Hello! I bought a system as (2500K, ASUS P8P67, 8gb corsair value)...now i have many Hard disks....a boot drive, several drives with data on them, and a new, empty drive....Problem...wen i connected my old boot drive (win 7 installed for old PC), after several attempts i was able to boot into me new system....then i connected one of my old 1 TB drives which had a single partition, it was detected and showed in my computer....then i connected my new 2 TB drive....since i had to format it i started computer managment....it asked my about 2 disks: should i set it to MBR or GUID....i selected MBR...then i created the new 2 TB volume...in the meanwhile, my old 1 TB volume vanished! it became unallocated space!...even though i did not delete it....is there anyway to undelete it without losing my data??? thanks a lot!!!