Flash Features On The E120 Router And The E320 Router - Juniper SYSTEM BASICS - CONFIGURATION GUIDE V 11.1.X Configuration Manual

Flash Features on the E120 Router and the E320 Router

The E120 and E320 routers can have a second flash card installed with its SRP
modules. Device names are reserved for the E120 and E320 routers flash card slots:
disk0, disk1, standby-disk0, and standby-disk1. For backward compatibility, you can
use the name standby, which is equivalent to standby-disk0. You can use the second
card (disk1 or standby-disk1) only for storage of core dump (.dmp) files. When the
a card is installed and mounted as disk1 or standby-disk1, all .dmp files are
automatically stored on this card. You must use the card mounted as disk0 or
standby-disk0 for all other file types. Core dump files are stored on disk0 or
standby-disk0 only when a second card is not installed.
The copy, dir, delete, and rename commands all recognize the device names, as in
the following examples. Disk1 and standby-disk1 accept only dump files. This means
that you can copy only .dmp files to the second disk, delete only .dmp files from the
second disk, and rename only .dmp files on the second disk.
host1#copy reset05.dmp server2:reset05.dmp
host1#copy disk0:051802.dmp server2:reset05.dmp
host1#delete disk1:reset05.dmp
host1#delete standby:reset05.dmp
host1#delete standby-disk0:reset05.dmp
host1#delete standby-disk1:reset05.dmp
host1#rename standby-disk1:foo.dmp standby-disk1:bar.dmp
host1#rename foo.dmp /outgoing/bar.dmp
host1#dir
Please wait...
active/standby file systems are synchronized
--------------
disk0:reboot.hty
disk0:system.log
disk0:special.rel
disk0:lm4_12.dmp
standby-disk0:lm4_13.dmp
with unused sectors. If the utility cannot correct a corrupt sector, it marks the
sectors so that they cannot be reused. Errors in the boot block, FAT, or root
directory are fatal and cannot be corrected by the scan utility.
In a router that contains two SRP modules, if the scanning utility detects corrupt
sectors in flash on the primary SRP module during rebooting, the primary SRP
module reboots again. Both SRP modules now have standby status and reboot.
The first SRP module to complete rebooting becomes the primary. Because the
former redundant module started to reboot first, it likely becomes the primary.
When the former primary module has rebooted and the scan utility has fixed
corrupt sectors in its flash card, the SRP modules will synchronize. Any files or
directories removed by the scan utility are restored during the synchronization.
If you reboot the router before it has completely written configuration updates
to the flash card, the router starts with the last saved configuration. If you reboot
the router after it has written the configuration updates to the flash card, but
before it has applied those updates to actual configuration data, the configuration
update process resumes immediately following the reboot and is completed
before any application accesses its configuration data.
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Managing Flash Cards on SRP Modules
Chapter 6: Managing Modules
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