Storage Media

The router has three forms of storage media:

• Flash drive, which is a nonrotating drive. When a new router is shipped from the factory, the JUNOS software is preinstalled on the flash drive.
• Hard drive, which is a rotating drive. When a new router is shipped from the factory, the JUNOS software is preinstalled on the hard drive. This drive also is used to store system log files and diagnostic dump files.
• Removable media, either a PC Card or a LS-120MB floppy disk. The removable media that ships with each router contains a copy of the JUNOS software.

Table 2 specifies the router's device names. The device names are displayed when the router boots.

Table 2: Release 5.x Device Names

Device	Routing Engine 200	Routing Engine 333	Routing Engine 600
Flash drive	ad0	ad0	ad0
Hard drive	ad2	ad1	ad1
Removable media	afd0	ad4	ad4