I think it was back when SATA disks were not dual ported and so they could only be owned by one SP.  that was quite awhile ago but they might not have removed that from the GUI when creating SATA lun's.  I just create what i need and then balance them after they are created.
in CX4-120 unisphere 30  why i am unable to distribute the lun owner, when creating luns in a RG conformed with SATA II disks, (1 RG with 1teras, and 1 RG with 2 teras ) . If i create the first RG of Sata II disks the owner of all the luns is SP A if i create the second RG of SATA II disks the owner of all the luns is SPB  now if i use create POOL instead of RaidGroups why POOL shows me, when creating luns, in advanced tab, in the luns distribution, i can choose A or B or auto  and why if it is a RG, when creating luns, in the luns distribution, i can not choose A, or B. or Auto, its already chosen  what is the advantage between using POOLs or RaidGroups.  thnks Maynor
why in CX4-120 unisphere 30, in a RG Sata II, creating luns, unable balance SP