HP SAN P2000 G3 - General iSCSI Mapping Questions

Greetings.  We have an HP P2000 iSCSI G3 SAN (one enclosure).  I have two active iSCSI hosts (the including graphics show a 3rd one - middle one with "no access" - question about that one later).

I have two Vdisks, each with one one volume of RAID 5 disks set up.

1. Let's start with LUNs. How is it possible to have the same LUN number mapping two different Vdisk volumes to two different hosts ?  Is the LUN unique only to a specific volume ?  Or does HP consider a "LUN" to be something else ?

2. On VDISK2 (volume 2), the Default mapping is actually to my *other* host, not the specific one I want to map to.  I needed to create an Explicit mapping to the host I wish to connect to.  I've tried changing the "Default" for this VDISK volume, but have not been successful.  Does anyone have specific experience with this HP SAN who could guide me here ?

3. For VDISK1 (volume 1), you'll notice there are *two* Defaults.  How is this possible ?  I want one Default to map to the top host.

Everything actually works now, so if I don't need to change anything, that's fine.  We have had issues when we first set up the SAN that broke access from one host when we set up a second one (sorry, I can't recall the exact mappings back then).

Vdisk1 (volume 1)
Vdisk2 (volume 2)

Thanks much.
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lapavoniAuthor Commented:
I resolved this by restarting each controller.  The middle host (I forgot to mention that this one is no longer active, but still showed up) was removed.  I was then able to set one host as "explicit" while the other was "default" on each vdisk volume.

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