Hi,
Free slots for expansion cards on the controller? I am not sure on how to show empty slots, but once you know your platform, you can use:
system controller config pci show-add-on-devices
and
run -node XXX-01 -command sysconfig -ac
Using ONTAP, for example:
XXX::> storage disk show -fields disk,firmware-revision,pool,owner,shelf
disk owner firmware-revision pool shelf
------- ------ ----------------- ----- -----
1.0.0 XXX-01 NA02 Pool0 0
There are many other fields to display as you wish...