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today we're gonna talk
about hard drives
both desktop and laptop hard drives hard
simply put is work all if your data is stored
now this is different from memory if someone asked how much memory you have
talking about RAM a random access memory
which is a different component that will cover in another video
there are several different types of hard drives out there
but the first we're gonna look at is the ID
this I D Drive which stands for
integrated drive electronics legacy that has pens for the ID cable
in for the ID power as well I D E is older technology
which is reflected in axis peace there's also a jumper
which is a little plastic piece that allows for cable select
are deciding they will be a slave our master
for cable select work and I D Drive must have missed jumper set
CS and the using a cable that supports it
for jumper settings you can look at the label
and to chase a jumper it's as simple as pulling it off
placing it on the appropriate pins say two stands for
serial advanced technology attachment
say there is a newer technology is much faster than the older
ID drives the say to drive doesn't have pins like the ides
there's a say to power connection an essay to data connection there is a spot
for a jumper
which typically won't see that gonna say to drive the standard size for both
types of hard drives
is about six inches by 4 inches which
for obvious reasons not fit into a laptop
these are made for desktops only in with the desktop you're able to put multiple
drives within the computer
for multiple hard drives for both I D E and say to
you need a cable for each drive that connects to the motherboard
as well as a power cable freeze-dried the power cable comes from the power
supply
in the data connects to the board
on a board that has say the connections you can put up to six drives you have
space available
and now an even newer technology
is a solid state drive
these are even faster than the Seder drives but they cost a lot more too
which leads to say the driver still the most commonly used
and as far as the ID you'll find too many those anymore
now laptop hard drives are very similar
but there are a few differences besides the obvious contrast
size
for the ID knows there's only one strip of pens
but and there isn't a power cable rather than using cables
the drive a plug directly into the ID port which is built into the motherboard
supplying both power and data and on some laptop drives there will be a small
plastic tab
to help pull it out taking a look at say two drives for a laptop
you can see that the connections are the exact same as for the desktop
this makes a universal and the sense that
you can now laptop drive in a desktop computer
if you have the proper amount the label tells us
all the important information about the drive and something's not all of us
really need to know
some of the important information included
is the manufacturer jumper information
the speed and the storage capacity
what's on this when we can see is a 160 gigabytes
storage capacity is simply the amount of data you drive can hold
hard drives can have a wide range of sizes
but typically these days and the hundreds of gigabytes
sometimes even into the terabytes with external hard drives
are mass storage devices the speed of a hard drive is measured by rpm
this drive here is rated at 7200 rpm
this means that the disk spins around
7,000 two hundred times in one minute
or 120 times per second
to give you a better idea of how fast that really is so the faster the discs p
the faster it is able to access data for example
if you need to access a document which is stored here
the faster it spins means the faster overreached are
in the red
listed with the speed is usually a cash the cash is a small amount of memory and
the drive circuitry
in a sort of a buffer between the drive
and the rest of the computer
now we've covered the basics let's take a closer look inside of one now
and check out what parts make up the hard drive the first component to look
at will be the controller card a lot of times
ever drive is not working a simple troubleshooting step
is to replace the card with an identical one from another good drive
if you have one available often this can be a simple fix to a hard drive problem
here we have a hard drive
with the controller card already taken off the back to open up the hard drive
you need to remove all the torch Kors and there's usually a screw
hidden under the label as well now that we're inside
this is the control arm which reads the drive by scanning back and forth
this is somewhat similar to how record player works except that reads from the
inside out
things such as our operating system
and other programs that come installed on the computer will be closer to the
center
and then it will work its way out things at it later
such as documents are other programs will be stored further out on this
the disc is also known as a flatter
and are typically made of non-magnetic materials
have an extremely thin coating paramagnetic material on top
now we won't get into details in this video
but the platter is separated into tracks
and sectors tracks are concentric circles
and sectors or wedge-shaped this helps with the organization and filing at the
data
data is stored in these magnetic fields
in a digital format as ones and zeros now before we finish
here's just a quick example how this works if you want to watch a video file
on your computer
you click your mouse on the file a signal is then processed to the
controller card
it within milliseconds it tells the arm
where that file is located on your hard drive once located
the data is sent back to the army which leads to the controller card
and back to the system board to be displayed
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