31-01-2012, 03:05 PM
Solid State Hard Disk
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INTRODUCTION ABOUT SOLID STATE HARD DISK
A solid-state drive (SSD) is a data storage device that uses solid-state memory to store persistent data. A SSD uses SRAM or DRAM .
The original usage of the term solid-state refers to the use of semiconductor devices rather than electron tubes.
With no moving parts, solid-state drives are less fragile than hard disks and are also silent
SSD Technology
Flash SSD’s are essentially arrays of flash memory devices which include a controller that electrically and mechanically emulate, and are software compatible with magnetic HDD’s.
DRAM Based SSD
SSDs based on volatile memory such as DRAM are characterized by ultra fast data access, generally less than 0.01 milliseconds.
DRAM-based SSDs usually incorporate internal battery and backup storage systems while no power is being supplied to the drive from external sources.
The problems with today’s Hard Disks?
Processors have increased in speed by orders of magnitude over the years.
But spinning hard disk drives (HDD) have not.
This difference has created a substantial performance gap between how fast processors demand data and how quickly HDD responds.
HDD speed lags behind processors because it is constrained by physical components.
