Help - StorageWork X1600 G2 weird lun cannot being use

[tacccccc]

forgive my bad English.

I'm newbie for this appliance.
My x1600 capacity is 12TB SATA,
I was created a 6TB Lun on Array B,
this one I attach to ESXi,
recently I attempt to expand it,
and wizard says haven't enough space,
so I found another lun(3TB) on Array B, (I haven't create it)
This lun can see it on ACU, can't see on ASM,
and I can't delete or mount it,
It just appear on x1600 Windows diskmanagement automatically,
Is this a default lun?
why can't I mount it to other server?
I can't even umount it from x1600 Windows.

This thing drives me crazy,
Attachment have 4 screenshot print this condition, can somebody help me, plz ...