Cyclic redundancy check error!! Aaaaargh!

  NormanBolton 10:17 01 Oct 2014

Hi, I have recently had a cyclic redundancy check error on my external hard drive and now I can't access it at all although it is still recognised by windows. Is there any way to retrieve the data from it, or is it a lost cause? I am hoping for the former!!!

  Techpumpkin_WD 15:22 01 Oct 2014

Hello NormanBolton ,

I hope you might be able to restore access to your data. What have you tried so far? It's a good idea to cover the basic stuff first. You should try using a different USB cable, different port on the PC and if possible test on different machine. It's also a good idea to run the manufacturer's diagnostics tool to check the drive. If that doesn't help a bit more information about your situation would be useful. If I understood correctly after you had a CRC error you were able to access your external for a while? Have you performed any changes to the drive recently? What OS are you running? What is the model of the external drive? When you say it's recognized by Windows, does that mean that the drive is displayed in My Computer or do you find it only in Disc Management?

  NormanBolton 17:29 01 Oct 2014

Thanks for the help Jock and the questions from pumpkin. I am currently running a chkdsk and is has been going for 5 hours so far!! It is in stage four now.

I have tried different cables and ports and my other external has no problems with either ports or cables. I have not had the chance to test it on another system yet. I have not made any changes to the drive other than accessing files for a brief time after the error. No new files were added or removed. The drive did and still does show up in file manager, but now will only say it needs formatting before use. I am running windows 7 home premium and the drive is an LG HXD2 (500gb).

I think the chkdsk will be a while yet as it is busy replacing bad sectors and is only on 607 of 37360 files!!

  NormanBolton 06:58 02 Oct 2014

I have run chkdsk and diskpart however I think chkdsk finished early with an unspecified error (6e74667363686b2e b34) the last line of working was 15 percent complete. <623 of 37360 files processed> My drive is no longer showing in my computer :-(

  Techpumpkin_WD 08:33 02 Oct 2014

I don't want to cause panic, but it's possible that your HDD is dead. The question is how important is the data you had stored there. The most secure way to get the data back would be contacting a data recovery company/specialist. You could try DIY data recovery but it's not easy. So far it looks like your HDD has a problem with bad sectors, and every software that you run on the HDD to recover data could potentially make the situation worse and decrease the chances of getting the data back. You can confirm if it's bad sectors by running a SMART test in the drive.

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