Need help flashing postmarket phone harddrive

[jmak]

1. I flashed the sd card with the latest jumpdrive.
2. I put the sd card in the  phone.
3. I rebooted the phone.
4. I got the message "jumpdrive is running"
5. I connected the phone to my computer
6. In the file manager "pmos boot" and "pmos root" appeared
7. In the linux terminal /dev/dm-0 appeared.

What next? How to flash the harddrive?

[SwordfishII]

1. I flashed the sd card with the latest jumpdrive.
2. I put the sd card in the  phone.
3. I rebooted the phone.
4. I got the message "jumpdrive is running"
5. I connected the phone to my computer
6. In the file manager "pmos boot" and "pmos root" appeared
7. In the linux terminal /dev/dm-0 appeared.

What next? How to flash the harddrive?

Look at the wiki under software. TLDR unless you use a demo pmOS image you need to use pmbootstrap to build an image.