An HDD in a nonremovable form of computer data
storage. Measured in bits (and subsequently bytes, kilobytes, etc.), it uses
magnetism and the binary system to store most of the things that makes your
computer work, and your personal files.
It consists of at least one platter, which is a
single disk that is rotated around a spindle and read by a head. The speed that
the platter can be accessed with is measured in RPM, though a higher RPM is
needed as the capacity of the HDD becomes greater.
After a set period of inactivity, the HDD spins
down, which means the platters stop rotating to save energy. The drawback is
the neccesity to spin back up when you use the HDD again, which takes a few
seconds. When the HDD spins down, the head, which is attached to an arm moves
from its reading position from over the platter to its resting position which
is not over the platter. This is much safer for your HDD, because when you move
your computer, or the HDD itself, the arm will not be shaken and damage part of
the platter.
Most of the HDD is stored within an air-tight
area. This is to prevent dust and any other small particles from entering the
main area and ruining the (very sensitive) platters. If the HDD is cracked
open, or forcibly opened, it is pretty much guaranteed that the HDD will not
work next time that it is used.
A good few years ago now, I wrote
the first Click article to focus on USB Flash Drives and in it I rather
optimistically sounded the death knell of the floppy disc which at the time was
still very popular. Of course, I also thought the end was in sight when we were
introduced to the rewritable CD, the Zip
Drive and the 120Mb Floppy, but let's not dwell on
these points too much. The important thing to remember is that this time my
prediction was accurate and this is down, in no small part ,to the remarkable
success of the USB Flash Drive.
Computer sound cards are actually computer
expansion cards that can input and output sound under control of specific
computer programs. Typical uses of computer sound cards include providing the
audio component for multimedia applications such as music composition, editing
video or audio, presentation/education, and entertainment (games). Many
computers have built in sound capabilities, while others require these
expansion cards if audio capability is desired.
For years I have been perplexed by the people that
use their mouse for absolutely everything when are a number of perfectly good
keyboard shortcuts that will do the job in a fraction of the time and I believe
the reason people do this is that they just don't know there is another way.
Why hunt around for an item on a menu bar if you can quickly hit a key and
achieve the same effect?
+ نوشته شده در جمعه 1387/09/08ساعت 13:8 توسط majid
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اين وبلاگ در جهت آموزش شما كاربران در زمينه رايانه و اينترنت و همچنين در اختيار دادن نرم افزار هاي كاربردي راه اندازي گرديده است اميد است كه اين وبلاگ براي شما عزيزان مفيد واقع گرد.
