unmountable external hard drive

So is the USB hub powered? I wasn't sure what you were referring to with the cord.

If you use DU to attempt to mount the drive is there an error message

And, have you restarted since this started?

I have no suggestion, a drive failure seems all that is left but ... is there another machine you can plug this drive into?

I have this problem too with my Western Digital 1TB My Passport for Mac.

Downloaded Card Data Recovery - did not work. The software self terminated itself when the problematic WD is connected. Starts up fine when the WD is not connected by USB.

Then I downloaded Remo Recovery. Starts up fine, scans fine and appears to save the files but ALL the files 'saved' are unreadable.

Finally, downloaded Stellar Phoenix in a last ditch attempt to recover my precious video files. Starts fine, saves fine BUT it cannot save files above 200MB because the WD stops working every 10 minutes.So, did not solve my problem totally because I have so many files above 200MB.

And yes, I PAID for all the software above. And the first two software are reluctant to refund me my money until their development team can ascertain whether it's a software bug, over online web conference. And because of the time differences, I can never get online with them. So, all my money gone.

Until one day I opened Activity Monitor and noticed this 'fsck_hfs' starting up everytime I connected the problematic WD My Passport for Mac.

So, tried to Force Quit 'fsck_hfs' and VOILA!

A dialogue box popped up and says that the Passport for Mac cannot be repaired and that I can move and copy files from it but not save to it.

PHEW!!

At least I can access the files and save them to my Seagate 1TB although now I am having a problem opening FCP X project files rescued from the WD.

😠

I have had so very many problems with Western Digital drives over the decades that I no longer even consider buying them: I will buy HGST, etc., drives (owned by WD), but nothing branded with the Western Digital logo.

Just my 2¢...

Clinton

Yes, maybe I should stop buying WDs again.

I have two (1TB and 320GB) and only one is problematic.

Wish I know what's causing the problem exactly.

The error occurred when I was importing videos into FCP X but I suspect that the volume became corrupted because I connected it through a USB hub.

😢

Thank you! I was having similar issues, and it was the same problem with fsck_hfs.

" the hitachi was "stripped" to only run on a mac"

That makes it seem like it was part of an array? Is that true?