https://www.truenas.com/community/threads/adding-an-external-iscsi-share-to-truenas-scale.108988/


First off I have an external Drobo B1200i and it has a lot of storage on it and I don't want it to go to waste. So I was struggling with how to provision its storage into the TrueNas Scale server I have. I searched and searched and ultimately TrueNas is built to serve up shares not consume them. Drobo B1200i only allows shares in iSCSI so I was in a pickle.

Ultimately I found I could add in iSCSI external shares from the terminal at the os layer and then serve up that storage to the application layer through TrueNas. Below are the commands I ran to make it all work. Hopefully, it helps someone else.

OS Version:TrueNAS-SCALE-22.12.0
Product:Z10PA-D8 Series
Model:Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
Memory:63 GiB

#ssh as root
cd /

#Confirm what disks you have mounted already, screenshot to compare later
lsblk

#make apt executable
chmod +x /usr/bin/apt

#update the apt list and install open-iscsi

apt update
apt -y install open-iscs

#Start the iscsid service
service iscsid start

#Check Targets
/sbin/iscsiadm -m discovery -t sendtargets -p 192.168.1.202
192.168.1.201:3260,0 iqn.2005-06.com.drobo:b1200i.drb142801000133.id0
192.168.1.202:3260,0 iqn.2005-06.com.drobo:b1200i.drb142801000133.id0
192.168.1.203:3260,0 iqn.2005-06.com.drobo:b1200i.drb142801000133.id0

#Add iscsi source ( Drobo B1200i )
/sbin/iscsiadm -m node -T iqn.2005-06.com.drobo:b1200i.drb142801000133.id0 -p 192.168.1.202:3260 --login

#Logging in to [iface: default, target: iqn.2005-06.com.drobo:b1200i.drb142801000133.id0, portal: 192.168.1.202,3260]

#Login to [iface: default, target: iqn.2005-06.com.drobo:b1200i.drb142801000133.id0, portal: 192.168.1.202,3260] successful.

#run disk command again to check for new mounted iscsi drive and what the system thinks it is.
lsblk
fdisk -l

#for me it came back as sdc 1 and respectively 2

#Make the directory to mount it to.
mkdir /mnt/B1200i
mount /dev/sdc1 /mnt/B1200i

#At this moment I have my old “disk” available but need to import it into the existing storage pool.

#I had to export/detach the pool so that I could import the pool back