A solid-state storage device that uses integrated circuit assemblies as memory to store data. SSD technology primarily uses electronic interfaces compatible with traditional block input/output hard disk drives (HDDs), which permit simple replacements in common applications. New I/O interfaces like SATA Express and M.2 have been designed to address specific requirements of the SSD technology.
Solid State Drive are replacing traditional hard-disk drives. SSD solutions target higher read/write performance, increased reliability, and lower power consumption than their mechanical predecessors. Key performance vectors of SSDs are: Write Endurance/Performance, Error/Defect Rates, and Data Security. Design challenges include size and heat dissipation reductions.
Power Supply Efficiency and Heat:
Heat and heat tolerance is a key concern in device selection for Client SSD solutions considering that the drives may be used in RAIDs/Notebook PCs which have a significant power dissipation on their own. A typical Client SSD can draw 2-4 amps in typical operation. When size/storage capacity increases, Client SSDs use more power as additional memory is used to run system tasks.
Power supply units with less noise and higher efficiency will increase the longevity of the Client SSD by reducing the internal heat environment. More efficient PMUs can also decrease the number of erroneous rewrites by providing more stable voltage rails for the NAND and FLASH memory cells. It is important to select power solutions that have good efficiency at light/full loads since the drive can spend most of it's time in standby mode. Concurrently, power solutions ramp up and become stable more quickly without exceeding the regulation voltage limitations. This allows the SSD solutions to awaken, accept/process data and return to standby in a shorter timeframes.
For SSDs, SATA is the common interface. First generation has a maximum transfer rate of 1.5 Gbits/s, while the 2nd and 3rd generation supports between 3gb-6gb/s on average. The interface drivers are usually designed into core chips set within the drive. Considerations may need to be made for ESD protection or transient suppression on all connections. M.2 (or NGFF-Next Generation Form Factor) is becoming increasingly popular in applications needed to take up less space, and can support both SATA and PCIe interfaces at a maximum transfer rate of 6 gb/s.
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