Intel and Micron have the 3D XPoint memory. 600 of the 128 gigabit chips would be about 9 TB of data.
2 Terabyte solid state flash drives are about $750
3D Xpoint has 128 gigabit array memory chips which is non-volatile (does not electricity to retain memory) and has 10s nanosecond read latency.
Volume production at a fabrication plant in Utah is expected in 2016. Claimed operating speed and write durability are both up to 1,000 times higher than flash memory.
While NAND flash uses electric charge and block addressing to store data, 3D XPoint uses electrical resistance and is bit addressable. Individual data cells do not need a transistor, so packing density will be 8-10 times greater than DRAM, and similar to NAND. Operating speed is expected to be slower than DRAM, while price per bit will be higher than NAND and lower than DRAM.