Storage device- uses ELECTRONIC CIRCUITS & No moving parts to store data ELECTRONICALLY. (e.g USB Flash Drive)
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What is Optical Disk Storage & an example?
Stores media that is written/read with LASERS. Disk spin to allow laser to read from correct location. Surface has billions of locations where holes = burned or not burned (1 or 0). E.g. = CDs/DVDs/Blu-ray.
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What is Magnetic Storage & example?
Includes Internal hard disk. A circular disk spins to allow disk's READ-WRITE Head to access data in specific segment- Happens QUICK (7,200 revolutions per min.)
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What is Cloud Storage?
Data is stored AWAY from computer accessed on- stored on other machines. Data is accessed over Internet. Cloud storage is not physical.
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Solid State Capacity?
Typically range from 1GB to 64 GB- higher capacities being developed.
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Optical Disk Capacity?
CDs: 700 MB. DVDs: 4.7 GB. Blu-Rays: 25 GB.
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Magnetic Storage Capacity?
Variable- new computers can have disks with capacities measured in Terabytes
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Cloud Storage Capacity?
Virtually unlimited- though normally must pay for space you use
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Solid State Speed?
USB 2.0 technology transmits data at 5 million bits per second
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Optical disk speed?
Highly variable- Blu-rays = much quicker than DVDs/CDs
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Magnetic Storage speed?
Data transfer from an internal drive is normally far quicker than external device
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Cloud storage speed?
Depends on internet connection speed- generally slower than physically storing data
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Solid State storage Portability?
Very small/light; designed to be moved between PC's
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Optical disk storage portability?
Small/light- not as easy to carry as USB flash drive.
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Magnetic storage portability?
Difficult and time consuming to move an internal drive from one machine to other
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Cloud storage portability
Excellent (if you have a working Internet connection)- no need to carry storage device & can be accessed from any where in world
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Solid state Durability?
USB flash drives = generally very sturdy
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Optical disks durability?
Quite sturdy, although scratched surface makes data irretrievable
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Magnetic storage durability?
Very well protected inside PC. Protected by sturdy metal case when removed.
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Cloud storage durability?
Cloud data normally backed up multiple times -> durability is not an issue.
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Card 2
Front
What is Optical Disk Storage & an example?
Back
Stores media that is written/read with LASERS. Disk spin to allow laser to read from correct location. Surface has billions of locations where holes = burned or not burned (1 or 0). E.g. = CDs/DVDs/Blu-ray.
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