Storage Devices

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# Storage Devices - PowerPoint PPT Presentation

Storage Devices. Magnetic devices. Optical Devices. Solid State Devices. Amazon warehouse. Wal -mart warehouse. Small Press Warehouse. Performance related specs. Access Speed or Access Time Capacity Life-time Price per byte. Poster Activity. Store, to store and storage.

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## PowerPoint Slideshow about 'Storage Devices' - wilma-mathis

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Presentation Transcript

### Storage Devices

Performance related specs.
• Access Speed or Access Time
• Capacity
• Life-time
• Price per byte
Store, to store and storage
• I have stored my pictures in a CD.
• I have to go to the store.
• Your storage device isn’t working, so you need to get a new one.
• Store can be a noun.
• Store can be a verb, to store.
Byte? Bit?
• 1 Byte = 8 bits
• 1 Byte = 10101010
• We use byte to represent characters.
• So, if one byte is character A, then the computer would see it like the following 8 bits 01 00 00 01.
Bytes, KB, MB, GB and so on...
• Bytes
• 1 Kilobyte = 1000 Bytes
• 1 Megabyte = 1,000 KBs
• 1 Gigabyte = 1,000 MBs
• 1 Terabyte = 1,000 GBs
• 1 Petabyte = 1,000 TBs
• 1 Exabyte = 1,000 PBs
• 1 Zettabyte = 1,000 EBs
• 1 Yottabyte = 1,000 ZBs
How do we measure capacity?
• One word: Capacity.
• With 160GB of storage and up to 36 hours of music playback,2 iPod classic lets you enjoy up to 40,000 songs or 200 hours of video wherever you go.1

Eachsongaverageweights 4 MB or 0.004GB

1 Actual capacity varies by content.

Global data storage calculated at 295 EBs
• Mankind's capacity to store the colossal amount of information in the world has been measured by scientists.
• The study, published in the journal Science, calculates the amount of data stored in the world by 2007 as 295 exabytes.
• http://www.bbc.co.uk/news/technology-12419672
Digital content universe to be over 1 Zettabyte in 2010
• The total amount of data stored in the world’s computers, will surpass a zettabyte.
• In just ten years’ time, the Digital Universe will grow by a factor of 44 to reach 35 zettabytes in 2020.