Solid State Drives
Most of the memory in computer systems this day and age is what we call volatile. That is, the data that is stored in memory is not permanently saved and will be lost when a system is shut down or restarted. However, there are drives that can be used to store this data and they are now appearing in a number of different laptop computers. One such drive is a solid state drive or SSD, which was first developed in 1978 by StorageTek.
A solid state drive is a type of data storage device that uses solid state to store data that needs to be kept permanently or for a long period of time. It uses static random access memory (SRAM) or dynamic random access memory (DRAM) and acts very similar to an actual hard drive in a computer. However, compared to a computer hard drive solid state drives are mechanically stronger, have low latency when searching the drive for data, and are much quieter. The lack of moving parts in these drives has made them be mechanically stronger and helps reduce the risk of failure.
Although solid state drives have several advantages over other hard drive disks and even secure digital high capacity (SDHC) drives there is one major disadvantage, and that is their cost. Solid state drives are much higher in costs that the other types, costing as much as $15 per GB compared to less than $1 for other hardware types.
The current capacity of these drives is lower than the standard hard drive today, but the future for solid state drives though is still looking bright. Their storage capacity is expected to increase rapidly compared to other drive types and they are even testing 1TB systems. A number of companies are producing solid state drives including SanDisk and Lexar. With their future capacity and numerous benefits this type of drive is sure to be very popular.