5.94 TB Capacity when I have 4X2GB Drives? - PR4100

I got a PR4100 which has 4X2TB Drives

However while checking my RAID profile:

RAID Volume
Volume_1
RAID 5
5.94 TB

So i got just 5.94 TB available. How come I dont have almost the 8 rather than the 6?

Because RAID5 uses one of the disks as a redundant disk. So you get the full capacity of 3x2TB.

If you want all 8 TB, you’ll need to use JBOD or RAID0.

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