Doesn't appear to be any change
pve-01:~# iscsiadm -m session --rescan
Rescanning session [sid: 1, target: iqn.2005-10.org.freenas.ctl:ssd-z2-x10-600gb-2, portal: 10.202.202.5,3260]
Rescanning session [sid: 2, target: iqn.2005-10.org.freenas.ctl:ssd-z2-x10-600gb-1, portal: 10.202.202.5,3260]...