[Contents]
[Prev]
[Next]
[Index]
[Report an Error]
Flash Features
The software contains a number of features that
optimize the way the router restores its configuration if it is shut
down improperly:
- The router tracks improper shutdowns.
- After an improper shutdown, the router runs an investigation
of the file allocation table (FAT) the next time it reboots.
- The router creates backups of critical files.
- When you install a new flash card or restart the router
after shutting it down incorrectly, a utility scans the flash card
to detect corrupt sectors. If the utility finds files or directories
that contain corrupt sectors, it removes the files and directories,
because they can no longer be used. The utility also fixes problems
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.
[Contents]
[Prev]
[Next]
[Index]
[Report an Error]