In the center of the COL-SSD, a 32-bit SPARC processor controls an array of 128 GB raw NAND-flash memory through which (video) data is streamed in real time. The memory is key to the flawless operation of the recorder over its expected lifetime use in ISS. In order to maximize NAND-flash lifetime, the data needs to be spread evenly across all memory cells. Since raw NAND-flash relies on a flash media driver to take care of this, as well as performing bad-block management, it puts a load on the CPU. Since the data potentially needs to be stored on the SSD, a reliable file system is an additional requirement. The selected file system must not steal cycles from the CPU and must not cause the system to enter an undefined state after a sudden power loss. Read more  [Source:]