The device writes the installation media image to the USB device:
root@device% dd if=install-media-qfx-5e-15.1X53-D30.5-domestic.img of=/dev/da0
 bs=1m
1399+0 records in
1399+0 records out
1466957824 bytes transferred in 394.081902 secs (3722469 bytes/sec)
6. Log out of the shell:
root@device% exit
% exit
user@device>
Related
Documentation
USB Port Specifications for the QFX Series on page 83•
• Performing a Recovery Installation
• Performing a QFabric System Recovery Installation on the Director Group
• Performing a Recovery Installation Using an Emergency Boot Device on page 237
Copyright © 2016, Juniper Networks, Inc.236
QFX5100 Switch Hardware Guide