Memory(Secondary storage)


Example of secondary storage:

Image result for hard disk driveHard disk drive(HDD): This is a type of secondary storage that is mechanical. some example of the mechanical parts in a hard disk drive is the platter which is a rotating disk that contains the data and a arm which read the data off the platter. But due to his design the HDD over time can be come much slower than alternatives such a Solid State Drive(SDD). This is because over time part of file can get spread across the disk(fragmentation), This will make it so that over time it will take longer to get all the data need off the disk to run a process. You can improve this by running a disk fragmentation software that moves data on the disk that is related to each closer together for quicker access. But advantage over an SSD that a HDD has is that it's cheaper per Gb. So if you require large amount of storage you would probably be better off purchasing a HDD.

Image result for SSDSolid state drive(SSD): This type of secondary storage uses flash memory. As a result SDD don't have any moving parts(hence why they are call "solid state" drives), as a result it more robust than a HDD and therefore less likely to break so it more suited to be used in portable devices than a HDD. Also data stored on a SSD is stored on chips which allows the fast access to data when compared a HDD. Another reason that a SSD would be faster than a HDD is because unlike in a HDD disk fragmentation doesn't occur in a SSD mean the speed of the drive wont slow down as move data is added and removed from the drive.

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