Harddisks mailfunction after being stored for a long while
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Posted by Marcel Overweel on July 7, 2008, 7:38 am
Please log in for more thread options > Somewhere on teh intarweb "Mike Walsh" typed:
>> ~misfit~ wrote:
>>>
>>> Somewhere on teh intarweb "Paul" typed: >>> >>> [snip] >>> >>>> 4) The drive has a breather hole and particulate filter, and >>>> on the outside of the drive, the label will say "don't cover >>>> this hole". The breather equalizes the atmospheric pressure, >>>> so that the air pressure inside the drive, is the same as the >>>> atmosphere. The filter on the breather hole removes dust >>>> particles, and has some resistance to moisture. But corrosive >>>> gas could get through. >>> >>> And/or moisture. >>> >>> Unless the drive is stored in a temperature-controlled environment >>> everytime it heats up or cools down (i.e. every day) there is going >>> to be air movement through that tiny breather hole. Most air is >>> moist. Condesation inside the drive in storage isn't a maybe, it's a >>> 'for sure'. (Running drives create heat which largely solves the >>> condensation problem and then, due to air expanion, drives the >>> moisture out.) >>
>> Condensation will not occur unless the relative humidity reaches >> 100%. >
> Really? > > "Water vapor will only condense onto another surface when the temperature > of that surface is cooler than the temperature of the water vapor." > > http://en.wikipedia.org/wiki/Condensation > >> That rarely happens in a building with heat and air
>> conditioning. >
> My home doesn't have either. This room temp was 11°C this morning when I > was reading newsgroups. In summer it can reach 38° or so. Summer day/night > fluctuations are fairly significant. Enough to 'pump' a fair bit of air in > and out of a casing. > >> The amount of air going through the breather hole
>> during daily temperature changes is insignificant compared to the >> amount of air that goes through during during normal use when the >> drive is powered on and off. >
> Maybe so but during 'normal use' the drive is producing heat which helps > prevent any moisture from condensing. > > TTFN, > -- > Shaun. > > DISCLAIMER: If you find a posting or message from me > offensive, inappropriate, or disruptive, please ignore it. > If you don't know how to ignore a posting, complain to > me and I will be only too happy to demonstrate... ;-) > Thanks guys, much to read, but the end of the story: it could have been everyting. :) Thanks! Marcel | |||||||||||||
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Posted by ~misfit~ on July 7, 2008, 7:00 pm
Please log in for more thread options >> Somewhere on teh intarweb "Mike Walsh" typed:
>>> ~misfit~ wrote:
>>>> >>>> Somewhere on teh intarweb "Paul" typed: >>>> >>>> [snip] >>>> >>>>> 4) The drive has a breather hole and particulate filter, and >>>>> on the outside of the drive, the label will say "don't cover >>>>> this hole". The breather equalizes the atmospheric pressure, >>>>> so that the air pressure inside the drive, is the same as the >>>>> atmosphere. The filter on the breather hole removes dust >>>>> particles, and has some resistance to moisture. But corrosive >>>>> gas could get through. >>>> >>>> And/or moisture. >>>> >>>> Unless the drive is stored in a temperature-controlled environment >>>> everytime it heats up or cools down (i.e. every day) there is going >>>> to be air movement through that tiny breather hole. Most air is >>>> moist. Condesation inside the drive in storage isn't a maybe, it's >>>> a 'for sure'. (Running drives create heat which largely solves the >>>> condensation problem and then, due to air expanion, drives the >>>> moisture out.) >>> >>> Condensation will not occur unless the relative humidity reaches >>> 100%. >>
>> Really? >> >> "Water vapor will only condense onto another surface when the >> temperature of that surface is cooler than the temperature of the >> water vapor." http://en.wikipedia.org/wiki/Condensation >> >>> That rarely happens in a building with heat and air
>>> conditioning. >>
>> My home doesn't have either. This room temp was 11°C this morning >> when I was reading newsgroups. In summer it can reach 38° or so. >> Summer day/night fluctuations are fairly significant. Enough to >> 'pump' a fair bit of air in and out of a casing. >> >>> The amount of air going through the breather hole
>>> during daily temperature changes is insignificant compared to the >>> amount of air that goes through during during normal use when the >>> drive is powered on and off. >>
>> Maybe so but during 'normal use' the drive is producing heat which >> helps prevent any moisture from condensing. >> >> TTFN, >
> Thanks guys, much to read, but the end of the story: > it could have been everyting. :) Indeed. After reading this I spent a bunch of time with about 15 old HDDs I have, some SCSI, some IDE, friring them up one by one on my testbed machine only to give up halfway through. They can all go into the rubbish. Only one of the disks I tested worked and it was only 2GB. Actually, I'll get my "odd screwdriver bit set" out and pull them to bits, I might find a few strong magnets that I can remove..... Cheers, -- Shaun. DISCLAIMER: If you find a posting or message from me offensive, inappropriate, or disruptive, please ignore it. If you don't know how to ignore a posting, complain to me and I will be only too happy to demonstrate... ;-) | |||||||||||||
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Posted by Calab on July 4, 2008, 2:16 pm
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| Hi, | | I have the tendency to store old and unused hardware whenever I | think I might be handy in the future. I've stored drives for years and never had any issues putting them back into use. Since you're having issues, I'd guess that the drives may have been marginal when put into storage. What I'd do is connect them to the machine and just let them spin for a few hours. If the hardware doesn't break right away, the extended run and heat would help move any lubricants around and get the drive into proper operation. If you still had issues, I'd suspect the cabling, BIOS configuration or that the drives are just plain defective. | |||||||||||||
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Posted by Marcel Overweel on July 7, 2008, 7:35 am
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>
> > | Hi, > | > | I have the tendency to store old and unused hardware whenever I > | think I might be handy in the future. > > I've stored drives for years and never had any issues putting them back > into > use. > > Since you're having issues, I'd guess that the drives may have been > marginal > when put into storage. What I'd do is connect them to the machine and > just > let them spin for a few hours. If the hardware doesn't break right away, > the > extended run and heat would help move any lubricants around and get the > drive into proper operation. If you still had issues, I'd suspect the > cabling, BIOS configuration or that the drives are just plain defective. > > No, it's just the drives. Newer drives run just fine on same mobo and cables. But the drives were 'old-ish' already so could be a combination of age and moisture?, fungus?, who knows? maybe even the Illudium PU-36 Explosive Space Modulator? :) thanks, Marcel | |||||||||||||
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Posted by ~misfit~ on July 7, 2008, 6:55 pm
Please log in for more thread options Somewhere on teh intarweb "Marcel Overweel" typed:
>>
>> >>> Hi,
>>> >>> I have the tendency to store old and unused hardware whenever I >>> think I might be handy in the future. >>
>> I've stored drives for years and never had any issues putting them >> back into >> use. >> >> Since you're having issues, I'd guess that the drives may have been >> marginal >> when put into storage. What I'd do is connect them to the machine >> and just >> let them spin for a few hours. If the hardware doesn't break right >> away, the >> extended run and heat would help move any lubricants around and get >> the drive into proper operation. If you still had issues, I'd >> suspect the cabling, BIOS configuration or that the drives are just >> plain defective. >
> No, it's just the drives. > Newer drives run just fine on same mobo and cables. > > But the drives were 'old-ish' already so could be a combination of > age and moisture?, fungus?, who knows? > maybe even the Illudium PU-36 Explosive Space Modulator? :) Fungus used to cause problems with floppy discs if they weren't kept completely dry. The substrate (glue) that held the magnetic layer onto the disc actual was a protien-based glue which fungus could eat. :-) I don't think that fungus would effect HDDs, unless it's mutated! The spores of a data-eating fungus that will, in the near future, take over the world with all the data it's managed to accumulate! Eeeeeeeek! We're doomed to being slaves to giant mushrooms! -- Shaun. DISCLAIMER: If you find a posting or message from me offensive, inappropriate, or disruptive, please ignore it. If you don't know how to ignore a posting, complain to me and I will be only too happy to demonstrate... ;-) | |||||||||||||
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