Disk Usage
When all 7 disks are of the same size, and used in RAID, N4200 disk usage
percentage is listed below:
RAID Level Percentage Used
RAID 0 100%
RAID 1 1/n x 100%
RAID 5 (n-1)/n x 100%
RAID 6 (n-2)/n x 100%
RAID 10 50%
JBOD 100%
n：HDD number
140
