4916311
Beschreibung
Karteikarten von Mel Hughes , aktualisiert more than 1 year ago
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Erstellt von Mel Hughes
vor mehr als 8 Jahre
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| Frage | Antworten |
| Explain the need for secondary storage | Because RAM is volatile, data must be stored on secondary storage devices so it is not lost when the computer is switched off. |
| What is optical storage? Give examples | Uses light from lasers to read and write data on discs CDs and DVDs |
| What is magnetic storage? | This uses stacks of non- removable discs coated with magnetic materials |
| How does magnetic storage work? | - The disks spin and a read-write head moves across the discs - Electro-magnets in the read-write heads read and write the data |
| List examples | Hard drive and magnetic tape |
| What's solid state storage? | Where data is written and erased electronically so there are no moving parts |
| More info about SSS | - Faster to read/write than magnetic and optical - Writing, erasing and rewriting causes determination - Therefore, solid state storage is not used for critical systems |
| Give examples of solid state storage | Memory cards and USB flash drives |
| List considerations when picking a storage device | -Capacity -Portability -Reliability -Durability -Speed |
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