What is digital versatile disk read only memory, Computer Engineering

Assignment Help:

DVD-ROM employs same principle as a CD-ROM for reading and writing. However a smaller wavelength laser beam is used. Total capacity of DVD-ROM is 8.5GB. In double-sided DVD-ROM two these disks are stuck back to back that allows recording on both sides. This requires disk to be reversed to read reverse side. With both side recording and with each side storing 8.5GB total capacity is 17GB. 

In both DVD-ROMs and CD-ROMs the density of data stored is constant throughout spiral track. In order to attain a constant readout rate the disk should rotate faster near centre and slower at outer tracks to maintain a constant linear velocity (CLV) between head and CD-ROM/DVD-ROM platter. So CLV disks are rotated at variable speed. Compare it with mechanism of constant angular velocity (CAV) in which disk is rotated at a constant speed.  So in CAV the density of information storage on outside sectors is low.


Related Discussions:- What is digital versatile disk read only memory

Explain proces of defining the document page title, Q. Explain proces of de...

Q. Explain proces of defining the Document Page Title? Though the document has a file name, notice it's still labelled Untitled Document; that is because it needs an HTML docum

Static or dynamic - artificial intelligence, Static or Dynamic - artificial...

Static or Dynamic - artificial intelligence An environment is static if it doesn't change while an agent's program is making the decision about how to act. When programming ag

Principle of locality, Principle of locality: Temporal  base locali...

Principle of locality: Temporal  base locality (locality in time):- If an item is referenced then it will tend to be referenced again soon. Spatial locality (local

Explain about distributed systems, Q. Explain about distributed systems? ...

Q. Explain about distributed systems? A Distributed System in that Data, Process and Interface component of information System are distributed to many locations in a computer n

Explain about server synchronization, Q. Explain about Server synchronizati...

Q. Explain about Server synchronization? Server synchronization: It updates atom by server process of requesting process. In this method an atom acts as a unique update server.

What is a size category, What is a Size Category? The Size category ve...

What is a Size Category? The Size category verifies the probable space needs of the table in the database.

What are digital signatures and its uses, What are Digital Signatures and i...

What are Digital Signatures and its uses? A digital signature is an electronic quite than a written signature which can be used through someone to authenticate the identity of

Basics of caches - computer architecture, Basics of Caches: "The cache...

Basics of Caches: "The caches are situated on basis of blocks, the shortest amount of data which may be copied between 2 adjacent levels at a time. "If requested data by th

Introduction to the operating system, Q. Introduction to the Operating Syst...

Q. Introduction to the Operating System? An Operating system is software that creates a relation between the User, Hardware and Software. It is an interface between the all.

Representation in prolog - logic programs, Representation in Prolog - Logic...

Representation in Prolog - Logic Programs: If we justimpose some additional constraints on first-order logic, so than we get to a representation language knowing as logic prog

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd