Mapping from iSCSI session to device.

I was monitoring my system, so I knew the file was /dev/sdb was the new iSCSI target I was trying to turn into a file system. TO provide it, I ran:

iscsiadm -m session --print=3

And saw:

		scsi4 Channel 00 Id 0 Lun: 0
		scsi4 Channel 00 Id 0 Lun: 1
			Attached scsi disk sdb		State: running

But what did that do? Using Strace helped me sort it a little. I worked backwards.

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