what exactly did you resize, and where does it show correct,and where not? what kind of filesystem layout did you choose?
did you extend the partition/fs? lvm?
Sorry for not enough info. PBS is a vm on pve. I've resized disk on pve. On PBS tab "Storage / disks" it shows me device with new size.
I've resized partition with cfdisk too but df -h shows me old size of partition.
