da0 at umass-sim0 bus 0 target 0 lun 0
 da0: <SanDisk Cruzer Micro 6.51> Removable Direct Access SCSI-0 device
 da0: 1.000MB/s transfers
 da0: 988MB (2025471 512 byte sectors: 64H 32S/T 988C)

root@amnesyac% dd if=/dev/zero of=/dev/da0 bs=128k
2435+0 records in
2434+0 records out
319029248 bytes transferred in 352.314078 secs (905525 bytes/sec)
root@amnesyac% disklabel -R -w da0 auto
root@amnesyac% newfs -U /dev/da0
/dev/da0: 989.0MB (2025468 sectors) block size 16384, fragment size 2048
using 6 cylinder groups of 183.69MB, 11756 blks, 23552 inodes.
with soft updates
super-block backups (for fsck -b #) at:
32, 376224, 752416, 1128608, 1504800, 1880992
root@amnesyac% mkdir /var/tmp/usb
root@amnesyac% mount /dev/da0 /var/tmp/usb
root@amnesyac% mv junos-jsr-12.1R5.5-export.tgz /cf/var/tmp/usb/
root@amnesyac% cli
root@amnesyac> file list detail /var/tmp/usb
/var/tmp/usb:
total 406474
drwxrwxr-x  2 root  operator       512 Feb 28 04:52 .snap/
-rw-r--r--  1 root  wheel  208012563 Feb 27 19:33 junos-jsr-12.1R5.5-export.tgz
root@amnesyac> request system software add junos-jsr-12.1R5.5-export.tgz
ERROR: Missing package: /cf/root/junos-jsr-12.1R5.5-export.tgz
root@amnesyac> request system software add /var/tmp/usb/junos-jsr-12.1R5.5-export.tgz
NOTICE: Validating configuration against junos-jsr-12.1R5.5-export.tgz.
NOTICE: Use the 'no-validate' option to skip this if desired.
Checking compatibility with configuration
Initializing...
Verified manifest signed by PackageProduction_9_6_0
Using /var/tmp/usb/junos-jsr-12.1R5.5-export.tgz
Checking junos requirements on /
Available space: 80793 require: 4688
Saving boot file package in /var/sw/pkg/junos-boot-jsr-12.1R5.5.tgz
Verified manifest signed by PackageProduction_12_1_0
Hardware Database regeneration succeeded
Validating against /config/juniper.conf.gz
cp: /cf/var/validate/chroot/var/etc/resolv.conf and /etc/resolv.conf are identical (not copied).
cp: /cf/var/validate/chroot/var/etc/hosts and /etc/hosts are identical (not copied).
[edit system services ssh]
'ssh'
warning: daemon binary /usr/sbin/sshd not found
mgd: commit complete
Validation succeeded
Installing package '/var/tmp/usb/junos-jsr-12.1R5.5-export.tgz' ...
Verified junos-boot-jsr-12.1R5.5.tgz signed by PackageProduction_12_1_0
Verified junos-jsr-12.1R5.5-export signed by PackageProduction_12_1_0
Available space: 81388 require: 4688
WARNING: JUNOS edition export != domestic, need to regenerate ssh host keys
Saving boot file package in /var/sw/pkg/junos-boot-jsr-12.1R5.5.tgz
JUNOS 12.1R5.5 will become active at next reboot
WARNING: A reboot is required to load this software correctly
WARNING:     Use the 'request system reboot' command
WARNING:         when software installation is complete
Saving package file in /var/sw/pkg/junos-12.1R5.5.tgz ...
cp: /var/sw/pkg/junos-12.1R5.5.tgz: No space left on device
Saving state for rollback ...
root@amnesyac> request system reboot
Reboot the system ? [yes,no] (no) yes
Shutdown NOW!
[pid 1988]
root@amnesyac>
*** FINAL System shutdown message from root@amnesyac ***
System going down IMMEDIATELY
Timeout, server not responding.