Unit I : Evaluation of Computer System
Computers have become a vital part of our life. This Chapter introduces you to the computer and the way computer works. Different parts of the computer and how they work is also covered in this chapter.
Unit II : Hard Disk Drive
Unit III : Optical Media
Unit IV : Processor
Unit V : Hardware & Networking
Magneto-Optical (MO) is a technology that is used to read and write CDs. You need a Magneto-Optical drive to read and write data on a Magneto-Optical CD. The working of the Magneto Optical drive is based on a laser beam, which writes data on the surface of the CD. Magneto-Optical drives are ideal for offices, organizations or business units to keep a large volume of data backups.
Developed by Blu-ray Disk Association (BDA), Blu-ray (also known as Blu-ray or BD) is an optical storage medium that records, stores and plays high-defination videos and digital audio. Blu-ray uses a blue-violet laser, instead of a red laser that is used by current optical disk technologies, such as DVD,DVD±R, DVD±RW and DVD-RAM to read and write data. Blu-ray can store about 25 GB of data on its single-layer disk and up to 50 GB data on the dual-layer disk. In addition it has a higher data transfer rate of 36 Mbps. Moreover you can have 9 hours of HD Video on a Blue-ray disc or about 23 hours od Standard Definition (SD) on a 50 GB disk.
Similar to CD and DVD technologies, Blu-ray also uses different technologies : BD-R and BD-RW.
A combo drive supports the functionality of both a CD-ROM drive and a DVD-ROM drive. In other words, a Combo drive can be used to read and write CDs and DVDs. A combo drive reads CDs at a maximum speed of 52x and DVDs at a maximum speed of 16x. Moreover it writes CD-R disks with a maximum speed of 52x and CD-RWs with maximum speed of 32x.