It looks like you internal flash drive on the SRX650 has failed.
ERROR: Execution failed for command fdisk
If you have hardware support, open a ticket and get an RMA started on the device.
If you don't have any support, you have two options:
1-if you have another of the same model, you can run a snapshot of the device to USB and then boot and run the SRX from the USB instead of the internal flash.
2-you can open the case (which would void support if you have it) and try to see if the internal flash is removable in this model. Some it is in a slot and others not. I don't know what the case is on the SRX650.