Problem with RAID volume larger then 2TB on Dell workstations

I ran into a interesting issue this weekend. I was setting up a RAID volume on a Optiplex and Precision workstations, which have three 1.5 Terabyte (TB) drives. I tried creating a single large RAID 5 volume but the Intel Matrix storage manger (8.5.2) would not set the array to bootable. After much trial I found I could create smaller volume 160 Gigabyte (GB) for the system which was bootable and another utilizing the rest of the storage. My original plan was to create a large volume and partition it using the OS but this worked just as well, so instead I had two RAID 5 volumes. The only difference is the large volume is not bootable and requires the small one with the OS on it to first be mounted.