Re: [MLUG] Hardisk Sound?

["Christian M. Cepel" <EMAIL:PROTECTED>]

Keep in mind that that's a "last ditch effort" "worst case scenario" 
solution.  You do it if you've tried everything else and you're sure the 
heads are still locked (Dug into) the platter surface.   It's just so 
you can try to recover data from a dead drive.   You're just as likely 
to cause more damage as to fix anything.  Remember, even though it's not 
spinning at the time, there are multiple heads, and none of them are 
supposed to touch the platter surface.  Jogging one loose might cause 
the first defect in 3 other platters or sommat that leads to those 
chattering as well.

Every time you mess with a drive to get information off 'before it dies' 
you are running the risk of damaging it further.  You've got a tiny 
unknown window of partial readability to get what you can off.

Here's my philosophy towards data recovery, keeping in mind that I've 
never recovered a blinkin thing off any drive.

Do not boot the drive into windows or whatever.     Pick your priorities 
in order of which you most wish to recover and plan to start on that 
first...  DO NOT try to recover the whole drive... You'll get NOTHING 
instead of 'something'.  Put it on a machine containing disk utilities, 
where you're sure it won't be mounted and spun up until the utilities 
look at it.  Use the utility to go down your list of priorities and get 
as far as you can before the drive dies.


Tresalizbeth wrote:

> Another fun thing to do with a balky hard drive, fun fun!!!!!!!
>
>> The other is just to drop the darn thing from varying heights to jar 
>> the heads loose.
>
>
>
>
>
>
> Christian M. Cepel wrote:
>
>> I believe it can be either of two things.
>>
>> 1.  A drive repeatedly attempting and failing to read a sector, and 
>> the clicking being the repeated snapping of the heads back over the 
>> same region.
>>
>> 2.  Read head chattering.  There's an infintesimal space between the 
>> head and the spinning platter.  Any debris, or deformations in the 
>> platter will cause the head to click as it spins past.   This is 
>> usually a very bad thing as it tends to end up chattering the head 
>> against the platter causing more and more deformations in the platter 
>> surface until the head digs into the surface and 'freezes'.   George 
>> Robb of LAPS has some wonderful techniques to unfreeze the heads to 
>> attempt data recovery.  One technique is; he puts it in the freezer 
>> so that the bimetalic properties of the head & arm composition cause 
>> the head to flex off of the platter.  The other is just to drop the 
>> darn thing from varying heights to jar the heads loose.
>>
>>
>> Jonathan King wrote:
>>
>>> On Tue, 29 Jun 2004 15:31:11 -0500, Mark Rages
>>> <EMAIL:PROTECTED> wrote:
>>>  
>>>
>>>> The old "click,click,click" is still with us too.  I just replaced a
>>>> disk making that sound yesterday.
>>>>   
>>>
>>>
>>>
>>> Ah!  Not "click,click,click"!  I was trying to forget that one. :-) 
>>> What I did forget was what kind of death that noise signifies.
>>>
>>> jking
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>>>  
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