PaloAlto Networks PA-5000 Series Hardware Reference Manual - page 24
Replacing the Fan Tray and Air Filter
26
• Maintaining the Hardware
Palo Alto Networks
•
Adding blank but different drive
In this scenario, the new drive is blank but has a different part number. This is the expected case
when migrating from standard to SSD drives. The system will start to boot, it will determine that
the drives are different, and then it will boot into maintenance mode with the reason “Drive model
mismatch.” You are then presented with the following options:
– Add the new drive to the array, ignoring the model mismatch. This is the expected case if hard
drive models are changed. In this case the drives will be compatible, but have different model
numbers. The drive will be added to the array and you will be given an option to reboot. Upon
reboot, the system behavior will be the same as if an identical drive was replaced.
– Migrate from one drive to the other. This will format the new drive to maximum capacity, copy
all contents from the old drive to the new drive, and add the new drive to the array. After the
migration process is completed, a message is displayed to power down the system, remove the
old drive, insert the new drive (if any), and power the system back on. If you are migrating from
a larger drive to a smaller drive, you are warned that all saved logs are removed because there is
no guaranteed that they will be fully copied.
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Adding old drive back into system
If two synced and running drives ever become unsynced, for example, because one drive was
removed for some time, the system will determine that two valid drives paired to the serial number
or the system are present and will boot into maintenance mode. In maintenance mode, you will be
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.
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.