Upgrading JUNOS via USB

I borrowed this guide from Juniper but keeping it here incase i cannot find it going forward. You need to have a fat32 or smaller than 4gb partitioned USB flash disk. 

  1. Enter the shell as root:
    user@switch> start shell user root
Password:

    
root@switch%
  2. Before inserting the USB device, perform the following:
    root@% ls /dev/da*
/dev/da0 /dev/da0s1c /dev/da0s2a /dev/da0s3 /dev/da0s3e
/dev/da0s1 /dev/da0s1f /dev/da0s2c /dev/da0s3c
/dev/da0s1a /dev/da0s2 /dev/da0s2f /dev/da0s3d
  3. Insert the USB drive in the USB port. The following output will be displayed:
    root@% umass1: TOSHIBA TransMemory, rev 2.00/1.00, addr 3
da2 at umass-sim1 bus 1 target 0 lun 0
da2: <TOSHIBA TransMemory 5.00> Removable Direct Access SCSI-0 device 
da2: 40.000MB/s transfers
da2: 983MB (2013184 512 byte sectors: 64H 32S/T 983C)

root@% ls /dev/da*
/dev/da0 /dev/da0s1c /dev/da0s2a /dev/da0s3 /dev/da0s3e
/dev/da0s1 /dev/da0s1f /dev/da0s2c /dev/da0s3c /dev/da2
/dev/da0s1a /dev/da0s2 /dev/da0s2f /dev/da0s3d /dev/da2s1
    Note: '/dev/da2s1' is the USB drive.

  4. Create a directory for the USB drive to mount to:
    root@% mkdir /var/tmp/usb
  5. Mount the USB drive to the /var/tmp/usb directory:
    root@% mount_msdosfs /dev/da2s1 /var/tmp/usb
     (if you see an error make sure disk is FAT32 or partition is smaller than 4GB) 
    root@% ls /var/tmp/usb
images.tgz
    Note: 'ls /var/tmp/usb' will show all the files in the USB drive.

  6. Copy any of the USB files to the /var/tmp/usb directory:
    root@% cp /var/tmp/usb/images.tgz /var/tmp
root@% ls /var/tmp
images.tgz
    The images.tgz file from the USB is successfully copied to the /var/tmp directory.

  7. Now unmount the USB drive after the file is completely copied:
    root@% umount /var/tmp/usb
root@% umass1: at uhub0 port 1 (addr 3) disconnected
(da1:umass-sim1:1:0:0): lost device
(da1:umass-sim1:1:0:0): removing device entry
umass1: detached

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