I want to remove the raid on this server so I can make it an UnRaid server. What's the safest best way to do this?

Need some guidance... Came into this server. It has the following:

Dell PowerEdge T640 Tower Server

CPU: 2x Gold 6148 2.4GHz 40 Cores / 80 Threads

Memory: 64GB ECC REG Memory DDR4 

Storage: 2x 240GB M.2 Dell Boss Card in RAID1

Storage: 4x 1.2TB Dell Enterprise SAS HDD in RAID10

RAID: Dell Perc H330

Network: 2x 10Gb RJ45 on motherboard

PSU: Dual 1100W Hot Plug PSUs

Backplane: 8x 3.5in Drives LFF

Remote: iDrac Std