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My laptop’s 2.5 inch hard disk become very slow. According to the symptoms outlined below, is the I am experiencing problem is located on the hard disk drive’s platters or the hard disk drive’s board?

It takes 45 minutes to open the welcome screen. I removed it from my laptop and I’ve used it as external through USB 3.0 so I could rescue the data. But it is still very slow and it is not able to read some files sometimes.

For instance the first day, I was not able to open some files with a “read error” but the second day I was able to open and transfer them for about 10 minutes… Then it gave a “read error” again.

Please note that I dont hear any weird sounds, I dont face any other problem than: Very, very slow operations and files that are sometimes readable, sometimes not.

In case it helps, the file system is Mac OS X Extended (Journaled).

closed as too broad by JakeGould, mdpc, Kevin Panko, DavidPostill, Nifle Apr 9 '15 at 11:22

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • “In case it helps, the file system is Mac OS X Extended (Journaled).” You are providing software/OS level info but you still have no provided the actual hard drive make and model number. This can be helpful in diagnosing an issue because some makes and models of hard drives are more prone to failure—having known issues—than others. – JakeGould Apr 7 '15 at 14:38
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According to the symptoms outlined below, is the I am experiencing problem is located on the hard disk drive’s platters or the hard disk drive’s board?

Short answer:

If the system is slow to read the sectors and the data they contain, the hard drive is failing. The problem is the the magnetic media on the hard drive’s platters is degrading to the point of failure. Thus the hard drive is struggling to read the data off of the magnetic media on the platters, thus the drive is clearly on it’s last legs.

Long answer.

In a case like this it would seem like your hard disk drive is simply dying. This is typically related to the physical mechanism of the drive—the platters, spindle and drive heads—failing in some way.

As for what to do, honestly no clear answer. Since you do mention the hard disk drive’s platters, I will say this: If the data on that drive is important to you, opening up the physical mechanism itself to attempt to “fix the platters” will only guarantee one thing: 100% no hope of data recovery whatsoever. Do not ever attempt to open a hard drive mechanism if you care about recovering the data contained on it.

My best recommendation to you is to see if you can mount it again. I assume you are using an external enclosure that is perhaps a USB enclosure? One idea might be that if this is a 2.5" drive mechanism, it’s somehow not getting enough power from the USB connector. And if you have it in an external enclosure, it’s probably being powered by the USB port itself. So maybe getting an external USB enclosure that you can hook up an AC adapter to would help?

But all in all, the behavior you describe is in line with complete drive failure. If there is a desire to recover that data, you might want to investigate sending it to a data recovery service. Which is not a cheap proposition—could cost several hundred U.S. dollars—but of the data is important to you and the drive cannot be accessed by you, a data recovery service might be the best and only hope you have to recover data from that device.

  • thank you very much for your answer. i dont hear any weird sounds so i reject a problem in spindle and drive heads. – Decs Resat Apr 7 '15 at 11:33
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    @DecsResat - There are tools that tell you if the firmware has detected a failure. If I were to guess the problems is you have to many bad sectors and the reason it takes 45 minutes to boot is because the operating system is spending all its time attempting to read the data. The drive has failed. – Ramhound Apr 7 '15 at 12:32
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    @DecsResat What Ramhound said. A hard drive can fail without ever making any weird sounds. – JakeGould Apr 7 '15 at 14:05
  • thanks jakeGould for your participation, but what i actually ask is: according to those two symptoms, the problem is on hdd's platter or the hdd's circuit board? – Decs Resat Apr 8 '15 at 3:20
  • @DecsResat If the system is slow to read the sectors and the data they contain, the hard drive is failing. The problem is the the magnetic media on the hard drive’s platters is degrading to the point of failure. Thus the hard drive is struggling to read the data off of the magnetic media on the platters, thus the drive is clearly on it’s last legs. – JakeGould Apr 8 '15 at 3:25

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