[b] Hard Disk Drive (HDD)[/b] [b]Components:[/b] HDD contains moving parts - a motor-driven spindle that holds one or more flat circular disks (called platters) coated with a thin layer of magnetic material. Read-and-write heads are positioned on top of the disks; all this is encased in a metal case. [b]Weight:[/b] HDDs are heavier than SSD drives. [b]Heat, Electricity, Noise:[/b] Hard disk drives use more electricity to rotate the platters, generating heat and noise. [b]Dealing with vibration:[/b] The moving parts of HDDs make them susceptible to crashes and damage due to vibration. [b]Speed:[/b] HDD has higher latency, longer read/write times, and supports fewer IOPs (input output operations per second) compared to SSD. [b]Defragmentation:[/b] The performance of HDD drives worsens due to fragmentation; therefore, they need to be periodically defragmented. [b]----------------------------------------------------------------------------------[/b] [b]Solid State Drive (SSD)[/b] [b]Components:[/b] SSD has no moving parts; it is essentially a memory chip. It is interconnected, integrated circuits (ICs) with an interface connector. There are three basic components - controller, cache and capacitor. [b]Weight:[/b] SSD drives are lighter than HDD drives because they do not have the rotating disks, spindle and motor. [b]Heat, Electricity, Noise:[/b] Since no such rotation is needed in solid state drives, they use less power and do not generate heat or noise. [b]Dealing with vibration:[/b] SSD drives can withstand vibration up to 2000Hz, which is much more than HDD. [b]Speed:[/b] SSD has lower latency, longer read/write times, and supports more IOPs (input output operations per second) compared to HDD. [b]Defragmentation:[/b] SSD drive performance is not impacted by fragmentation. So defragmentation is not necessary. [b][url=http://www.diffen.com/difference/HDD_vs_SSD]Source[/url][/b]

Last edited by vanraid (2012-08-18 06:20:32)