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Running first aid on an external disk results i...

I am working in OS Sierra and recently tried to open a .tar archive file I had on an external hard drive. It stated that there was an input output error and so immediately I suspected there may have been corruption in the drive because I had received an error while tried to create a .tar file earlier.

I ran disk utility on the external hard drive, then it stated that "First aid found corruption that needs to be repaired. To repair the startup volume, run First Aid from Recovery."

I went into recovery mode by pressing command R on startup, and tried to run First Aid again on the disk, but got the same message. Digging deeper, it states:

"Problems were found with the partition map which might prevent booting"

It seems that I cannot repair the disk and get the same message even after going into the Recovery Tools on startup. What can I do here? Here is a picture I get both in Sierra's disk utility and on Recovery Tools on startup.

It's not a problem unless you intend to boot from that volume. Even then it still might not be a problem.

Fixing the partition map will require erasing it. However...

It stated that there was an input output error and so immediately I suspected there may have been corruption in the drive because I had received an error while tried to create a .tar file earlier.

That's correct. I/O errors indicate that disk should no longer be considered reliable. You can erase the disk but those errors will become more frequent until it's essentially unusable. That is probably the reason the partition map became corrupted in the first place.

最後更新：2017-08-26 10:18:24

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