There are a few products the use primarily DRAM, usually backed by capacitors/batteries and flash. ZeusRAM SAS drive: http://www.stec-inc.com/product/zeusram.p

There are a few products the use primarily DRAM, usually backed by capacitors/batteries and flash. ZeusRAM SAS drive: http://www.stec-inc.com/product/zeusram.php http://www.stec-inc.com/product/zeusram.php RamSan rack-mounted: http://www.ramsan.com/products/rackmount-ram-storage/ramsan-440 http://www.ramsan.com/products/rackmount-ram-storage/ramsan-... Kaminario K2 SAN: http://www.kaminario.com/products/K2-Solid-State-SAN-Storage/ http://www.kaminario.com/products/K2-Solid-State-SAN-Storage...