Palo Alto Network 5260 was discovered in Performance Management, but there is no Disk / Storage utilization statistics.
For the Host Resource Storage Vendor Certification just the Memory Metric Family is supported.
DX NetOps Performance Management: Any release
Even though the Palo Alto Networks 5260 device is supported, the Partition Metric Family is only associated to the Physical Server Monitoring Profile which is attached to the All Servers Collection/group name.
https://netops-certification.broadcom.com/vendors(default-header:vendors)
Make a copy of the Physical Server Monitoring Profile, remove the undesired Metric Families like CPU, Generic Disk, Memory, System Statistics, and Virtual Memory.
Then attach it to the All Manageable Devices Collection/Group Name.
1) In Monitoring Profiles, search for Physical Server, click on Copy button and supply the new Name and Description for the Monitoring Profile. Just keep the Partition Metric Family, remove all the others. Then save the changes.
2) In Monitoring Profiles, search for newly created Monitoring Profile (Storage Utilization). Select it, click on the Collections tab and click on Manage button.
Select the All Manageable Devices Collection/Group Name and save the change.
3) The Partition Metric Family will be displayed under the Polled Metric Families of the Palo Alto Network devices.
4) If you create a Custom View like below, you will get the Partition Utilization.