CD-ROM :-
CD-ROM (Compact Disk Only Memory) employs optical storage technology as against magnetic storage technology used in floppy and hard disks. A CD-ROM disk comes in a standard size of 12 CM. It's maximum storage capacity is 660 minutes. Thus a single disc is equivalent to approximately 400 floppy discs of 1.44 KB capacity or 1500 floppy discs of 360 kb capacity. One CD-ROM can store up to 2,50,000 pages (A4size) of text. It offers numerous features unrivalled by current magnetic media. Thus CD-ROM is capable of storing a vast amount of information and it is very compact, more reliable and durable as compared to magnetic discs. These properties make these CD-ROM ideal for the discribution of computer software, pictures, training materials, data bases,newspaper and encyclopedias. As the next suggests,you can only read data from the CD-ROM. The data is stored on CD in such a way that it can't be erased. Also you can't write anything on CD having some pre-recorded information. This feature makes it more reliable because once data is store on a CD it will be permanent and will get corrupt due to a number of read operation.
Digital video disk (DVD) :
Digital video disk (DVD) is introduced by Philips and Sony is 1995. It is an optical storage device that looks the same as a CD. ADVD has the same dimensions as a standard CD but cannot be read by a CD player, although a DVD player can read standard CDs, DVD can store up to 4.7 gigabyte if data.
Digital video disk (DVD) is similar to a CD but has larger storage capacity and enormous clarity. Depending upon the disk type it can store several gigabytes of data. DVDs are primarily used to store music or movie and can be played back on your television or the computer too. These are not Rewritable.
DVD R:CD recordable, we are able to write until it's capacity is full.
DVD ROM:read only memory. We can not write data in it.
DVD RW:CD Rewritable. We are name as E or Drive.
CD-ROM (Compact Disk Only Memory) employs optical storage technology as against magnetic storage technology used in floppy and hard disks. A CD-ROM disk comes in a standard size of 12 CM. It's maximum storage capacity is 660 minutes. Thus a single disc is equivalent to approximately 400 floppy discs of 1.44 KB capacity or 1500 floppy discs of 360 kb capacity. One CD-ROM can store up to 2,50,000 pages (A4size) of text. It offers numerous features unrivalled by current magnetic media. Thus CD-ROM is capable of storing a vast amount of information and it is very compact, more reliable and durable as compared to magnetic discs. These properties make these CD-ROM ideal for the discribution of computer software, pictures, training materials, data bases,newspaper and encyclopedias. As the next suggests,you can only read data from the CD-ROM. The data is stored on CD in such a way that it can't be erased. Also you can't write anything on CD having some pre-recorded information. This feature makes it more reliable because once data is store on a CD it will be permanent and will get corrupt due to a number of read operation.
Digital video disk (DVD) :
Digital video disk (DVD) is introduced by Philips and Sony is 1995. It is an optical storage device that looks the same as a CD. ADVD has the same dimensions as a standard CD but cannot be read by a CD player, although a DVD player can read standard CDs, DVD can store up to 4.7 gigabyte if data.
Digital video disk (DVD) is similar to a CD but has larger storage capacity and enormous clarity. Depending upon the disk type it can store several gigabytes of data. DVDs are primarily used to store music or movie and can be played back on your television or the computer too. These are not Rewritable.
DVD R:CD recordable, we are able to write until it's capacity is full.
DVD ROM:read only memory. We can not write data in it.
DVD RW:CD Rewritable. We are name as E or Drive.
No comments:
Post a Comment