Difference between Primary storage and secondary storage - operating system

Difference between Primary storage and secondary storage

Primary memory is the main memory (Hard disk, RAM) where the operating system resides.

Secondary memory can be external devices like CD, floppy magnetic discs etc. secondary storage cannot be directly accessed by the CPU and is also external memory storage.

Difference between Primary storage and secondary storage

- Primary memory storages are temporary; where as the secondary storage is permanent.

- Primary memory is expensive and smaller, where as secondary memory is cheaper and larger

- Primary memory storages are faster, where as secondary storages are slower.

- Primary memory storages are connected through data buses to CPU, where as the secondary storages are connect through data cables to CPU
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Discussion Board
Incorrect mention of hard disk.
Hard disk does not come in the primary storage. It is a form of secondary storage.
Diksha 09-10-2016
Primary storage and secondary storage
A hard disk is not classed as primary storage. It does not directly communicate with the CPU and it is also non-volatile. You can turn on and run a computer without the need for a hard drive.
sebastian 05-16-2016