Illustrate about compact disk rewritable, Computer Engineering

Assignment Help:

Q. Illustrate about Compact Disk Rewritable?

CD-RW optical disk can be repeatedly written and overwritten same as with a magnetic disk. Even though a number of techniques have been tried but only pure optical approach which has proved attractive is known as phase change. Phase change disk uses a material which has two considerably different reflectivities in two different phase states. There is an amorphous state in that molecules display a random orientation and that reflects light poorly and a crystalline state that has a smooth surface which reflects light well. A beam of laser light can alter the material from one phase to other.  Primary shortcoming of phase change optical disks is that material ultimately and permanently loses its desirable properties. Current materials are able to be used for between 500000 and 1000000 erase cycles.

CDRW has obvious benefit over CD-ROM and CD-R that it is able to be rewritten and so used as a true secondary storage.  As it competes with magnetic disk. A key benefit of optical disk is that engineering tolerances for optical disks are much less severe than for high-capacity magnetic disks. So they exhibit higher reliability and longer life.


Related Discussions:- Illustrate about compact disk rewritable

Develop the multi agent system, The new season of AFL, and the excited comi...

The new season of AFL, and the excited coming FIFA World Cup in South Africa this June, many sports fans are willing to find the latest results of their beloved sports teams. In th

What are the different kinds of lock modes, What are the different kinds of...

What are the different kinds of lock modes? There are three types of lock modes:- Shared lock Exclusive lock. Extended exclusive list.

C program , minimum number of shelves

minimum number of shelves

Explain vector processing issues in pipelining, Vector Processing   A...

Vector Processing   A vector is an ordered set of similar type of scalar data items. The scalar tem may be a logical value, an integer or a floating point number. Vector proce

What are the external storage systems, External storage systems A numb...

External storage systems A number of different types of external memory devices are available now. Some of these are considered below (hard drives haven't been mentioned as th

Nmknl''knl, Ask question bhjjnjnnjnjm#Minimum 100 words accepted#

Ask question bhjjnjnnjnjm#Minimum 100 words accepted#

Explain the role of a bus arbiter in a multiprocessor, Explain the role of ...

Explain the role of a bus arbiter in a multiprocessor configuration. Bus arbiter: Which functions to resolve priority between bus masters and allows only one device at a time t

Develop a system to store change logs, The ?rst task in the project is to d...

The ?rst task in the project is to develop a sane system to store change logs and versions of ?les. The simplest approach is to create a "dot" directory in the location of the ?le

Describe the advantages of java servlets over cgi interface, Describe the a...

Describe the advantages of JAVA servlets over CGI interface. The Advantage of Servlets Over "Tradi tional" CGI: Java servlets are extra efficient, easier to utilize more pow

Show various RISC processors, Q. Show Various RISC Processors? RISC has...

Q. Show Various RISC Processors? RISC has fewer design bugs and its simple instructions decrease design time. Sodue to all the above important reasons RISC processors have beco

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