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 |
|
|
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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