It’s important to understand that this is not a problem with the hard drive, which is fine, just some of the data that is on it. This will cause Finder to crash when reading this incomplete data. There’s a high chance that the hard drive was in the middle of a write operation when this happened and therefore not all the data was written to the hard drive that should have been.
In the first scenario (‘a’ above) the data on the drive will have been corrupted when the person shoved past you, disconnecting your hard drive and causing it to unmount. This is a fine example of one of two different scenarios, both with the same symptoms, either of which could be responsible for your problem.
(b) Bad sectors have developed on parts of the drive, causing Finder to crash when they are encountered. (a) Some of the data on the drive has corrupted which is causing Finder to crash or. If there’s anything you think I can do to recover the data, for example to another drive could you advise as I arrive back in London tomorrow and would love to get this sorted if possible.įrom how you describe the problem it sounds like either In disk utility it now shows the disk as mounted and the parent disk it’s self is still showing as healthy and OK after first aid (as well as on other disk utilities I’ve used) but now although Disk Utility is showing the contents of the drive correctly (breakdown of file types) it now says it can’t perform First Aid and continues to crash finder.īeing no expert this suggests there is a problem with the way finder is trying to read whats on the disk and it’s make up rather than the disk itself as I hear no musical noises or clicking, there is also no over heating or anything to suggest the disc isn’t running as normal (as I can mount it also) So the drive mounts, it’s on my desktop, and also shows in Disk Utility but anytime I open the drive from anywhere in the finder window it crashes finder. However later upon going to use the drive again I’ve noticed that it now just crashes finder. When finished I ejected the drive as normal. I plugged it straight back in and it worked, well at least the directory I was using was working and to be safe I ran Disk Utilities (the new version in El Capitan) First Aid and both came back OK. 
Yesterday during a meeting here in Paris at a coffee shop, someone shoved past me and disconnected my drive from the USB cable meaning the drive unmounted. (although now I’m going to take the plunge and back up twice on line instead!!) Usually when at home I back up the back up once a week but being away means this hasn’t been happening. I’m currently travelling and have a 1TB Seagate travel hard drive with me.
#How to fix bad sectors on wd external hard drive mac mac#
In this week’s Help and Advice post we take a look at an external Mac hard drive that suffered a knock.
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