Cooper's tip of the moment, ALWAYS backup your Junos configurations. Hate when a customer does not, your router does not have raid (unless it has redundant REs, VC or is in a Chassis Cluster :)). It's a built in feature of Junos so use it! It even allows multiple sites, so if you have DR site with storage - Push it there too!
Here is the conf:
set system archival configuration transfer-on-commit
set system archival configuration archive-sites "scp://email@example.com/data/configs/DEVICE" password "bla"
set system archival configuration archive-sites "scp://firstname.lastname@example.org/data/configs/DEVICE" password "bla"
More info: http://www.juniper.net/techpubs/en_US/junos9.5/information-products/topic-collections/swconfig-system-basics/junos-software-system-management-router-configuration-archiving.html