The 2012 budget did not allow for flexible choices of hardware or storage. The RHIC experiments were not asked for partitioning (1/2 and 1/2 was done for STAR and PHENIX and essentially coverred for new farm nodes). Storage was handled via a replacement of old storage by newer storage media (and we doubled out space).
Since several institutional disk space bills were pending (unpaid), that possibility did not offer itself either. See the 2011 requirements for where we were.