IBM ServeRAID 8k SAS - 25R8064 Manufacturer: IBM Manufacturer ID: 25R8064 Category: Server Options IBM ServeRAID 8k SAS - 25R8064 - Summary IBM ServeRAID 8k SAS Controller option provides 256 MB of battery backed 533 MHz DDR2 standard power memory in a fixed mounting arrangement. The device attaches directly to IBM planar which can provide full RAID capability.