Flashcards
Secondary Storage
Cards in this deck (32)
- 1how many tiers are there to secondary storage?3
- 2what are the 3 tiers to secondary storage?primary storage, secondary storage, tertiary storage
- 3what is the primary storage layer of secondary storage?the memory areas that the CPU can access very quickly.
- 4what is the secondary storage layer of secondary storage?where all of the data is stored when not in use.
- 5Give an example of data that is stored in the secondary storage layer.magnetic hard disk drives, SSDs, CDs, SD cards etc
- 6Give an example of things stored on secondary storage, primary storage layerCPU, registers, RAM and ROM.
- 7what is the tertiary storage of the secondary storage tiers?used for storing data long term, such as back ups.
- 8give an example of something found on the tertiary tier of secondary storagemagnetic tape libraries, filled with backups.
- 9what are hard disk drives?traditional internal storage inside PCs and laptops
- 10what is a hard disk drive made up of?magnetised metal disks spinning at 5400-150000 rpm.
- 11how is data stored in a HDD?stored magnetically in small areas called sectors within circular tracks. Read/write heads on a moving arm are used to access sectors on the disks.
- 12what are portable HDDs popular for?backing up and transporting large amounts of data.
- 13What kind of memory do SSDs use?flash memory
- 14do solid state drives have moving parts?No
- 15Describe the speed of SSDs in comparison to HDDsSSDs have faster read/write speeds than HDDs.
- 16What is a hybrid drive?SSD is used for storing the OS and programs, and a HDDs are used for data storage.
- 17what do portable SSDs do?transfer large amounts of data and backing up
- 18what are some types of flash storage?USBs & memory cards (SD cards)
- 19What are advantages of HDDs?cheap
higher capacity than SSDs
longer read/write life than an SSD - 20what are advantages of SSDs?Faster
Don't need defragmentation
more shock proof
silent (HDDs make noise) - 21Give an example of an optical discCDs, DVDs and BlueRay discs.
- 22How much can a CD hold?700mb of data
- 23How much can a DVD hold?4.7GB of data
- 24How much can a blue ray disc hold?25GB
- 25What are the three forms of optical discs?read only
write once
rewritable - 26Give an example of read only optical discsCD-ROM, DVD-ROM, BD-ROM
- 27Give an example of a write once optical discCD-W, DVD-R, BD-R
- 28Give an example of a rewritable optical discCD-RW, DVD-RW, BD-RW
- 29Optical disc use is declining because...streaming and downloading is quicker online now, devices such as phones don't have optical drives, DVD-Rs and DVD-RWs are not as fast as flash memory
- 30what is a modern advantage to optical discs?they are very cheap, portable and won't be damaged by water or shocks (but are easily scratched)
- 31What are benefits to magnetic tape?it has a much larger capacity than HDDs and a low cost.
- 32What is magnetic tape usually used for?storing huge amounts of data, such as backups
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- GCSE Computer Science (Computer Systems) Flashcards on Secondary Storage, created by Katie S on 05/05/2017.
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- Katie S
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