INSIDE THE HGST ULTRASTAR SSD800MM
The SSD800MM is housed in a 15mm, 2.5″ aluminum housing. There are a total of 8 screws holding it all together; 4 holding the top cover and 4 holding the main board to the back assembly.
After taking off the top cover you notice a conductive pad between the NAND and the housing. Removing the main board exposes conductive pads on the other side of the housing.
The controller is a joint venture between Intel and HGST and has 12 channels. Next to the controller are two DDR3 DRAM packages from Micron that total 1GB.
Each side of the board has 9 enterprise 25nm MLC NAND packages, for a total of 18. Each package contains 32GB of NAND for a total of 576GB in our 400GB version. Large amounts of over-provisioning is common on enterprise SSDs, but at 44%, HGST is on the high side.
Finally, instead of a large bank of surface-mount capacitors, HGST followed Intel’s S3500/S3700 lead with a single through-hole capacitor.