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. Hosting companies operate large data centers, and people who require their data to be hosted buy or lease storage capacity from them. The data center operators, in the background, virtualize the resources according to the requirements of the customer and expose them as storage pools, which the customers can themselves use to store files or data objects. Physically, the resource may span across multiple servers and multiple locations. The safety of the files depends upon the hosting companies, and on the applications that leverage the cloud storage.
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Part 2
1.- The surface is divided into micro sized areas known as magnetic domains. Every magnetic domain has a magnetic dipole which has their own field.
- In a hard disk information / data is written on the rotating platters by the read and write heads.
- The write heads read/write by magnetizing the area. It generates a strong magnetic field for this purpose.
- 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.
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