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 Post subject: Re: Quantum Fireball Plus AS 60GB
PostPosted: May 29th, 2014, 10:42 
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Joined: April 9th, 2014, 7:18
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Location: United Kingdom
Quote:
When head's can't read the SA it's life were over the head calibration IC get heat up some time burn or dead the retry system of detection not work because of this heat-up IC. You have to cool this smooth IC somehow like we cool CPU processor and retry upto 100 time's to get the detection when detection come's this IC no more heat up...


Can I try putting it in the fridge then?!


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 Post subject: Re: Quantum Fireball Plus AS 60GB
PostPosted: May 29th, 2014, 10:58 
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Joined: December 5th, 2011, 5:38
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Location: Verona, Italy
Quote:
Can I try putting it in the fridge then?!


:lol:
yes, if you wanna kill your data due to condensation that would form on the platters.

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 Post subject: Re: Quantum Fireball Plus AS 60GB
PostPosted: May 30th, 2014, 4:12 
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Joined: September 8th, 2009, 18:21
Posts: 16955
Location: Australia
michael chiklis wrote:
Quote:
Can I try putting it in the fridge then?!


:lol:
yes, if you wanna kill your data due to condensation that would form on the platters.

Both Seagate and Hitachi have HDDs with an operating temperature range as low as -30degC. The non-operating temperature range is as low as -40C.

http://www.seagate.com/staticfiles/supp ... 48541e.pdf
http://www.hgst.com/tech/techlib.nsf/te ... N4K100.pdf

In fact I recall that Doomer operated a standard drive at -20C for a short time without any damage.

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 Post subject: Re: Quantum Fireball Plus AS 60GB
PostPosted: May 30th, 2014, 6:11 
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Joined: December 5th, 2011, 5:38
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Location: Verona, Italy
I do not think the real problem would be the low temperature of the fridge, rather than condensation would form on the platters.
Condensation might kill heads, then bad heads could cause further damage to platters

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 Post subject: Re: Quantum Fireball Plus AS 60GB
PostPosted: May 30th, 2014, 14:34 
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Joined: May 27th, 2014, 14:03
Posts: 13
Location: Tokyo - Japan
Michael S wrote:
Quote:
When head's can't read the SA it's life were over the head calibration IC get heat up some time burn or dead the retry system of detection not work because of this heat-up IC. You have to cool this smooth IC somehow like we cool CPU processor and retry upto 100 time's to get the detection when detection come's this IC no more heat up...


Can I try putting it in the fridge then?!


Send the drive to someone from the "old times";
Anyone familiar with HRT, HDD.EXE, PC-3000 ISA, etc would be able to do magic on that old drive.
You need firmware tools, not fridge.


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 Post subject: Re: Quantum Fireball Plus AS 60GB
PostPosted: May 30th, 2014, 15:11 
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Spildit-Temp wrote:
Anyone familiar with HRT, HDD.EXE, PC-3000 ISA, etc would be able to do magic on that old drive.
You need firmware tools, not fridge.

Doesn't the drive have 3 dead heads? Or can a weak head produce the same symptom, and if so, would a hot swap enable these weak heads to be accessed?

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 Post subject: Re: Quantum Fireball Plus AS 60GB
PostPosted: May 30th, 2014, 15:27 
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michael chiklis wrote:
I do not think the real problem would be the low temperature of the fridge, rather than condensation would form on the platters.
Condensation might kill heads, then bad heads could cause further damage to platters

I used to think the same as you. However, according to Doomer, condensation cannot form unless a surface and the surrounding air are at different temperatures. Yet, if you read Seagate's product manuals, one of the reasons for the breather hole is to "allow condensation inside the hard disc to escape". This sounds a little ambiguous to me.

Barracuda 7200.10 PATA Product Manual:
http://www.seagate.com/staticfiles/supp ... 02369f.pdf

Quote:
3.2
Breather filter hole precautions

Caution: Do not cover, seal, or insert any object into this hole.

This hole has two purposes:
• To allow condensation inside the hard disc to escape
• To allow air pressure inside the hard disc to equalize with ambient pressure


EE25.2 Series Product Manual:
http://www.seagate.com/staticfiles/supp ... 48541e.pdf

Quote:
3.3 Breather filter hole precautions

Caution: Do not cover, seal, or insert any object into this hole.

This hole has two purposes:
• To allow condensation inside the hard disc to escape
• To allow air pressure inside the hard disc to equalize with ambient pressure

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 Post subject: Re: Quantum Fireball Plus AS 60GB
PostPosted: May 30th, 2014, 18:13 
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Joined: December 14th, 2011, 8:24
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Given 25C room temperature, 40% relative humidity, and volume of a hard drive 0.0001 m3, it holds about 0.001 gram of water inside the drive.
If you cool it down to -20C, about 0.0009 gram will condense, assuming the breather hole is sealed (I don't think the breather hole is of much use in this case, as there will be not much air exchange between inside and outside the hard drive).

Not sure we should be worried about this amount?


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 Post subject: Re: Quantum Fireball Plus AS 60GB
PostPosted: May 30th, 2014, 18:26 
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I would think that even the minutest amount of condensation on a platter would crash a head.

I wonder if this could be a subject for MythBusters, although it's probably a bit too geeky for the general audience, unless Jamie could work out a way to blow something up. :-)

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 Post subject: Re: Quantum Fireball Plus AS 60GB
PostPosted: June 2nd, 2014, 7:43 
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Joined: April 9th, 2014, 7:18
Posts: 22
Location: United Kingdom
Ok, I think I'll forget about the fridge!

Quote:
Doesn't the drive have 3 dead heads? Or can a weak head produce the same symptom, and if so, would a hot swap enable these weak heads to be accessed?


Is this something I can try or should I send it to the experts? Presumably it involves swapping boards while maintaining power.


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