Magnetic storage media and devices store data in the form of ting magnetic dots,the dots are created, read and erased using magnetic fields created by very ting electromagnets
examples:
- hard disk drive
- portable hard disk drive
- magnetic tapes
examples:
- hard disk drive
- portable hard disk drive
- magnetic tapes
SOLID STATE STORAGE
The term 'solid-state' essentially means 'no moving parts' (no reels of tape, no spinning discs, no laser beams).
The data stored on solid state backing storage is rewritable
It includes:
- memory sticks
- flash memory cards
The term 'solid-state' essentially means 'no moving parts' (no reels of tape, no spinning discs, no laser beams).
The data stored on solid state backing storage is rewritable
It includes:
- memory sticks
- flash memory cards
BACKUPS
A back up is a copy of a file.
It is stored on a alternative medium to the original.
- Data could be corrupted on the original medium.
- Data could be accidentally or maliciously deleted/amended from the original medium
A back up is a copy of a file.
It is stored on a alternative medium to the original.
- Data could be corrupted on the original medium.
- Data could be accidentally or maliciously deleted/amended from the original medium
STORAGE METHODS
- So far we've learnt about PLACES where data can be stored, but not HOW.
The two main methods are:
- Sequential
- Random Access
ADVANTAGES: Stores large amount of data, Cheaper
DISADVANTAGES: Takes a long time to get to data
- So far we've learnt about PLACES where data can be stored, but not HOW.
The two main methods are:
- Sequential
- Random Access
ADVANTAGES: Stores large amount of data, Cheaper
DISADVANTAGES: Takes a long time to get to data
Random/Direct Access
Instead of waiting and going through data, you can directly get to your data immediately
ADVANTAGES:
Instead of waiting and going through data, you can directly get to your data immediately
ADVANTAGES: