This Disk Could Not Be Mounted

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This Disk Could Not Be Mounted

Hello, i've looked throughout the message boards but I wasn't able to find anything that would help with my problem. I have a Lacie hardrive plugged in to my Macbook Pro. It's a 1.5TB hardrive with 2 partitions, and the other day it crashed. Nothing is working with it. Only the NTFS partition is showing up on my desktop, and all the files are corrupted. I'm unable to eject the disk - it always forces me to do a Forced Eject. I open up Disk Utility and I can see both partitions.

The greyed out partition is not mounted. The Fat32 partition is unable to unmount, and therefore I am unable to do anything with the hardrive. It doesn't let me erase or partition the hardrive. I have no idea what to do so I was hoping someone on here could help me. I tried doing things like disable spotlight but it just gives me an error. It would be nice to recover the files but I doubt that will happen, and I just need to get the drive working again. Any help is much appreciated.

MacBook Pro, Mac OS X (10.7.2)

Posted on Jan 10, 2012 5:41 PM

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Answer 1

Niel

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Jan 10, 2012 5:51 PM in response to fitch88

Use the Repair Disk option. If that doesn't work, erase the partition.

(63088)

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Answer 2

fitch88 Author

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Jan 10, 2012 5:58 PM in response to Niel

Neither of those options work.

Since one won't mount and the other won't unmount i'm unable to erase the hardrive..

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Answer 3

Niel

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Jan 10, 2012 6:02 PM in response to fitch88

Erase the first partition. Don't bother attempting to do anything with the second.

(63090)

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Answer 4

fitch88 Author

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Jan 10, 2012 6:07 PM in response to Niel

Volume Erase Failed

Volume Erase failed with the error:

POSIX reports: The operation couldn’t be completed. Resource busy

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Answer 5

fitch88 Author

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Jan 10, 2012 6:29 PM in response to fitch88

I've done the obvious solutions and they didn't work which is why I am on here. Does anyone have an idea on how to figure out the problem?

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Answer 6

fitch88 Author

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Jan 15, 2012 1:32 PM in response to Niel

Still waiting on an answer

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Answer 7

Apr 3, 2012 10:05 AM in response to fitch88

Its been pretty frustrating for me as well, on both Freecom and WD drives, any way, here is how I fixed it, or fix it because it happens a lot and there is nothing wrong with the drives. In my case, the drive was removed without being ejected for various reasons I won't go into, I am a DJ and use my hard drive in clubs, and I noticed if the drive wasn't ejected it would not remount and show grey in Disk Util, how I get it back, well,

1 I run Disk Uti on my boot hard drive repairing permissions

2 un mount the problematic drive

3 restart the computer

4 remount the problem drive

5 run Disk UTI and repair problem disk ( u still get the error, but run it anyway)

6 unmount disk again and remove USB

7 re insert USB, and it should remount with now problems

This has happened to me a lot and on various drives, and everytime this is what I have done and it works, hope it helps

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Answer 8

alexpole

Level 1

4 points

Nov 12, 2015 8:22 AM in response to fitch88

I had a similar problem with my 1TB Seagate drive with two 500GB partitions: exFAT and OS X Entended. The OS X partition mounted OK while the other (exFAT) did not show up.

What I did is I connected my drive to a Windows computer that immediately recognized the exFAT disk and prompted to fix errors on it. Using scandisk I repaired errors on the disk, then plugged to my Mac and voila - both partitions were now mounted.

Then I just used FirstAid on Disk Utility on the exFAT partition (had to do it twice because first time it failed to fix) and now my disk mounts and unmounts with no problems.

I suspect it happened because I occasionally unplugged the disk without unmounting.

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