Synchronizing Flash Cards Of Different Capacities; Disabling Autosynchronization - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - SYSTEM BASICS CONFIGURATION GUIDE 2010-10-04 Configuration Manual

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Use to force the file system of the redundant SRP module to synchronize with the flash
file system of the primary SRP module.
If you synchronize the redundant SRP module with the primary SRP module and the
redundant module is armed with a release different from the one it is currently running,
the redundant SRP module is automatically rebooted to load the armed release.
Optionally, you can use the low-level-check keyword to force the router to validate
all files or only configuration files in NVS, and to synchronize all files that failed the
checksum test during the flash-disk-compare command as well as any other files that
are unsynchronized. See "Validating and Recovering Redundant SRP File Integrity" on
page 370 for details.
NOTE: In most cases, use the synchronize command instead of the
synchronize low-level-check command. The synchronize low-level-check
command is provided for troubleshooting, and is intended to be used under
direction from JTAC.
Examples
host1#synchronize
host1#synchronize low-level-check all
host1#synchronize low-level-check configuration
There is no no version.
See synchronize.

Synchronizing Flash Cards of Different Capacities

If the capacity of the primary flash card is equal to or smaller than that of the redundant
flash card, the router copies all the files from the primary flash card to the redundant
flash card. However, if the capacity of the primary flash card exceeds that of the redundant
flash card, the router creates a hidden synchronization reserve file on the primary flash
card, provided enough space is available for the file.
The purpose of the synchronization file is to prevent the creation of data that cannot fit
on the redundant flash card. The file contains no useful data, and does not appear when
you view the files in NVS. The size of the file is equal to the difference in capacities of the
two flash cards. For example, if the primary flash card has a capacity of 224 MB, and the
redundant flash card has a capacity of 220 MB, the size of the synchronization file is 4 MB,
and only 220 MB of space is available on the primary flash card.
If the primary flash card does not have enough space to create the synchronization reserve
file, the synchronize command fails, and you see a warning message on the console. To
resolve this issue, either delete unwanted files from the primary flash card or replace the
redundant flash card with a higher-capacity flash card.

Disabling Autosynchronization

If autosynchronization is enabled while you are copying long scripts or installing new
software releases, it detects a disparity between the modules during the middle of the
Chapter 6: Managing Modules
369