Partitioning is based on number of "logical" disks.With Raid Type 1(1+0) two logical drives are created on each pair of hard drives.
CUCM 6.0 Disk Partition Size
1 disk - Active and Inactive partitions get 18.25%, boot/swap get a chunk (2.2MB) and Common gets the rest.
2 disk - Active and Inactive partitions get 25%, boot/swap get a chunk (2.2MB), spare gets rest of disk 1 and common gets all of second disk.
CUCM 5.0 Disk Partition Size
1 disk - 12.2GB for Active/Inactive, 2.2MB for swap/boot and common gets the rest.
2 disk - 12.2GB for Active/Inactive, 2.2MB for swap/boot and common gets all of disk 2.