The request system clone-system-disk command used to migrate the
system disk to 224 GB is not available on Panorama virtual appliances in dedicated
Log Collector (LC) mode on PAN-OS 11.1.12 and earlier PAN-OS 11.1 releases, and
PAN-OS 11.2.8 and earlier PAN-OS 11.2 releases.
If your appliance is running an affected version, use one of the following
options:
Recommended: Upgrade the appliance to a fixed PAN-OS version (11.1.13
or later, 11.2.9 or later, or 12.1.2 or later) and then expand the system
disk while the appliance remains in Log Collector mode.
Workaround: Temporarily switch the appliance to Panorama mode, expand
the system disk, and then switch back to Log Collector mode.
Switching to Panorama mode causes loss of all stored logs.