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Do You know Types of Secondry Memory Devices?

This kind of memory is otherwise called outside memory or non-unpredictable. It is slower than principle memory. These are utilized for putting away information/Information for all time. CPU legitimately doesn't get to these recollections rather they are gotten to by means of information yield schedules. The substance of optional recollections are first moved to fundamental memory, and afterward, CPU can get to it.


Secondary memories are very sensitive types of computer hardware, and Right now memory the expense per bit of capacity is low. Notwithstanding, the working velocity is slower than that of the essential stockpiling. The enormous volumes of information are put away here on lasting premises and moved to the essential stockpiling as and when required.



There are mainly four types of secondary memory are:

1. Magnetic Disk

2. Floppy Disk

3. Hard Disk

4. Optical Disks


Magnetic Disk - Disk The Magnetic Disk is Flat, round platter with a metallic covering that is pivoted underneath reading/compose heads. It is a Random access gadget; read/compose head can be moved to any area on the platter


Floppy Disk - These are little removable circles that are plastic covered with attractive account material. Floppy circles are commonly 3.5″ in size (breadth) and can hold 1.44 MB of information. This convenient stockpiling gadget is a rewritable media and can be reused on various occasions. Floppy circles are regularly used to move records between various PCs. The primary inconvenience of floppy circles is that they can be harmed effectively and, in this way, are not entirely dependable. The accompanying figure shows a case of the floppy plate. Figure 3 shows an image of the floppy plate.


Hard Disk - Another type of assistant stockpiling is a hard plate. A hard circle comprises of at least one inflexible metal plates covered with a metal oxide material that permits information to be attractively recorded on the outside of the platters. The hard circle platters turn at 5 a high pace, regularly 5400 to 7200 cycles for every moment (RPM). Storage limits of hard plates for PCs go from 10 GB to 120 GB (one billion bytes are known as a gigabyte).


Optical Disks - Optical Mass Storage Devices Store bit esteems as varieties in light reflection. They have higher zone thickness and longer information life than attractive stockpiling. They are additionally Standardized and moderately economical. Their Uses: read-just stockpiling with low execution prerequisites, applications with high limit necessities and where conveyability in an institutionalized arrangement is required.

Kinds of Optical Disk

1. CD-ROM (read only)
2. CD-R: (record) to a CD
3. CD-RW: can write and erase CD to reuse it (re-writable)
4. DVD(Digital Video Disk)