I am going to be doing a post about some of the research I have found out, in relation to SSD or Solid-State Hard Drives.
- it contains no actual “disk” of any kind, nor motors to “drive” the disks
- it is a data storage device using integrated circuit assemblies as memory to store data
- an SSD uses electronic interfaces compatible with traditional block input/output (I/O) hard disk drives
- SSDs have no moving mechanical components
SSDs had origins in the 1950s with two similar technologies: magnetic core memory and card capacitor read-only store. These auxiliary memory units emerged during the era of vacuum-tube computers. But with the introduction of cheaper drum storage units their use ceased.
In the 1970’s the prohibitively high price of the built-to-order SSDs made them quite seldom used.
In 1978, Texas Memory Systems introduced a 16 kilobyte RAM solid-state drive to be used by oil companies for seismic data acquisition.
The Sharp PC-5000, introduced in 1983, used 128 kilobyte solid-state storage-cartridges containing bubble memory.
Software-based RAM Disks are still used as of 2009 because they are an order of magnitude faster than the fastest SSD, though they consume CPU resources and cost much more on a per-GB basis.
In 1995, M-Systems introduced flash-based solid-state drives. They had the advantage of not requiring batteries to maintain the data in the memory (required by the prior volatile memory systems), but were not as fast as the DRAM-based solutions.
Solid State Hybrid Drive
- category of storage that incorporates NAND flash
- an SSDH is a SSD, resulting in a single, integrated device, with HDD technology such as:
- The combined use of separate SSD and HDD devices installed in a single computer with overall performance optimization managed by the computer user or by host operating system software. An example of this type of solution is Apple’s “Fusion” Drive.