Tuesday, December 13, 2011

Solid State Hard Drives

Solid State Hard Drives give performances 100 to 200 times than fastest magnetic hard drives. Other than speed reliability and durability are advnatages. Solid-states drives are reliable in vibration and shock as there are no moving components in the device.

Basic components of a typical solid-state hard drive.

Solid staed drives are made up of many SDRAM modules stacked on an array with a the supporting battery. They are very fast but the price is high. They are used in PCMCIA cards, flash cards, etc. Solid state hard drives are made up entirely of RAM modules. It uses standard SDRAM modules to store information. SDRAM is volatile memory. it loses its information when there is no power. A rechargeable lithium-ion battery used to provide power when AC power is unavailable.

A high-end magnatic hard drive has an I/O rate of about 60 to 90 IO s/sec. A solid-state disk in comparison can range from 5000 to 9000 IO s/sec. A high-end conventional hard drive has an average access time of 6 to 8 milliseconds. A solid-state disk in comparison has an average access time of 50 to 100 microseconds. Applications like video editing and mission critical issues can take advantage of the speed benefits.

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