LIFE ‘S OF SECONDARY STORAGE

Secondary storage had been used by computer users for along time ago. From time to time, there are different trend in using secondary storage. For example, Floppy Disk once is most common storage to be used by the users but now we can see now floppy disk is very rarely used and many new computers even did not provide floppy disk reader!!.  Down here we list out the evolution of storage that are commonly used by individuals to store data.

HARD DISK

Hard Disk is secondary storage that has in all computers.Its used rigid metallic platters that are stack on top of another, Hard disk store and organize files using tracks, sectors and cylinders.

Tracks – rings of concentric circles without visible grooves and divided into sectors.

Cylinder – runs through each track of a stack of platters to differentiate files stored on the same track and sector of different platters.

Very commonly used hard disk that been located inside system units is called internal hard disk and external hard-disk are portable and can be bring anywhere.in recent technology capacity hardisk storage has been developed to terabyte.

FLOPPY DISK

Floppy Disk use flexible flat circular pieces of Mylar plastic that have been coated with a magnetic material.Floppy Disk drives store data and programs by electromagnetic surface and files are organized and stored according to tracks and sectors.In  90’s floppy disk are widely used in company and university students.

Why floppy disk are very rarely used now???.... because it has so many limitations. One of it main limitations is its storage capacity. For example in 90’s students need to send two or three disk for a work because it storage capacity. ( If there are 200 students send their works, lectures room will be full of it) .

OPTICAL DISK

Optical disk  is very popular to be used by the users until now.It in optical-disc technology, a laser beam alters the surface of plastic or metallic disk to represent data.The disc is read by an optical disc drive using a laser that projects tiny beam of light on these area and reflected lights determine wheter the area represents a 1 or a 0. We can divided Optical Disk into three type that is Read only CD-ROM means cannot be written or beerased by users. Write once CD-R can be written once by the users but the data cannot be erased and lastly Rewritable CD-RW the disc surface not permanently altered when data is recorded.

Until now optical disc is continously used as the secondary storage and it has face certain evolution. Its improving for their capacity. First compact disc can only stored from 650MB to 1 GB then DVD discs can stored  4.7 GB to 17 GB on a single disc and now isBlu-Ray Disc that used blue-colored laser to read the disc that can reach until 50 GB.

For now Blu–Ray being used in high technology including in PS3!!... But in Malaysia the Blue-Ray Disk are not commercially used by the users and they still prefer to used CD or DVD because they want to avoid cost of upgrading their driver that can read blue-ray disk

 ONLINE STORAGE SERVICE

Nowadays internet are widely used around the world. In certain country almost at every places we can surf the internet.Plus, wireless technology put customer more on using the internet.Futhermore other secondory storage prone to failure and leading to data loss.There come asolution that is online storage services that allowed user stored their data in the internet and can acess their data when they want to do it.For big companies they pick specialized internet storage provider to backup their file and this still small amount individual users using this type of secondary storage.

Although in foreign company they are using this kind of storage but in Malaysia it still not the first choice for users. Only big company are using this but for individuals they prefer to use their own storage because of their mindset that said things from internet are not safe and can easily be hacked.Although like that it doesn’t mean that this storage is not develop in our country.For example they is a local company that provide internet storage that is afteroffice. The question is how long will it takes for this technology to be used widely like the used of USB flash drive?? For our group  it depends on the way government choose their way to provide which level of internet technology to be used by the citizens because government has power to control communication and technology to be brought to our country.Hopefully it is going better and better.