Problem:
I was running a V5 demo, and I purchased a V6 license, but after booting from the V6, I can see the targets in the VMware machine but can not see the data inside. Any idea?
Solution:
Make sure to change the iSCSI solution. DSS V5 use "IETD iSCSI" as default, and in V6 its SCST. You can switch back to IETD from the system console (ALT+CTRL+H->Tuning Option->iSCSI Daemon Option->iSCSI Solution).
Also, make sure to change the LVM signature from the VM side. That can be done from the "Advance Settings"