Hi AllThis may seem the wrong place to post a more general question about storage but it does pertain more to how Proxmox does stuff with storage so I am asking for help and clarification. My setup is a PVE 2.1 cluster of 3 servers, that each have 2 separate NICs configured to connect to the iSCSI storage and a third NIC for Proxmox.The iSCSI target is on a server with a hardware RAID 1 2TB (2x2TB) array as /dev/sdb which I have given a GPT partition table for the whole 2TB as /dev/sdb1I set this up as a target using a stanza in /etc/iet/ietd.conf Target iqn.2012-08.net.testdomain:storage-group1.lun1IncomingUserOutgoingUserLun 0 Path=/dev/sdb1,Type=fileioAlias LUN1This is then matched with an entry in etc/iet/initiators.allow ofiqn.2012-08.net.testdomain:storage-group1.lun1 192.168.10.0/23 192.168.11.0/23At some point I will multipath this but for now it is just two networks.What I want to have is a proportion of the drive set as a logical volume for backups/isos etc which can be shared across all nodes and then more space as a volume group for images to allow for snapshots and live migration.I am sort of there with the theory, but from within the Proxmox environment I am not sure what is done where and when! I presume that Proxmox GUI is just attaching the iSCSI drive as an initiator as one might using the command line. However I am not so sure about the GUI volume group option and how it related to LVs and command line actions like lvcreate pvcreate etc. I feel like a complete noob with this, even though I have been messing with Linux for years this is just something I personally haven't played with much, so think I need a step by step bit of help to get the shape of things right in my head so I can build from there on. I am killing and rebuilding the whole cluster each time to be sure I have a known starting point so each step is taking a while to nail down - some shortcut help would be very much appreciated 
Thanks.
Thanks.