Linksys NSS4000 Technical Bulletin page 5

Rebooting the NAS Using the External USB Flash Drive
1. Power off the system.
2. Remove any USB memory devices connected to the system. The uninterruptible power supply (UPS) can remain connected.
3. Insert the external USB flash drive that contains a
recommend you use the AUX-2 port for rebooting the NAS so that the USB port on the front panel can be used for saving your
configuration.
NOTE: The recovery vmlinux files for NSS4000 and NSS6000 are different; make sure you have the correct file installed on the USB
flash drive.
4. Power on the system. After 3-5 minutes, the power LED flashes green, indicating that the system has booted from the external
recovery USB flash drive. As soon as the power LED flashes green, remove the external USB flash drive.
NOTE:
If you do not remove the external USB flash drive within 10 seconds after the power LED flashes green, the system fails to boot.
Return to Step 1.
5. Let the system boot fully (indicated by the power LED displaying steady green and the System LED turned off ). This takes an
additional 3 to 4 minutes.
6. Insert the recovery USB 2.0 flash drive into the AUX-2 port again.
IMPORTANT: Leave the external USB flash drive permanently inserted in the unit.
Upgrading the NAS Firmware
Before performing the firmware upgrade, make sure the recovery USB flash drive is inserted into either the USB port on the front
panel or AUX-2 port on the back of the NAS.
IMPORTANT: If the recovery USB flash drive is not inserted into either the USB or AUX-2 port, the system will fail to automatically
boot after you perform Step 5.
The firmware upgrade takes about 13 minutes. To upgrade the firmware:
vmlinux file into the AUX-2 port on the back of the failed system. We
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