JEDEC Announces Support for Hybrid NVDIMM Modules
http://www.eetimes.com/document.asp?doc_id=1326739&The standards work is being done by JEDEC’s JC-45 Committee for Memory Modules, which developed the non-volatile DIMM (NVDIMM) taxonomy in collaboration with Storage Network Industry Association’s NVDIMM Special Interest Group (SIG), a sub-committee of SNIA’s Solid State Storage Initiative.
The new standard defines hybrid DDR4 memory modules as those that plug into standard DIMM sockets and appear like a DDR4 SDRAM to the system controller, yet contain non-volatile memories such as NAND flash on the module. These hybrid module families may share the memory channel with other standard DDR4 DIMMs. Publication of the standard is expected later this year, said Bill Gervasi, co-vice-chair of the JEDEC JC-45 Committee for DRAM Modules, in an interview EE Times.
The JEDEC standards cover two versions of hybrid modules: the NVDIMM-N, which combines DRAM and NAND flash where the flash provides backup and restore of all DRAM for reliable data persistence in the event of a power failure; and the NVDIMM-F, which provides directly addressable NAND flash that is accessed as a block oriented mass storage device.