Failsafe Mode - Safran WR-Z16 User Manual

8.5

Failsafe Mode

The Failsafe mode allows to only load the minimal Linux services (i.e., logging, net-
work, ssh, web) but using the normal firmware stored in SD card. It has been
mainly designed for advanced users that might have blocked the startup of the
device through a bad customization of init.d services.
So, if after a failed customization, a device does not provide a usable access to its
console (ssh or UART), the failsafe mode can be entered by following the pro-
cedure:
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1. Power cycle the device.
2. Wait 30 second until the kernel starts loading.
3. Press Reset Button (#2) for more than 30s until Status LED (#3) starts blink-
ing several times in yellow. This mean that the failsafe mode has been
triggered.
4. Remove/fix the custom scripts that were blocking the OS initialization.
Note: Factory reset vs. Failsafe mode: If the device initialization is
blocked due to a custom script, it might be easier to directly perform
a factory reset even if this means that the device will lose all its con-
figuration.
8.5 Failsafe Mode
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