Configuring Automatic Mirroring of the CompactFlash Card on the Hard Drive
You can direct the device hard drive to automatically
mirror the contents of the CompactFlash card. When you include the mirror-flash-on-disk statement, the hard drive maintains a
synchronized mirror copy of the CompactFlash card contents. Data written
to the CompactFlash card is simultaneously updated in the mirrored
copy of the hard drive. If the CompactFlash card fails to read data,
the hard drive automatically retrieves its mirrored copy of the CompactFlash
card.
We recommend that you disable flash-to-disk mirroring when you upgrade or downgrade the router.
You cannot issue the request system snapshot command while flash-to-disk mirroring is enabled.
To configure the mirroring of the CompactFlash
card to the hard drive, include the mirror-flash-on-disk statement at the [edit system] hierarchy level:
[edit system] mirror-flash-on-disk;
After you have enabled or disabled the mirror-flash-on-disk statement, you must reboot the device
for your changes to take effect. To reboot, issue the request
system reboot command.
This feature is not supported in Junos OS Release 20.1.