Windows 8 and 8.1 Forums


Event 7 Bad block in HDD but normal SMART?

  1. #1


    Posts : 191
    Windows 8.1 (Update 1) Pro 64 bit

    Event 7 Bad block in HDD but normal SMART?


    Good day,

    To my surprise, when looking at the log events, I noticed 74 error logs starting from 27th of April saying "Bad block found in device /Device/Harddisk0\DR0

    From what I know (although I'm not sure) you can look up the number of the disk in Disk Management and I found that "Disk 0" seems to be my main harddrive. Which is a Hitachi HDS921010DLE630

    I used Speccy to retrieve the S.M.A.R.T. data wich are shown in the attachment.

    Here's the problem; according to Speccy, these SMART data shouldn't be of any concern since it shows "Good" in all attributes. Although it's all considered "Good", it does show the status as "Warning". The temps are good (29 degrees)
    Perhaps someone with more knowledge on this could interpret these results better?

    Performing checkdisk also shows that there are no issues nor bad sectors found.

    What could be the cause here and should I be worried? Could this by any chance be a false positive and if so, caused by what?
    Attached Thumbnails Attached Thumbnails Speccy3.jpg  
    Last edited by JohnnyGui; 03 May 2016 at 16:05.

      My System SpecsSystem Spec

  2. #2


    Austin TX metro area
    Posts : 638
    Windows 7 Pro 64bit [MS blue-disk set]


    Booting a usb or dvd boot is best, however, in any way, shape or form: Using anything similar to Macrium Reflect or Acronis True Image, please make one if not two full images of both your OS partition and your data partition onto at least one if not two external hard-drives. You might have months, weeks, or only days or hours -- there is no way to predict. hddguru.com has forums which discuss the hazards of attempting recovery of the information inside of weakening or bad sectors. Backups should be made real soon. And, you might check some of your most important data files with the originating programs to ensure you are not going to get a nasty surprise -- corrupted file[s] due to "moved to another sector" HD internal operations.
      My System SpecsSystem Spec

  3. #3


    Posts : 191
    Windows 8.1 (Update 1) Pro 64 bit


    Quote Originally Posted by RolandJS View Post
    Booting a usb or dvd boot is best, however, in any way, shape or form: Using anything similar to Macrium Reflect or Acronis True Image, please make one if not two full images of both your OS partition and your data partition onto at least one if not two external hard-drives. You might have months, weeks, or only days or hours -- there is no way to predict. hddguru.com has forums which discuss the hazards of attempting recovery of the information inside of weakening or bad sectors. Backups should be made real soon. And, you might check some of your most important data files with the originating programs to ensure you are not going to get a nasty surprise -- corrupted file[s] due to "moved to another sector" HD internal operations.
    I have indeed made a backup of my wanted data. Is it that serious? How come Speccy say that everything is fine?
      My System SpecsSystem Spec

  4. #4


    Austin TX metro area
    Posts : 638
    Windows 7 Pro 64bit [MS blue-disk set]


    Well, it's possible that I am overreaching the seriousness, I do not know where on the continuum is Speccy's HD report. For a second opinion, download, install, run Auslogics DiskDefrag's SMART section, see what it says. If both report green, all might be well. Please keep your backups current. Perhaps, others in eightforums.com will enter in and give their advice.
      My System SpecsSystem Spec

  5. #5


    I recommend you open an elevated command prompt and run chkdsk /r on the drive. When prompted to allow chkdsk to run at next boot, follow the prompts to allow that, then reboot. Depending on the size of the drive, this process could take many hours (even overnight) to complete, with the system often appearing to be frozen. Just let it run. If it finds errors it cannot correct, or if you keep getting errors in Event Viewer, I would start looking for sales on drives. Remember ALL drives WILL fail - eventually - especially those with moving parts.

    Note that S.M.A.R.T. is not an industry standard so it is not always consistently implemented correctly on all systems. A S.M.A.R.T. error that cannot be corrected does typically suggest the drive's reliability is failing. But a lack of a S.M.A.R.T. error does not mean the drive is perfectly okay.

    You might also go by the drive maker's own diagnostics utility HGST Windows Drive Fitness Test. Note that Hitachi is now part of Western Digital.
      My System SpecsSystem Spec

  6. #6


    Posts : 191
    Windows 8.1 (Update 1) Pro 64 bit


    Quote Originally Posted by Itaregid View Post
    I recommend you open an elevated command prompt and run chkdsk /r on the drive. When prompted to allow chkdsk to run at next boot, follow the prompts to allow that, then reboot. Depending on the size of the drive, this process could take many hours (even overnight) to complete, with the system often appearing to be frozen. Just let it run. If it finds errors it cannot correct, or if you keep getting errors in Event Viewer, I would start looking for sales on drives. Remember ALL drives WILL fail - eventually - especially those with moving parts.

    Note that S.M.A.R.T. is not an industry standard so it is not always consistently implemented correctly on all systems. A S.M.A.R.T. error that cannot be corrected does typically suggest the drive's reliability is failing. But a lack of a S.M.A.R.T. error does not mean the drive is perfectly okay.

    You might also go by the drive maker's own diagnostics utility HGST Windows Drive Fitness Test. Note that Hitachi is now part of Western Digital.
    Thanks for the info. Something weird just happened. So I ran chkdsk /r at next boot and after it finished I let Speccy show me the S.M.A.R.T. data again and now it says that the HDD has 602 Reallocated Sectors Count (359 before), and 64 Current Pending Sector Count (16 before).
    Could a chkdsk /r provoke such a thing? See the attachment for the log of the chkdsk /r.

    The HGST WDF test you linked me to doesn't show my HDD in the list so I can't select and scan it with the program for some reason.
    Event 7 Bad block in HDD but normal SMART? Attached Files
      My System SpecsSystem Spec

  7. #7


    Austin TX metro area
    Posts : 638
    Windows 7 Pro 64bit [MS blue-disk set]


    By the way, when I recommended Auslogics DiskDefrag -- I meant to include: do only advanced/custom install! Do not use normal/express install. Custom/advanced install lets you UNclick the unwanted stuff, and lets you decline the offer[s] following the defrag install.
      My System SpecsSystem Spec

  8. #8


    Posts : 191
    Windows 8.1 (Update 1) Pro 64 bit


    Quote Originally Posted by RolandJS View Post
    By the way, when I recommended Auslogics DiskDefrag -- I meant to include: do only advanced/custom install! Do not use normal/express install. Custom/advanced install lets you UNclick the unwanted stuff, and lets you decline the offer[s] following the defrag install.
    I'm considering to fully zero-write the harddrive to scan and see if it can reallocate the bad sectors.
    I have a Hitachi HDD but I'm not sure which software to use for this. Any ideas on this?
      My System SpecsSystem Spec

  9. #9


    chkdsk will attempt to repair any bad sectors. If it cannot, it will move any data there to a good spot, them mark the old as bad. If me, I would run it again.

    Zero write does not do anything in terms of recovering any bad sectors. A full (not quick) will hit every storage location and if bad, mark it bad and unusual but of course, will delete any data you might want to keep.
      My System SpecsSystem Spec

  10. #10


    Posts : 191
    Windows 8.1 (Update 1) Pro 64 bit


    Quote Originally Posted by Itaregid View Post
    chkdsk will attempt to repair any bad sectors. If it cannot, it will move any data there to a good spot, them mark the old as bad. If me, I would run it again.

    Zero write does not do anything in terms of recovering any bad sectors. A full (not quick) will hit every storage location and if bad, mark it bad and unusual but of course, will delete any data you might want to keep.
    The thing is, that there are an increasing number of pending sectors that chkdsk apparently can't seem to correct. Zero-writing would delete everything on these sectors (the HDD would "notice" that the data on it is irrelevant) and not use it in the future, at least that's what I read
    about it.

    What I want is to start fresh with data only on the working sectors and not have any pending ones. And see from there how it will go.
      My System SpecsSystem Spec

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Event 7 Bad block in HDD but normal SMART?
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