Unable to create pool

[Aerialflame7125]

Hello! I am not new to trueNAS but am new to this update, and I am confused because I am a former proxmox user. Recently, I made the wild choice of switching to TrueNAS, all seems fine and dandy, i grabbed a new ISO, installed it, and now trying to create a pool. When I try to create a pool I get a error saying

Code:

Failed to wipe disk sda: Device or resource busy: '/dev/sda'

Now I am stuck here wondering on what to do, I have listed my pool setup and configuration for further troubleshooting. Thank you!