Description Of Problem:
System:
1. Motherboard: 
    1. Asus ProArt X570 Creator WIFI 
    2. P/N: 90MB18Z0-MVAAY0
    3. Serial #: MBM0KS0035639J2
    4. Manufactured: 12/21
    5. Registered: 7/23/22
2. BIOS:
    1. Manufacturer: American Megatrends, Inc.
    2. ACPI BIOS version (upgrade): 0801
3. Processor: 
    1. AMD Ryzen 7 5700G with onboard Radeon Graphics
    2. Clock frequency: 3900MHz
4. Memory:
    1. 128GB (4x32GB) DDR4-3600
    2. G.Skill RipJaws F4-3600C18Q-128GVK
    3. CL18-22-22-42 1.35v
    4. Clock frequency: 2666 MHz
5. RAID Array:
    1. “RAIDExpert2” BIOS utility array configuration: 
        1. Type: RAID 1
        2. SATA HDD drives enabled: 
            1. Two (2) identical (new) Western Digital
            2. Capacity, each: 6TB
            3. Model #: WD6004FZWXSP
		4. RAID Controller selection (via BIOS default, #1 of 4 available): 
            	1. 0: AMD-RAID 00:3C:00:00 VID 0x1022 DID 0x7916
6. Operating System:
    1. OpenMandriva Lx 4.3 (Rock)  
    2. 64-bit version optimized for Plasma desktop and AMD Ryzen CPU
           
History:
1. Successfully create a RAID 1 array: 
    1. using the included “RAIDExpert2” AMI BIOS utility program
    2. on two (2) new SATA 6TB HDD drives
    3. which appear in the BIOS utility creation program as 6TB capacity
    4. and as a functional AMD-600.5GB RAID array on POST screen at subsequent boot 
2. The OM Linux partition editing program (KDE Partition Manager version 21.12.2)
    1. Reports both drives as 6TB maximum capacity
    2. Reports both drives partitioned to 1.46TB
    3. Will not allow normally permitted resizing beyond the 1.46 partition limits
    4. Will permit deletion and creation of new partitions to full 6TB size limit
    5. But this deactivates the RAID function yielding only regular HDD storage
Questions:
    1. Why does AMI BIOS RAID utility impose 1.46TB partition size limit?
    2. How to overcome this to increase RAID partition size to full disk capacity?