Storage Media - Juniper ACX1000 Configuration Manual

ACX Series Universal Access Router Configuration Guide

Storage Media

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For more information about upgrading your M7i or M10i router, see the Customer Support
Center JTAC Technical Bulletin PSN-2007-10-001:
https://www.juniper.net/alerts/viewalert.jsp?txtAlertNumber=PSN-2007-10-001&actionBtn=Search
ACX2000 routers are shipped with 2 GB of memory and ACX1000 routers with 1 GB of
memory.
Except for the ACX Series, MX80 routers, and MX104 routers, the M Series, MX Series,
PTX Series, T Series, TX Matrix, and TX Matrix Plus routers use the following media
storage devices:
CompactFlash card—The CompactFlash card is typically the primary storage device
for most routers.
NOTE: M7i and M10i routers using RE-400 are not delivered from the factory
with the CompactFlash card installed. In this case, the hard disk is the
primary and only boot device. The M7i and M10i routers with RE-400 can
be upgraded to include the CompactFlash card.
Hard disk or solid -state drive—For most routers, a hard disk or solid-state drive is the
secondary boot device. When the CompactFlash card is not installed on the router,
the hard disk or the solid-state drive becomes the primary boot device. The hard disk
or solid-state drive is also used to store system log files and diagnostic dump files.
Emergency boot device—Depending on the router, the emergency boot device can be
a PC card, a USB storage device, or an LS-120 floppy disk.
On MX80 routers, the internal NAND flash devices (first da0, then da1) act as the primary
and secondary boot devices.
On ACX Series routers, the internal NAND flash devices (first da0s1, then da0s2) act as
the primary and secondary boot devices.
Emergency boot devices can be used to revive a routing platform that has a damaged
Junos OS. When an emergency boot device is attached to the router, the router attempts
to boot from that device before it boots from the CompactFlash card, solid-state drive
(SSD), or hard disk.
On an ACX Series router, the emergency boot device is a USB storage device.
On MX104 routers, the internal NAND flash device (da0) mounted on the internal eUSB
card acts as the primary boot and storage device. On MX104 routers, the emergency boot
device is a USB storage device that is plugged into one of the USB ports in the front plate.
When booting from an emergency boot device, the router requests a boot
acknowledgment on the console interface. If you enter yes, the emergency boot device
repartitions the primary boot device and reloads Junos OS onto the primary boot device.
After the loading is complete, the routing platform requests that you remove the
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