Hello,
I installed 6.3.6 version proxmox ve.I installed one ssd for system and create four hdd to zfs raid.I can see storage on web gui and used disk space.But I use "df -h" this command and switch to zfs directory.It's empty.What is this question?
That is normal. ZFS isn't working like other filesystems. df -h isn't working because every dataset is its own filesystem. If you want to see what used how much space you should use the zfs list command.