Unmountable external hard drive

I have a Hitachi 1TB external drive that suddenly is unmountable - disk utility says that it's fine, repair disk says it's fine, but it won't mount - any ideas? The files are extremely important (aren't they always???) and I really need to get it fixed! Would greatly appreciate your ideas/help!

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.
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.

Similar Messages

  • Unmounted External Hard Drive, Error: Filesystem verify or repair failed

    Earlier today, I disconnected the external hard drive while it was working.
    Now, the External Hard Drive won't even show up on my computer. However, on the Disk Utility it does. I have tried to verify & repair the disk. Plus click the mount button nothing work.
    Whenever, I ran the system verify or the repair. I got this error: Error: Filesystem verify or repair failed
    Ok. So I have searched all over the internet and forums. Tried everything. Nothing works.
    I even tried Disk Warrior. It would work for a while, then when it came to step 8. It would make my computer go black and hold down the power button to restart.
    Any suggestions? Please let me know, I would like to recover the files if I can. Thanks.
    P.S.Yes I have tried to restart multiple time. I have tried with my USB 2.0, firewire 400, & 800 too.. Nothing.Everyone except the USB shows up in the disk utility but doesn't mount.

    I have had the exact same situation occur, but was able to follow these steps to successfully save everything!!
    The Unix program "dd" will instruct a drive to stream out all of it's data from beginning to end without regard to file structure, therefore creating an exact block-for-block duplicate. By doing this, it will allow you to copy everything off without having to mount the drive. It also ignores any corruption or physically damaged blocks on the drive which would otherwise crash or freeze the Finder. It saves the data to a disk image file which you can then open and use without fear of imminent failure (the format of the disk image will be the same as the original drive). Now that the data is preserved, you can safely go through and recover your files. Keep in mind that if a file was damaged or corrupted on the drive, it will be unusable, but at least you'll be able to get to the good ones safely. In my case, using "dd", I had no problems and got every file off. If it doesn't work for you, at least it's impossible for just trying it to further damage your files. I can recommend a few other remedies if this doesn't work for you.
    Note: The computer must be able to at least recognize the drive. That means either 1) It mounts 2) When you connect the drive the Finder asks if you want to erase or ignore, click ignore and you should be able to do this, or 3) Nothing happens in the Finder, but the volume in question does appear in Disk Utility. If you connect the drive and absolutely nothing happens and it never shows up in Disk Utility, it won't work.
    Note: As always, it is suggested that you backup important data on your startup disk before proceeding with stuff like this. It is possible to wipe a drive by mistyping a terminal command, so double check before you hit enter.
    _Now, on with the show!_
    Prep: Restart your machine so that it goes straight to the login window. Enter your user name and password. As soon as you press enter after your password, immediately hold down the shift key until the Finder finishes loading (this prevents any background startup items from running that might interfere).
    1. Attach the drive to the computer and make sure you have another drive with enough free space to hold the entire capacity of the bad drive, not just it's used space, but the WHOLE size of the bad drive (for exception, see very bottom of this post).
    2. In Terminal, type:
    +diskutil list+
    Look for the drive you want to recover in the "name" column, then write down it's "identifier" (ex. disk1s2)
    3. In Terminal, type:
    +dd bs=512 if=/dev/disk#s# of=/my_directory/image.dmg conv=noerror,sync+
    !! Replace "disk#s#" with the identifier you wrote down before !!
    !! Replace "/my_directory/" with the path to where you want to save !!
    !! Replace "image.dmg" with the name you want to give the disk image (must end with .dmg) !!
    4. To confirm that something is happening, open Activity Monitor (in the Utilities folder) and click "Disk Activity". Once you determine an average transfer rate, divide the size of the drive by that and then divide by 60 to see how many minutes it will take to finish. *+! ! FOR LARGE DRIVES THIS WILL TAKE A VERY LONG TIME ! !+* To be safe, do not use your computer for anything until the process finishes, you can leave Activity Monitor open so you can see when it's finished.
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  • Ntfs external hard drives and fat32 4gb flash drive not able to unmount

    Hi everyone,
         I have a bit of a headache here. I have two external hard drives, one is 1TB and the other is 500GB, both are NTFS format. I am using them on my macbook pro at this point because my windows 7 desktop appears to have crashed (still looking into the problem, just haven't had the time). I also have a 4GB flash drive that is fat32 format from that same windows desktop but I only use it for loading music on and putting it in the usb port of my stereo in my car. My problem at this point is that I am no longer able to unmount any of these by using disk utility. I was also having problems with both my external drives being read only until I came across Paragon ntfs for mac. That still messes up every now and then somehow and my drives go back to read only until I disable it and reboot, re-enable it and reboot again. Is there something that I am missing? I have been scouring the internet for last day or so trying anything and everthing to be able to get my ability to unmount disks back and nothing seems to work... Can anyone help?

    Following is the System Requirements from Western digital’s website.
    Available USB port
    Windows 2000/XP/Vista®
    My Passport Essential 320GB USB 2.0 Hard Drives(WDMEB3200)
    Yes, generally speaking, if an external drive or flash drive can be recognized by Windows XP, it should work in Windows Server 2003. However, there is no guarantee.
    If possible, I recommend that you plug the “unrecognized” drive to some other Windows Server 2003 computers to test whether it works. If the issue continues, I suggest that you contact the vendor or the drive for more details.
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    Best Regards,
    Vincent Hu

  • In disk utility, it shows that my external hard drive is somehow unmounted and I can't access it in finder or repair it in Disk Utility. How can I get this working without losing my important data?

    In disk utility, it shows that my external hard drive is somehow unmounted and I can't access it in finder or repair it in Disk Utility. How can I get this working without losing my important data?
    Thank you!

    When you erased the disk did you select Mac OS Extended Journaled as the format option?

  • Can't unmount my External Hard Drive?

    Hi guys,
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    Last week, Time Machine's backup failed, with the message "Unable to complete backup. An error occurred while creating the backup folder."
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    The drive is still visible in Finder and I can still access its contents.
    I've also tried using a new power cable for the drive and I'm having the same results.
    Any advice would be great!

    Hi elliswicks,
    Please follow this step before atempting Joe Gramm's "boot into recovery" method.
    1) Keep your external hard drive plugged in.
    2) Restart your computer.
    3) Go to Disk Utility and eject the drive.
    You should have no problems carrying out Step 3. If this fails, you'll have to rely on Joe Gramm's advanced method.
    Hope you (and anybody else) have benefited from this simpler method! Don't forget to like or put "This solved my question" or "This helped me"!
    Good luck!
    from Galaxy User

  • External hard drive won't unmount for disk utility.

    Im not sure if this is the right topic area but I have a white macbook and my external hard drive won't unmount. I want to erase it via disk utility but it keeps telling me other programs are using it.

    Drive Preparation
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  • My WD 2tb external hard drive will not unmount from my MacBook Pro.

    My WD 2tb external hard drive will not unmount from my MacBook Pro. It no longer even shows up in finder, however it does show up in Disk Utility. I have tired so many of the suggestions on the internet all to a fail.
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    Have you trie using another USB port? Can you test the USB ports with other USB devices to assure they are working? You may want to reinstall OS X in case there has been a driver glitch.
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    Download and install Mac OS X 10.6.8 Update Combo v1.1.

  • External hard drives get improperly unmounted

    I recently upgraded to Mavericks (clean install) on my mid 2011 MacMini.  I have an external hard drive connected via USB3 to eSATA cable.  I leave the computer on around the clock as iTunes serves my AppleTV with it's music and videos.
    I've repeatedly come back to my computer to find a message stating that my hard drive had been "improperly unmounted" and when I plug the drive back in it won't mount.  Disk Utility reports that there are invalid b-tree nodes and the disc can't be repaired.  I manage to get the disc fixed using DiskWarrior 4.4 (version 4.1.1 couldn't fix it).
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    Hello Ari,
    USB3 is prone to interference from Wifi & Blutooth for one thing.
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    Can happen on earler one's also, but...
    See if it's related to this...
    The 2012 macs (and later apparently) not waking normally from sleep after hours being in sleep. (noted here ...
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    The sleepimage file still reappears even if never slept. Delete it (hibernate off, etc) - within minutes its back.
    A note on that here - http://www.xlr8yourmac.com/feedback/Chameleon_SSD_Optimizer.html
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    Try this: "sudo pmset autopoweroff 0" and "sudo pmset standby 0"

  • External Hard Drive Unmounts

    I posted this in the G5 discussion also.
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    Not having a lot of luck with that Mac.
    Have a red of this White Paper, point 3 in particular:
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  • External Hard Drive unmount itself

    After a I think it was a sucessfull migration to OS X Mountain Lion, My two external hard drives and my card reader unmount itself after 30 second of be connected, every device has the same behavior, any clues to solve this issue?
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  • Why does my external hard drive unmount?

    I am having the new problem with my Seagate Free Agent Fire Wire external hard drive. (my other external hard drive is uneffected). The drive is is connected to my 2009 Mac ProQuad Core via FW800 port. It started happening consistnatly about 1 week ago. After the Mac Pro has been asleep, when I wake it I  get the "device disconnected improperly" message. If I unplug and replug the FW connection in back of the drive it is recognized again. I have my iTune music on this drive.
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    Big Rocco wrote:
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  • External Hard Drive Unmounts itself

    I have a WD 500Gb external hard drive which I use solely for Time machine. The other day for no reason I got the error message that the drive had not been properly ejected. Since then the Mac does not recognise that the hard drive is attached. I have tried using the Disk Utility to repair permissions and repair disk but this has had no effect. There is some crucial information in Time Machine that I need to recover. Does anyone know how I can get this drive back please.

    Hello Jennsy:
    Welcome to Apple discussions.
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  • External hard drive error / disk utility not repairing

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    Oh, I forgot to attach image....
    Message was edited by: TheSpoon

  • External hard drive not recognized after time machine locked up

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    KTM450rider wrote:
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    Time machine only ever backed up the first time it runs immediately after I start up my computer after it has been shut off.  All other back up attemps fail.  Recently it stopped recognizing the icon for my external hard drive in the time machine dialog window where you select the hard drive to back up to, and turn on and off the time machine function.  Now the external HD icon only shows up on the desk top but no longer in the dialog box. I just tried shutting the computer off and turning it on again and now the light is on, on the external hard drive but the icon does not even appear on the desk top.
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    What Mac OSX version are your running ("iOS" as shown in your profile cannot run on a Mac computer)?

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