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 Post subject: Re: Seagate ST2000DL001 Dropped. Issues After Head Swap
PostPosted: March 30th, 2015, 14:10 
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Joined: March 18th, 2015, 4:32
Posts: 10
Location: Azerbaijan
Dear Friends,

Thank you very much for your valuable opinions. I do really appreciate your help.

We identified media damages on the hard drive - the platter set was not in alignment due to the drop impact.

Another question is that we have just purchased a good fume hood for clean-room environment. Is it really make a big difference opening hard drives in clean-room and in an ordinary environment? I want to know if there are real case where a few small dust particles cause any drives failed?

Thank you


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 Post subject: Re: Seagate ST2000DL001 Dropped. Issues After Head Swap
PostPosted: March 31st, 2015, 4:24 
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Joined: January 28th, 2009, 10:54
Posts: 3156
Location: Greece
zeydullak wrote:
Is it really make a big difference opening hard drives in clean-room and in an ordinary environment? I want to know if there are real case where a few small dust particles cause any drives failed?


Yes.

We have made a case study about this. I can't share the entire document, but in a nutshell, we took a drive (in this case a WD Tornado 320GB) and ran a surface scan. This is initial result:
Attachment:
000-001-199.jpg
000-001-199.jpg [ 54.97 KiB | Viewed 1321 times ]


Then we opened drive in clean room, let it stand there for 30 minutes, closed it up and ran the same scan, in the same area of the drive. Here is the result:
Attachment:
001-000-000.jpg
001-000-000.jpg [ 66.46 KiB | Viewed 1321 times ]


Finally, we opened drive in our workbench, let it stand there for 30 minutes, closed it up and ran the scan again, in the same area. And...
Attachment:
001-000-0105.jpg
001-000-0105.jpg [ 83.92 KiB | Viewed 1321 times ]


Out of curiosity, we let the drive run for as long as it could take. In another 15 minutes one of the heads died.

Hope that helps.

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