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Seagate hard drive

I have a seagate hard drive that has crashed. i have opened the hard drive and the platters do spin. the head just moves back and forth not covering the entire surface of the platter.the head just CLICKS BACK AND FORTH.the hard drive is not being picked up by my notebook or even by my desktop if i use it as an external drive.will it be possible to recover my data and if so how can i do this?

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Re: seagate hard drive

If your PC can detect the harddrive as an external drive there is a possibility to recover your files. try using stellar-phoenix, download it at, register first then you can use their search facility to browse files. I am using stellar-phoenix for a long time, it works well. Good luck

Posted on Feb 18, 2008

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Is ther anythng I shud be worried about if my pc fell off the top shelf and is stil working properly

Check to see if your pc has a SSD drive (Solid state Drive).
If it does and it still works.... you should be good.
Reason: SSD units have no moving parts.

Non-SSD drives have spinning platters.
Any hard drives listing rpm's (Rotations per minute) spin at high speeds. Example: 7200 rpm's
A drop like that could cause the heads to crash into these platters.
Just watch to see if data starts to disappear or the pc acts really slow. The good news, most hard drives with rpm listing made recently park the heads to prevent damage from drops or sudden bumps.
Good luck and hope this helps

Apr 11, 2015 | Microsoft PC Laptops

1 Answer

After an accidental drop I am getting Bootmgr image is corrupt.system cannot boot, anyone know why? I tried using the window 7 disk, it won't boot with it either

Let me start with explaining the basic construction of a Harddrive.

This is what the Dell Inspiron 1545 harddrive looks like on the outside,


Scroll down to the heading - Removing the Hard Drive
Go down to the second illustration under this heading.
Number 3 points to the Hard Drive.

2) Another look. This time at a basic Harddrive that fits in a laptop computer,

A) See the round shiny disk? This is a Platter.
There may be from 3 to 6 Platters.

Platters resemble CD or DVD disks. They are usually made of metal, or glass. On the Top surface, and Bottom surface they are coated with a magnetic media.

Usually a ferrous substance. (Iron like)

Immediately below the Platter shown, is a Read/Write Head attached to an Actuator Arm.
The Read/Write Head cannot be clearly seen.

The Actuator Arm is the slim triangle shaped part.
(Has three holes in it, and the big end has a round shape in the middle)

There is an Actuator Arm, and Read/Write Head, for the Top surface, and the Bottom surface, of every Platter.

The Read/Write Head does as the name implies. It Reads information off of the Platter, and Write information to it.
{ It arranges the magnetic medium on the Platter, when it is writing to the Platter }

More information on the basic construction of a Harddrive,

(6 pages)

The Platters may spin up to 5400, or 7200 Revolutions Per Minute.

The Read/Write Heads are spaced VERY close to the Platters.

(From my understanding, approximately 1/10th the thickness of an average Human hair. An average human hair is 3 thousandths thick.
{ .003 )

Due to the speed of the spinning Platter, and the closeness of the Read/Write Head to the Platter, there is a cushion of air formed in-between the Read/Write Head, and the Platter.

When the computer is not on, the Actuator Arm is in a parked position.
(Seen in the Tigerdirect link)
This means the Read/Write Head is AWAY from the Platter.

When the computer is on however, the Read/Write Head is located right above the Platter.

(Probably to the outside edge, and the Sector/Tracks where the basic Windows Boot files are located)

When you dropped the laptop apparently the Read/Write Head/s wiped off some of the magnetic media on the Platter/s, and damaged the boot sector.

Try this,

If to no avail buy another harddrive. Set the laptop so that it's ready to have another harddrive installed, THEN remove the old harddrive, and install the new one.

Keep the old one to install into an inexpensive external enclosure, and copy off all of your personal info,

Then plug it's USB cable into any available USB port, on a working computer.

For additional questions please post in a Comment.


Jan 28, 2012 | Dell Inspiron 15 Laptop

1 Answer

My computer drive crashed. How can I retrieve the data?

If the operating system program was all that crashed, then yes, you may be able to recover data. If the hard drive itself failed totally, then your only possible option is to take it to a data recovery specialist. They can often recover data off these devices as they have special tools and software to do it. They are expensive, though, so unless the data you are looking to recover is very important to you, it;s probably not worth the cost.Now if the hard rive itself still runs, but just won't run Windows, you can remove the hard drive and connect to to another PC as an add-on drive and access the files that way.

Jan 14, 2012 | PC Laptops

1 Answer

My Satellite A205-S5804 crashed and will not boot up in Window. I suspect that the hard drive is shot, however, how do I know for sure. It makes a tick tick tick sound, pause, then tick tick tick again,...

How can you know for sure? Install the laptops harddrive into an economical external enclosure.
The external enclosure has a USB cable, that you just plug into any available USB port on a working computer.

THAT, is how you will know for sure.

A harddrives physical size is measured across it's Width.
Laptop harddrives are 2.5 inches across in width. (2 and a half inches)
(Desktop harddrives are 3.5 inches across in width)

Could you use a software program to check the harddrive out?
Not in this case.
You are not even getting to the Boot Record on the harddrive. The basic Windows files needed to start Windows.

The laptop harddrive in your Toshiba Satellite A205 series of Notebook PC, is a SATA harddrive.
Uses the SATA technology. (Serial ATA,

(Storage - Hard Drive - 120GB- Serial ATA - 150 - 5400RPM
{120GB capacity - SATA - Spindle speed can go UP TO 5400Revolutions per Minute }

One example out of many for a 2.5 SATA external enclosure,

$20 plus shipping, and tax.

This is assuming you wish to TRY to retrieve valuable information off of the harddrive.
I am Not posting that it Will. Yes, it is a gamble.
{You can also install a working laptop harddrive though, and use it for an external harddrive}

If using an external enclosure does Not solve the problem of retrieving info, then a professional service that performs this, will have to be used.
They will take the Platters out as a last resort, and insert them into a unit that resembles an open harddrive. (One method)

Let me explain basic harddrive construction, so you know what I mean by the term Platters.
I will also explain the ticking noises you hear.

Basic Harddrive Construction:

A harddrive has a metal case. Resembles two rectangular metal cake pans, put together.
Opening to opening.
The harddrive case has a special filter. This is under the label that states Do Not Block.
The filter regulates the atmosphere, essentially, inside the harddrive.

Inside the harddrive case are Platters. They resemble a CD or DVD disk. Usually made of metal, or glass.
There may be from 3 to 6 Platters. Perhaps more.
The Top surface, and the Bottom surface of Each Platter is coated with a magnetic medium.
(Ferrous substance)

The magnetic medium is arranged by the Write portion of the Read/Write Head.
Arranged in a pattern of 0's and 1's.
0 being OFF, 1 being ON.
This is converted so the computer can use it.

The Platters have a cylindrical Spindle going up through the middle of them. The Spindle is spun by a Spindle Motor.

There is a Read/Write Head on the Top, and Bottom of EACH Platter.
The name implies exactly what the Read/Write Head does.
The Read portion of the head, when activated, reads what is on the Platter.
The Write portion, when activated, writes to the Platter. (Arranges the magnetic medium on the Platter)

Each TWO Read/Write Heads are mounted on an Actuator Arm. The Actuator Arm is moved by an Actuator Motor.
The Actuator Arm moves the Read/Write Heads across the Platter to the inside (Towards the Spindle), and back to the outside of the Platter.

[When in full operation, the Actuator Arm can move back, and forth, at Hundreds of Times a Second]

The Read/Write Heads are mounted at a distance above the Platter, and below the Platter, that is VERY small.
Approximately .0003
(3 Ten-Thousandths of an Inch. In comparison the diameter of an average human hair is .003
Three-Thousandths thick.
This is 1/10th the thickness of an average human hair )

From moving so fast back, and forth across the Platters, a cushion of air is created in-between the Read/Write Heads, and the Platters.

IF, the Read/Write Heads become too close, they can wipe information off of the Platter.
(Wipe some of the magnetic medium off. This is known as a Head Crash)

The above mechanism is installed into the harddrive's case, in a Clean Room.
A room that is 99.9 percent dust free.
(Technicians who build harddrives must wear a special suit, (Almost looks like an astronaut suit), and go through a special Air Corridor, before entering the work area.

If the harddrive's case is opened, AND not in a clean room, the 'life expectancy' of the harddrive is down to a few hours, or LESS.
Right now the Actuator Arm is lightly slamming the Read/Write Heads into the Spindle.

On the bottom of the sealed harddrives case, is a small circuit board. (Printed Circuit Board)
This circuit board could be bad.
The only way to check without specialized test equipment, is to use a known to be good circuit board.
The same type of circuit board.
Means it should come from the same manufacturer, and model of harddrive.

Do they sell just the circuit board? Not to my knowledge.
It would have to come from another harddrive that is just alike.

More on the basic construction of Harddrive. (Proper name is Hard Disk),

For additional questions please post in a Comment.


Oct 31, 2011 | Toshiba Satellite A205-S5804 Notebook

1 Answer

Harddisk producing noise

If your hard disk is making noise-- BACK-UP all your data now! Noise from your drive indicates either you drive spindle bearings are about to seize up or your heads are crashing (actually scraping the media) on the platters.You will probably have a system failure and have to have the hard drive replaced.

Oct 20, 2011 | Dell Vostro 1510 Laptop

1 Answer

Can hard drives be knocked loose?

No, the hard drive should be firmly set in place with no less than 4 screws.
It can however get what's called a "head crash" where the internal parts of the hard drive hit each other and cause damage. Indicated by a rhythmic clicking sound or poor drive reliability.
Most modern hard drive platters are made of ceramic or glass, so knocking them around can do serous damage.

Aug 08, 2011 | Dell Latitude D600 Notebook

2 Answers

My Lenovo Z460 sometimes makes a ticking sound like a timebomb. Now it wont even startup........ Its less than a yr old. This only started happening 2 days ago

It probably is the disk-drive that has failed.
So, the "bad news" is all your data files probably are "lost", unless you have been making backups.
But, the "good news" is that "less than a year old" means that it is still under the Lenovo warranty.
Lenovo will replace the disk-drive, at minimal cost to you.
You'll need to reinstall Windows, and restore your files from your "backup".

May 22, 2011 | PC Laptops

2 Answers

Dropped laptop-IBM Thinkpad X21-display now reads "A disc read error occured" "Press ctrl-alt-del to restart" Bios is accessible but I am a novice in that area.

I don't think going into the BIOS Setup utility is going to help.

If the laptop was on when dropped, one or more of the Read/Write heads probably crashed right into the Platter/s.

To expound:

Inside the Harddrive case are Platters. These resemble CD disks, but are made of metal, or glass.
On the top, and bottom of the Platters a magnetic media is applied. Usually a Ferrite compound. (Read Iron)
There may be 3 to 6 Platters.

EACH Platter has a Read/Write head Above it, and Below it.
The Read/Write head does just what the name applies. Reads from the Platter, and Writes to the Platter.

[The magnetic media is arranged around the Platter, very similar to how information is arranged around on a CD, or DVD disk.
It is arranged in Circles, (Tracks), and segments within the Circle (Sectors)

The magnetic media is arranged by the Read/Write head, (Write portion actually), into a series of 1's, and 0's.
1 being ON, 0 being OFF.
The 0's and 1's are converted into machine language for the computer ]

The Read/Write heads are moved back, and forth across the Platters by an Actuator Arm.
When the computer is in use, (Computer using a program for example), the Read/Write heads can move back, and forth across the Platters at Hundreds of times a Second.

The Read/Write heads are in a stationary position away from the Platters, when the computer is not on.
When the computer is on, the Read/Write heads are positioned above, and below the Platters.
They are positioned VERY close to the Platters.

(So close, that that the movement when using the computer, actually has the Read/Write heads floating on a cushion of air)

Computer on, and dropping it can cause one, or more Read/Write heads to actually crash into the Platters, and wipe some of the magnetic media OFF.

This would mean replacing the Harddrive, AND having the Restoration Disk, (CD. Also may be known as System Restore disk, or Restore Disk)

No Restoration Disk means buying a new, fresh, genuine copy of Windows, and installing it, on the new Harddrive.

On the Platters in one of the sectors, is the Boot Sector for your Windows operating system.
It could be that when the Read/Write head/s crashed on the Platter/s, that part of the Boot Sector was wiped.

It could be by a slight chance that the Harddrive has come loose. Pulled away from the interface in the laptop that it is plugged into. THAT would be a stroke of luck, but advise do not get your hopes up.


2) IBM ThinkPad X21 Service Manual (Free)

Click on X20. This manual covers the X20, X21, X22, X23, and X24 models.

This is a PDF file. Allow a few seconds for the first page to come up, and additional time for the file to fully download. Let the file download all the way before looking through it.
There is a way to save a copy to your computer you are using now, and burn it off to CD disk, if you wish.
If you do not know how, please post in a Comment, and I will tell you.

Page 65
1040 - Hard disk drive

Oct 24, 2010 | IBM ThinkPad X21 2662 Notebook

1 Answer

Operating system not found

Ok, well either the drop has broken something on the motherboard, or, the hard drive, has been jolted so hard the heads have crashed into the platter, and killed the HDD. I would almost guarantee, that is whats wrong. Try taking out your HDD, hook it up to a USB, to HDD "Dongle" and see if your HDD responds, If it doesn't then you need a new HDD, if it does, the fault, is within the laptops circuits.

May 01, 2010 | PC Laptops

2 Answers

My HP Pavilion dv4 laptop has a humming noise

There are three components in this laptop that move. (Spin)
1.Cooling Fan
3.CD/DVD drive

A.It isn't the harddrive making the noise.

Inside the harddrive case are Platters. Platters resemble a CD disk, and are made of metal.
Typically there are 3 to 6 Platters inside.

For Each Platter there is a Read/Write Head, on the top surface of the Platter, and on the bottom surface of the Platter.

The Read/Write Head is connected to an arm. This arm moves the Read/Write Head across the Platter, and back to the home position. (Action resembles that of a phonograph player, with a record on it)

The Read/Write Head is located at the park position, (Away from the outside edge of the Platter), when the power is off to the computer. (Desktop or Laptop)

When the harddrive is in use, the Read/Write Head is approximately 1/2 thousandths of an inch above the Platter surface. (.0005 A typical human hair is 3 thousandths thick, or .003 Therefore the Read/Write Head is 6 times closer than the thickness of a human hair)

If your laptop is operating okay, the harddrive is unhurt.

[More detailed info with illustrations, in case there is an interest, ]

B.It isn't the CD/DVD drive because the extraneous noise happens all the time.

C.It's the Cooling Fan

The Cooling Fan is located on the bottom side of the laptop.
It's a small fan with tiny bearings, and can easily be damaged.

The fan blades could be hitting the fan shroud of the housing. (Shroud - Outside cage that surrounds the fan)
It is also mounted in a plastic housing that is rounded in shape, and has three protrusions that come out from the housing for mounting.
(Mounting to the motherboard)

These protrusions resemble 'Ears'.
One, or more of the Ears could have broken off.
The fan blades could be hitting the Base Enclosure. (Plastic bottom housing of laptop body)

This link is to HP Support, and the download page for the Maintenance and Service Guide, for the HP Pavilion dv4000 Series Notebook PC's.

[On this page Left-click on - HP Pavilion dv4000 Notebook PC and Compaq Presario v4000 Notebook PC - Maintenance and Service Guide

After you click on the link you may not see anything happening for up to 30 seconds. This PDF file is downloading in the background.
Advise do not start looking through it until it has fully downloaded.
You may break the download connection if you do ]

This will show you the Cooling System, and more specifically the Cooling Fan, and housing.

Page 177 starts with replacing the Fan Assembly.

The entire laptop has to be disassembled, except for the display to access the Cooling Fan assembly.
(Top cover is the Display Enclosure. The LCD screen fits in the Display Enclosure, and is mounted with a metal frame)

Dec 15, 2009 | HP Pavilion dv4000 Notebook

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