http://elitepcbuilding.com/ssd-vs-hdd

 

The table below gives a pretty good compare and contrast between HDD vs SSD.

HDD vs SSD

Characteristic

Hard Disk Drive (HDD)

Solid State Drive (SSD)

Sensitive to Magnets Magnets will alter or destroy data Magnets have no effect on data
Power Consumption 7 Watt average 2 Watt average
Time to Spin Up Up to 2 seconds before HDD can read/write to drive Instantaneous, able to read/write immediately
Read Speed (SATA) Roughly 100MB/s, can very depending on level of fragmentation 230 MB/s
Write Speed (SATA) 50-70 MB/s, can very depending on level of fragmentation 130-170 MB/s
Lifespan May fail due to vibrations or impact, usual MTBF of 1,500,000 hours (171 years)
No finite number of writes
MTBF of 2,000,000 hours, AKA 228 years.
Or about 40 years of non-stop writing due to write cycle limits
Encryption HDD's can overwrite encrypted data right on top of the old data SSD's need a secure erase feature or total partition encryption. (Can not overwrite data, data must be erased first)
Cost HDD's cost about $0.11 USD per gigabyte as of 3/17/2011 Solid state drives cost about $1.80 USD per gigabyte as of 3/17/2011
Sensitivity to Shock Very sensitive, hard disk drive heads and disks may break due to shock or vibration Solid state drives have no moving parts and are very resistant to shock and vibration
Fragmentation Level of fragmentation of an HDD will significantly reduce read/write speeds No need to defragment solid state drives due to not having any read/write heads to find the data
Appearance HDD hard drive OCZ SSD
High Performance
Example
Western Digital Caviar Black 640GB 3.5" SATA 3.0Gb/s Internal Hard Drive -Bare Drive OCZ Vertex 2 OCZSSD2-2VTXE120G 2.5" MLC Internal Solid State Drive (SSD)
Last Updated on Tuesday, 12 April 2011 00:42

 

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