So, I have 4 2TB Drives in one pool which I want to provide completely as an iSCSI target. The pool size is 5.11TiB and the Volume I've inched forward to use it all up. But after connecting to it and initializing the drive I'm left with 4.61TB available space. That's a bit disappointing, I have an old Synology also with 4 2TB drives in a RAID5 that gives me a drive with 5.44TB available space. Did I something wrong??