AQA A Level Secondary Storage Devices

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Move the correct keywords to fill the gaps

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Liz Swallow

United Kingdom

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Compléter AQA A Level Secondary Storage DevicesVersion en ligne Move the correct keywords to fill the gaps par Liz Swallow 1 memory such as RAM is volatile and loses data when is turned off . Secondary storage is non - , so it keeps data when the computer is down . Secondary storage provides much capacity than memory . It allows - term storage of , files and the system . It is typically per GB than . 2 ? the time taken for the / head to move to the track . ( latency ) ? the time taken for the disk to rotate until the is under the . ? the time taken to actually or the data once the is located . 3 recording stores magnetic bits horizontally along the disk surface . recording stores bits vertically ( upright ) on the disk surface . alignment allows bits to be packed closer together . This increases data and overall capacity . 4 Hard disks contain spinning coated with magnetic material . The surface of each platter is divided into tracks . are divided into where data is . A read / write head moves across the disk . Data is stored using magnetic of . Changes in magnetic polarity represent ( 1s and 0s ) . As the disk , the sector moves under the / head where is read or written . 5 A high - power burns into the disk surface during manufacture or recording . The areas between are called lands . A low - power reads the disk . Differences in reflected between and lands represent data . A between and land is interpreted as a binary . 6 They use different laser . wavelength lasers can create smaller pits . Smaller pits allow to be packed together . This increases the of the track and capacity . 7 SSDs use flash memory . Each cell contains a - gate transistor . are trapped in the floating gate to store charge . The or absence of charge represents data ( 0 or 1 ) . The charge is without ( non - volatile ) . 8 Flash memory is organised into pages and . Data can be written to . However , blocks must be before they can be rewritten . Individual cannot be directly . To modify data , the entire is copied to , updated , and written to a new .

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AQA A Level Secondary Storage DevicesVersion en ligne

Move the correct keywords to fill the gaps

memory such as RAM is volatile and loses data when is turned off .
Secondary storage is non - , so it keeps data when the computer is down .
Secondary storage provides much capacity than memory .
It allows - term storage of , files and the system .
It is typically per GB than .

? the time taken for the / head to move to the track .
( latency ) ? the time taken for the disk to rotate until the is under the .
? the time taken to actually or the data once the is located .

recording stores magnetic bits horizontally along the disk surface .
recording stores bits vertically ( upright ) on the disk surface .
alignment allows bits to be packed closer together .
This increases data and overall capacity .

Hard disks contain spinning coated with magnetic material .
The surface of each platter is divided into tracks .
are divided into where data is .
A read / write head moves across the disk .
Data is stored using magnetic of .
Changes in magnetic polarity represent ( 1s and 0s ) .
As the disk , the sector moves under the / head where is read or written .

A high - power burns into the disk surface during manufacture or recording .
The areas between are called lands .
A low - power reads the disk .
Differences in reflected between and lands represent data .
A between and land is interpreted as a binary .

They use different laser .
wavelength lasers can create smaller pits .
Smaller pits allow to be packed together .
This increases the of the track and capacity .

SSDs use flash memory .
Each cell contains a - gate transistor .
are trapped in the floating gate to store charge .
The or absence of charge represents data ( 0 or 1 ) .
The charge is without ( non - volatile ) .

Flash memory is organised into pages and .
Data can be written to .
However , blocks must be before they can be rewritten .
Individual cannot be directly .
To modify data , the entire is copied to , updated , and written to a new .

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AQA A Level Secondary Storage Devices

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AQA A Level Secondary Storage DevicesVersion en ligne

par Liz Swallow

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