iSCSI with SnapRAID and aufs pooling

I have installed OMV 1.1 (Linux 3.2.0 kernel) together with SnapRAID and Aufs. Pooled my two content discs together as per guide on this forum. The whole thing seems to work great.
I exported the poolshare as NFS. My LDAP/application server (both OMV and LDAP/application server are VM's) is mounting the NFS export fine.

I was good to go and wanted to replace my current system with this new setup until... I found out about the iSCSI-target plugin. I installed it (had some hickups with headers missing but fixed that) and now I want to make a LUN out of the poolshare and feed it to my LDAP/app server. When I add a new LUN the device list is empty. See attached.

Is it possible to iSCSI a pooled SnapRAID storage?

Zitat von ryecoaaron

...If you use just the drive with the aufs pool, maybe you could??

But how, the device list is empty. Should I edit .conf file manually? Without OMV gui?

I'm allright with having to format my pool again. In my setup the LDAP machine should do that. But how to enable the device with SnapRAID/aufs layer on top (or in between)?

I was curious about the performance increase of iSCSI. NFS will be sufficient for now. Thanks.