I disconnect the data raid drives through the upgrade, then re-connect, or leave them connected whilst I install the OS.
I would appreciate your advise or description of what you did.
Whs11 certainly does support drives larger than 2tb, (your motherbd may not), but it cannot backup volumes larger than 2tb.
You will likely need to go into diskmanagement and delete the 2tb mbr volumes windows will create and then create a gpt volume using the full drive.