Secondary storage
- Created by: Tomiwaq
- Created on: 25-03-19 19:28
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- Secondary storage
- Two storage types
- Primary storage
- Memory areas that the CPU can access
- Cache
- ROM
- RAM
- Volatile
- Fastest read / write
- Memory areas that the CPU can access
- Secondary storage
- Where all data are stored when not in use
- Magnetic hard disk drives
- Solid state drives
- CD's
- SD cards
- Read / write speeds are much slower
- Where all data are stored when not in use
- Primary storage
- Hard disk drives
- Traditional internal storage devices in PCs and laptops
- Made up of a stack of magnetic metal disks
- Data is stored magnetically in sectors within circular tracks.
- Portable HDDs are popular for backing up and transporting large amounts of data
- HDDs are very long lasting and reliable
- Can be broken by large impacts
- Make noise due to moving parts
- Solid state drives
- Contain no moving parts
- Most use flash memory
- Faster read / write than HDD
- Quicker boot up and opening files
- Portable SSDs can be used to back up and transport data
- Silent because of no moving parts
- More shockproof than HDDs
- Optical drives
- CDs
- DVDs
- Blu-ray
- Read-only
- CD-ROM
- DVD-ROM
- BD-ROM
- Write-once
- CD-R
- DVD-R
- BD-R
- rewritable
- CD-RW
- DVD-RW
- BD-RW
- They are very cheap
- They are portable
- Waterproof and shockproof
- Magnetic tapes
- Greater storage capacity
- Low cost
- Used in archive libraries to store large amounts of data
- Comes in plastic cassettes
- Slow to find specific data
- Two storage types
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