Hard drives solid state computer, called SSD, working at a faster rate than traditional drives and operate in complete silence. SSDs are fully electronic in nature, and have no moving parts. Users can choose 1 of the 2 types of SSDs, one based on flash memory, and the other using a dynamic random access memory, or DRAM. The DRAM, the equipment used for main memory, is faster than flash memory and costs more.
The hard drive performance depends on the type of tasks access to data for which it is used. By simply reading the data, a flash based hard drive is about 100 times faster than a traditional album, although a combination of reads and writes place him at a disadvantage. Flash memory needs additional time to store data, and these units may further decelerate temporarily, and periodically reorganize. The DRAM units do not have these whims and run consistently between 4 and 400 times faster than flash models.
Since 2007, the DRAM units cost 4 times more than a flash drive of comparable size. In 2011, DRAM memory technology was still more expensive than flash memory in terms of storage space. When comparing costs per transaction of data per second, which takes the drive speed into consideration, DRAM models cost about 1/3 the cost of flash. The average PC user cannot justify the cost of DRAM, but large commercial and scientific operations can benefit from this technology, and managing large amounts of data.
Bulk storage and long term
For data storage block, flash drives make the most sense for two reasons. First, the DRAM is much more expensive. A customer can justify the higher cost of a DRAM-intensive. Large files with low levels of activity not take advantage of the speed of the DRAM. DRAM and flash are also distinguished by the fact that the DRAM is volatile, which means that loses its data when power is turned off. Flash, however, retains data even without power. Although the DRAM can operate with a battery backup system, cannot serve as long-term storage.
Individual cell data storage in flash memory suffers wear and tear, so life is limited. Reading data does not stress the cells, but does not write new data. DRAM, on the other hand, does not suffer any wear even after many billions of write operations. The problem of flash with the “resistance to write” was more significant to its beginnings. Although degrades over time, constant use decades now are needed, making it as reliable as the DRAM in practical terms.