Construction and Operation of the Hard Disk

                  Construction and Operation of the Hard Disk

Photograph of a modern SCSI hard disk, with major components annotated.

The logic board is underneath the unit and not visible from this angle.

By. Amit Kumar

To many people, a hard disk is a "black box" of sorts--it is thought of as just a small device that "somehow" stores data. There is nothing wrong with this approach of course, as long as all you care about is that it stores data. If you use your hard disk as more than just a place to "keep stuff", then you want to know more about your hard disk. It is hard to really understand the factors that affect performance, reliability and interfacing without knowing how the drive works internally. Fortunately, most hard disks are basically the same on the inside. While the technology evolves, many of the basics are unchanged from the first PC hard disks in the early 1980s.

In this section we dive into the guts of the hard disk and discover what makes it tick. We look at the various key components, discuss how the hard disk is put together, and explore the various important technologies and how they work together to let you read and write data to the hard disk. My goal is to go beyond the basics, and help you really understand the design decisions and tradeoffs made by hard disk engineers, and the ways that new technologies are being employed to increase capacity and improve performance.

Read more ...

Lock Your Computer Folder Without Any Software

       Lock Your Computer Folder Without Any Software

Now you can protect your sensitive files and folders without using a software base lock. In order to secure your privacy on your pc, u might need to lock certain folders. Although password protecting software do work, it is almost useless to hide private data with these software(because we are always questioned as to what it is that we are hiding with the help of these software). Hidden folders do not work as they can be easily searched with Windows Search. So, we need an alternative way to create hidden password protected folders which 

Follow the easy steps

It�ll only take a couple of steps and you�re done. The default password is �yourpassword�. This is the only thing you�re gonna change in the code.

Copy the below code.

cls

@ECHO OFF

title Folder Locker

if EXIST "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}" goto UNLOCK

if NOT EXIST Locker goto MDCAPRIOFILES

:CONFIRM

echo Are you sure to Lock this folder? (Y/N)

set/p "cho=>"

if %cho%==Y goto LOCK

if %cho%==y goto LOCK

if %cho%==n goto END

if %cho%==N goto END

echo Invalid choice.

goto CONFIRM

:LOCK

ren Locker "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"

attrib +h +s "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"

echo Folder locked

goto End

:UNLOCK

echo Enter password to Unlock Your Secure Folder

set/p "pass=>"

if NOT %pass%== yourpassword goto FAIL

attrib -h -s "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"

ren "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}" Locker

echo Folder Unlocked successfully

goto End

:FAIL

echo Invalid password

goto end

:MDCAPRIOFILES

md Locker

echo Locker created successfully

goto End

:End

Save this file as �locker.bat�.

Now double click on locker.bat.

It will create a folder named Locker with automatic lock. After creation of the folder, place the contents (your files & folders) you want to lock inside the Folder,

Double click locker.bat again. It will ask to lock the folder Y/N. If you press y then enter. it will lock the folder and your folder will be hidden.

To unlock run locker.bat again, it will ask to enter password, type in correct password then enter, you can see your folder back.

Please don�t change anything except password, otherwise this lock may does not work.

Note that: ***The default password is �yourpassword�. This is the only thing you�re gonna change in the code.***

Please comment and share your views

Read more ...

Windows 8 - Unlock the lock screen trick

                  Windows 8 - Unlock the lock screen trick

A lock screen is nice and pretty for a tablet and all, and perhaps for a little privacy in the office, but for your desktop at home it�s a barrier requiring more keyboard or mouse interaction just to use your PC. Save some sanity, time and RSI in your hand by disabling it.

Tap Windows key+R to bring up the �Run� dialogue box.

Type in gpedit.msc and press Enter.

Navigate to �Computer Configuration > Administrative Templates > Control Panel > Personalization�.

Double-click on the �Do not display the lock screen� setting.

Toggle it to �Enabled� and click �OK�.

Of course, you�ll still be presented with the login screen, which you may want to keep if more than one person uses your computer. However, if this is redundant for you, it can also be bypassed.

Read more ...

Facebook friend request sent when blocked new trics

         Facebook friend request sent when blocked new trics

Imagine that you are blocked from

sending Friend Requests by Facebook

for 2, 4, 7, 14 or even worse 30 days!

That would be a really serious problem

if you actually wanted to add someone

during that period. Now, you can! With

this simple trick you can send 1000's of

friend requests when when you are

blocked . There's just one part which

will be tough for you if you are going to

add unknown people. You will need the

Email address of the person you want to

add.

Head over to this Link . Here you will

find the place to add a friend through

their Email based on the different Mail

Services. But, if you 're thinking of

adding too many people then it would

be better that you create a contactfile.

For the people who don't know the

easiest way to create a contact file, here

it is:

1. Open a New text document (.txt) in

Notepad.

2. Add all the email addresses

separated by a comma (' , ').

3. Now save that file with the

extension .vcf

Now, this new file is your contact file.

Upload it to Facebook and you willbe

prompted to send friend request. Click

'OK' and that's it, you're done!

Simple yet effective! If you are not

blocked from sending Friend Requests

but still you get warnings like 'This

Friend Request Can't Be Sent' thenyou

can refer another trick which will help

you in bypassing this error here .

There's more in TechAmy which will

definitely help you in Facebook, just

head over here .

Read more ...

How to Remove Clothes in Photoshop cs5

Read more ...

How to reset nokia any mobiles

HOW TO RESETS NOKIA ANY MOBILE.C2-01 ,N72,N73 N95

Hello friends how to farmet nokia mobile series as show below.
Method 1. three fare reset for nokia phone keys.  (call answar buttom )

key and number .
2. while holding these buttoms .press the power  buttom and on the phone message.

Method 2. Hord Format of Nokia Mobile Phone

1. Swich off your Nokia phone

2. Now press following key sequence *#7370#

Enter Default lock code is 12345.

3. While holding these buttons.press the power button and swich  on the phone.

4. Wait fof message 'Formatting' to appear on the screen and release all keys 

once you see that message.

5. Now press following key sequenc *#7780#

clik here

Read more ...

How to chek your ip address

4.) Your IP Address appears on the scren.

clik here

3.) In the command window tppe "ipconfig" and press inter .

HOW TO CHEK YOUR ID ADDRESS

How can i find my computer.s IP address

Windows

1.) Press the windows key +R. oor from the start menu .clik Run.

2.)Type "cmb" and clik OK

Read more ...

How To Delet Viruses In Pen Drives

How to delete viruses in pen drives without software










It's very cool tricks.it will helpful trick of everyone .so you want do it follow this
steps are here:

1). Cannect your pendrive and do nat open it by using autorun .

2). Open run  and type cmd and press inter.

3). In the command prompt , Type the pendrive letter of your pendrive (you can check
     it form my computer) then press enter .

4). Type dir/w/o/a/p and press enter.

5). Now i that list search for virus filelist:

Nutorun.inf

New folder.exe

Bha.vbs

Lexplore .vbs

Info.exe

Ravman.exe

any other file with .exe Extension.*
6). If it contains any of the file then type attrib-h-r-s-a** and press Enter.

7). Delete each of that file using delete command delete filename
     (For exaple: del new _folder.exe
     Goto

Read more ...