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Computer Hardware : Mac Optical Drives |
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Apple manufactures various parts of computers. Optical drives are one
of the products, manufactured by apple. Optical disks are a storage
medium of data and optical drives are used to read and write these data
on optical disks.
The optical disc consists of a ferromagnetic material sealed with a
plastic coating. Optical drives have lasers that help to read and write
the data in computer understandable forms. During reading, a laser beam
projected on the disk and it reflects lights. The reflected light
varies due to the magneto-optical Kerr effect.
During writing on the disk, the light becomes stronger so it can burn
the disk in a single spot. This allows an electromagnet positioned on
the opposite side of the disc to change the local magnetic polarization
and data writes on disks.
There are various types of optical drives. These optical drives are:
CD-ROM:-CD-ROM stands for compact disk read only memory used to read
data from disks. These drives enable to read data from audio cds, video
cds and also mp3s. These drives read the data which already
written/encoded on the disks. The data read on the disks are read by
many times.
CD-RW: - CD-RW stands for compact disk writer. These drives have used
to write the data on disks and also read the data which has written on
disks. These drives enable to read data many times and also enable to
write data many times depend upon the properties of disk that the
properties of disk shows write once or write many. To write the data on
CD, these drive use laser. Laser burn the data on disks as computer
readable form.
DVD-ROM: - DVD-Rom are read only digital versatile disc drives that
read the high capacity of storage data disks. These disks store the
data minimum 4.7 gigabyte whereas the Cds store the data maximum 800
megabyte. These drives also read the data which already written/encoded
on the disks. The DVD-ROM supports disks with capacities of 4.7GB to
17GB and access rates of 600 KBps to 1.3 MBps. The one specialty of
DVD-ROMs is that these enable to read the data from CD disks also.
DVD-RW: - DVD-RW stands for digital versatile disc writer. These drives
have used to write the data on DVD disks as well as CD disks and also
read the data which has written on disks. These drives enable to read
data many times and also enable to write data many times depend upon
the properties of disk that the properties of disk shows write once or
write many. To write the data on DVD disks, these drive use laser.
Laser burn the data on disks as computer readable form.
Blu-Ray drives: - Blue ray drives are enable to read or write the data
on disks that has the capacity of 50 gigabytes, 25 gigabyte capacity of
each side. These disks are readable and writable on both sides.
DVDs are mainly used for video and not for software distributions. DVD
drives are still backwards compatible with CD formats however. All
optical drives are rated by speed that refers to the maximum speed the
drive operates when compared to the original CD or DVD standards. There
are many speeds of CD writers, which vary through 8x to 52x. A 24x
drive may run up to 24x when writing.
Go to these websites to get the latest updates about your apple and mac parts.
http://www.dvwarehouse.com/
http://www.sellmac.com/
The internet is the best place to buy cheap computer parts. Due to
increase in demand for many parts in many suppliers find it profitable
to sell their products online. The online dealers have their websites,
which offer information on the various types of Mac parts available for
purchase. |
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