ZFS over iSCSI Question

[EagleTG]

Should iscsiadm -m session always show an active session when utilizing ZFS over iSCSI (to a FreeNAS server in this case)?

The following is after a fresh reboot of the entire environment...
One of my Proxmox hosts, this is host 172.20.___.__2:

iscsiadm -m session
tcp: [1] 172.20.___.__1:3260,1 iqn.2005-10.org.freenas.ctl:freenasblk01 (non-flash)

The other Proxmox host (configured exactly the same), this is host 172.20.___.__5:

iscsiadm -m session
iscsiadm: No active sessions.

From the other side (the FreeNAS server):

ctladm islist
  ID Portal           Initiator name                       Target name                        
   1 172.20.___.__2   iqn.1993-08.org.debian:01:e38913619569 iqn.2005-10.org.freenas.ctl:freenasblk01
   9 172.20.___.__2   iqn.1993-08.org.debian:01:e38913619569 iqn.2005-10.org.freenas.ctl:freenasblk01
  10 172.20.___.__2   iqn.1993-08.org.debian:01:e38913619569 iqn.2005-10.org.freenas.ctl:freenasblk01
  11 172.20.___.__2   iqn.1993-08.org.debian:01:e38913619569 iqn.2005-10.org.freenas.ctl:freenasblk01
  12 172.20.___.__2   iqn.1993-08.org.debian:01:e38913619569 iqn.2005-10.org.freenas.ctl:freenasblk01
  13 172.20.___.__2   iqn.1993-08.org.debian:01:e38913619569 iqn.2005-10.org.freenas.ctl:freenasblk01
  14 172.20.___.__2   iqn.1993-08.org.debian:01:e38913619569 iqn.2005-10.org.freenas.ctl:freenasblk01
  15 172.20.___.__5   iqn.1993-08.org.debian:01:86d7850f0b iqn.2005-10.org.freenas.ctl:freenasblk01

Note, I am unsure if it matters, but the 172.20.___.___5 host currently has 1 VM on it that happens to be a Windows machine. It's running VirtIO SCSI to a VirtIO Block Disk. The other host (172.20.___.__2) has 6 VMs running, all but one are VirtIO SCSI with a VirtIO Block Disk. The other is VirtIO SCSI with a SCSI disk.

Weirdly, there are 7 connections. If it was something I was missing with the VirtIO Block vs SCSI disk (for example), I'd expect that I'd see *5* connections to the FreeNAS environment from that host.

Why am I not seeing what I think I should be from the iSCSI side of things?
Thanks again!

 

[EagleTG]

Hmm, maybe I found the answer to my question with dcsapak's reply here:
https://forum.proxmox.com/threads/zfs-over-iscsi-uses-iscsiadm.58719/

Can anyone point me to documentation or more information on this? I feel like I'm still not understanding this properly.