16 Oct 2013

Solid State Drive (SSD)

intel ssd
Things have heavily changed in this age of technology. One of the most revolutionary change in "Storage Division" for Desktop and Laptop is "Solid State Drive (SSD)".
Today's article is about  " SSD vs HDD





What is SSD ?

SSD is a short form of "Solid State Drive". It also known as DRAM based storage disk, Electronics Storage disk. Wikipedia say's:- SSD  is a data storage device using integrated circuit assemblies as memory to store data persistently. SSD technology uses electronic interfaces compatible with traditional block input/output (I/O) hard disk drives, thus permitting simple replacement in common applications. Also, new I/O interfaces like SATA Express are created to keep up with speed advancements in SSD technology.

SSD mainly use NAND base flash memory.It retains data without power. For applications requiring fast access, but not necessarily data persistence after power loss, SSDs may be constructed from random-access memory (RAM). Such devices may employ separate power sources, such as batteries, to maintain data after power loss.

An SSD does not have a mechanical arm to read and write data, it instead relies on an embedded processor (or “brain”) called a controller to perform a bunch of operations related to reading and writing data. The controller is a very important factor in determining the speed of the SSD. Decisions it makes related to how to store, retrieve, cache and clean up data can determine the overall speed of the drive. We won’t get into the nitty-gritty details for the various tasks it performs such as error correction, read and write caching, encryption, and garbage collection to name a few. Yet, suffice to say, good controller technology is often what separates an excellent SSD from a simply good one. An example of a fast controller today is the SandForce SATA 3.0 (6GB/s) SSD controller that supports burst speeds up to 550MB/s read and write speeds.
SSD Vs HDD:-
Now it’s time to do some comparisons and determine which might be best for your individual needs - SSD or HDD?  The best way to compare items is a table with a side by side comparison of items in which a green box indicates an advantage:



Attribute
SSD (Solid State Drive)
HDD (Hard Disk Drive)
Power Draw / Battery Life
Less power draw, averages 2 – 3 watts, resulting in 30+ minute battery boost

More power draw, averages 6 – 7 watts and therefore uses more battery
Cost
Expensive, $1.00 per gigabyte (based on buying a 240GB drive)

Only around $0.075 per gigabyte, very cheap (buying a 4TB model)
Capacity
Typically not larger than 512GB for notebook size drives

Typically 500GB – 2TB for notebook size drives
Operating System Boot Time
Around 22 seconds average bootup time

Around 40 seconds average bootup time

Noise
There are no moving parts and as such no sound

Audible clicks and spinning can be heard
Vibration
No vibration as there are no moving parts

The spinning of the platters can sometimes result in vibration

Heat Produced
Lower power draw and no moving parts so little heat is produced
HDD doesn’t produce much heat, but it will have a measurable amount more heat than an SSD due to moving parts and higher power draw

Failure Rate
Mean time between failure rate of 2.0 million hours

Mean time between failure rate of 1.5 million hours
File Copy / Write Speed
Generally above 200 MB/s and up to 500 MB/s for cutting edge drives

The range can be anywhere from 50- 120MB / s
Encryption
Full Disk Encryption (FDE)Supported on some models

Full Disk Encryption (FDE) Supported on some models
File Opening Speed
Up to 30% faster than HDD
Slower than SSD

Magnetism Affected?
An SSD is safe from any effects of magnetism
Magnets can erase data

So it's time to get update your HDD to SSD I think.
The Main Advantage:-


  • Slim and Very Light in Weight.
  • High Speed Than HDD
  • No Sound as it Has No Motor
  • No Magnetic Problem
  • Less Boot Time Than HDD...........
  • Auto Save Data

Enjoy !!!
Thank You..