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discovery
iscsiadm -m discovery -t st -p <IP>
killall -HUP istgt
or
/usr/local/etc/rc.d/istgt reload
[LogicalUnit<##>] TargetName "<NAME>" TargetAlias "<NAME>" Mapping PortalGroup1 InitiatorGroup1 AuthMethod Auto UseDigest Auto ReadOnly No UnitType Disk UnitInquiry "FreeBSD" "iSCSI Disk" "0123" "10000001" UnitOnline yes BlockLength 512 QueueDepth 32 LUN0 Storage <PATH> <SIZE>|auto LUN0 Option Serial 100000010