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External HDD spontaneously unmounting


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#1 professorchaos

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Posted 04 October 2011 - 04:58 PM

I recently purchased a Toshiba 500 GB external HDD and used it, with PhotoRec on Knoppix (LiveDVD), to backup my failing internal HDD. After sifting through the files for some hours, accessing, deleting files from, or downloading files to the external drive became very slow and such processes would often fail while enacting, giving an I/O error on Linux and a "cannot read source file or disk" error on Windows (7). I was thinking this was due to the stress it had been under, due to the amount of data that had been added and deleted from it in such a short period of time (around 250 GB), coupled with the fact that it's a NTFS volume. However, I'm not sure how to proceed. Surely I don't need to replace the drive already after 2 days?!

Thanks for your assistance

Edit: The model is E05A050BAU2XK

Edited by professorchaos, 04 October 2011 - 05:36 PM.


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#2 professorchaos

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Posted 05 October 2011 - 11:20 AM

I'd like to further clarify that the drive passes all relevant disk tests; chkdsk and testdisk find no problems while the drive is mounted, the problem seems to be that the connection is intermittently lost.

#3 rotor123

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Posted 06 October 2011 - 05:17 PM

Have you tried connecting to a different USB port. I've got one here that has worn out physically and does exactly what you are describing.

If that fails to cure the problem it may be the drive or the cable or....
If a portable drive the USB port may not be providing enough power
or a Problem with the power source if AC powered.

Alternatively the Physical drive may be OK but the connector may be coming loose from the circuit board in the drive.

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