Explain two problems associated with the computer hard disk.
Problems of computer hard disk
Give three reasons why primary storage devices are not used for secondary storage.
State the purpose of each of the following memories in a computer system. RAM and Hard disk
Holds data that is urgently need by the processor,
Random-access memory is a form of computer memory that can be read and changed in any order, typically used to store working data and machine code.
(b) Hard disk
Used to hold large volumes of data that is not urgently required by the processor — also for back up of OS and data.
Give two reasons why optical disks are better storage media compared to floppy diskettes (2mks)
(a) List five precautions that can be taken to protect data stored in diskettes (5mks)
The diagram below shows a formatted plate surface of a storage disk.
Shade and label:
a) one sector
b) One block
Name three types of optical disks.
Compare the two types of diskettes used in microcomputers in terms of physical size and densities.
Differentiate between primary memory and secondary memory
Primary memory holds data and instructions currently in use. Also stores immediate results from processing waiting transfer to the output devices.
Primary memory is volatile, i.e. contents held are lost on power loss.
Secondary memory or backing storage refers to the storage of programs and data files, not currently being operated on.
Secondary memory is non-volatile or permanent, i.e. Contents held are not lost on power loss.
Clear differences between primary memory and secondary memory
Types of Storage Devices Used By a Computer Giving an Example of Each
There are various categories under which storage devices can be classified;