Partitioning and Formatting

Partitioning:
Disk Partitioning is the process of logically dividing the storage space of a Hard disk into deparate areas commonly called as partitions or drives

• Primary
• Extened

Creating more than one partition has the following advantages:

• Separation of the operating system (OS) and program files from user files. This allows image backups (or clones) to be made of only the operating system and installed software.
• Having an area for operating system virtual memory swapping/paging.
• Keeping frequently used programs and data near each other.
• Having cache and log files separate from other files. These can change size dynamically and rapidly, potentially making a file system full.
• Use of multi-boot setups, which allow users to have more than one operating system on a single computer. For example, one could install Linux, BSD, Mac OS X, Microsoft Windows or other operating systems on different partitions of the same hard disk and have a choice of booting into any compatible operating system at power-up.
• Protecting or isolating files, to make it easier to recover a corrupted file system or operating system installation. If one partition is corrupted, none of the other file systems are affected, and the drive's data may still be salvageable. Having a separate partition for read-only data also reduces the chances of the file system on this partition becoming corrupted

Formatting:

• Formatting is the process of creating file system on the partition
• A file system tells how the files and folders to be created are stored and retrived
  

CD ROM /DVD ROM

CD/DVD Surface

• In CD or DVD data is stored in the form of lands and pits
• land can reflect laser beam and pit will absorb the laser beam
• While reading data if the light emitted by laser is reflected then it is treated as binary '1' and if laser beam is not reflected then it is treated as binary '0'

The Parts of CD ROM/DVD

• Audio Connectors
• Jumper Pins and Jumper
• IDE Ribbon
  
• cable connector
• Power Cable
  

CD (Compact Disk)

• I create ISO files of every computer CD and DVD that comes across my desk. Driver discs and software discs alike are stored on my desktop PC’s large hard disk. Whenever I need to reinstall software, or simply reinstall a driver, it is easier for me to find the correct ISO file than it would be to find a physical disc.

• ISO files are even more useful when combined with an ISO mounting utility like Virtual CloneDrive. Virtual CloneDrive allows you to mount an ISO image file as if it were inserted into a virtual DVD drive. Virtual CloneDrive can mount ISO image files of either CD or DVD discs.

DVD Disk
We upgrade different kinds of CD/DVD ROM (Also known as Compact disk /Double Video Disk Read Only Memory)