Hardware reference guide

Palo Alto Networks Maintaining the Hardware • 25
Replacing the Fan Tray and Air Filter
required to select which drive is primary and then given the option to reboot. Upon rebooting, the
system will add the secondary drive to the primary drive’s RAID array and then the system
behavior will be the same as if an identical drive was replaced. Note that it may require one extra
automatic reboot to correctly set up the system (due to how automatic RAID selection works).
Replacing the Fan Tray and Air Filter
To replace the fan tray and air filter:
1. Identify the fan failure using the system log or fan LED.
2. Make sure the new fan tray is unpacked and ready to slide into the chassis.
3. Loosen the thumbnail screws for the fan tray bay using a flat or Phillips head screw driver, if
necessary.
Figure 17. Loosening the Thumbnail Screws for the Fan Tray and Air Filter
Note: You can replace the fan tray while the firewall is powered on; however, you
must replace it within 20 seconds, or the thermal protection circuit will
automatically shut down the firewall.