Tutorial 3(B) – 24th SEPT. 2013

1)Cloud storage is a model of networked enterprise storage where data is stored in virtualized pools of storage which are generally hosted by third parties

2)

You can upload photos or files to the DropBox.

You can share your files and photos with your friends.

 Part 2

1)In a hard disk information / data is written on the  platters by the read and write heads.The heads are not in actual contact with the disk they are actually slightly above the magnetic surface of the platter.The heads detects the magnetization of the platter right below them. The actuator arm aids the heads in covering the platter area.The surface is divided into micro sized areas known as magnetic domains. Every magnetic domain has a magnetic dipole which has their own field.The write heads read/write by magnetizing the area. It generates a strong magnetic field for this purpose.