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Could Not Unmount Disk Partition Error

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Reply Alan Siu says: December 5, 2016 at 11:22 am If it successfully unmounts the volumes, the volumes are unmounted and thus should not show up in Finder. Even the Network deployment tools like Apple's Netinstall service or the DeployStudio fails, on account of this error. Thanks Reply John April 7, 2016 MacBook Pro 2011 2.2 GHz Intel Core i7 8GB 1600 MHz DDR3 OSX 10.9.5 I replaced my optical drive with an HDD Caddy This will allow you to fix the problem, regardless of the cause, by one of two means, the first is a sure-thing to fix the issue, while the other only works http://strobelfilms.com/unmount-disk/disk-utility-partition-error-could-not-unmount-disk.html

Select the ‘First Aid' tab and verify the troublesome disk, repairing if needed. Tried again with internal osx drive and still won't recognized 2nd drive. Using this bootable USB device we can boot (or start) a computer and perform data recovery or other tasks. Formatting the hard drive or partition scheme will recreate new HFS file structure on the hard drive, which will be free from cryptic errors.

Disk Utility Couldn't Unmount Disk External Hard Drive

Many thanks. Sever-sort an array Could large but sparsely populated country control its borders? If the internal drive is causing the issue because the OS X Recovery exists as a partition on the physical disk, unable to modify or unmount the internal drive, then the

Reply Adrie says: October 14, 2016 at 10:39 am Great answer. Resolve the Unmount Error with a USB Boot Drive This is the recommended method because it should always fix the error. Sign in to add this to Watch Later Add to Loading playlists... Error 69888 Couldn't Unmount Disk Yes, add me to your mailing list.

I tried booting up off an external osx drive, and now it won't even recognize the disk. Partition Failed With The Error Couldn't Unmount Disk Watch Queue Queue __count__/__total__ Find out whyClose Disk Erase Failed with the error: Couldn't unmount disk - FIX Mac acguevara SubscribeSubscribedUnsubscribe33,67133K Loading... It will ask you to create image of Macintosh HD. http://osxdaily.com/2013/06/14/resolve-a-couldnt-unmount-disk-error-in-disk-utility/ About Press Copyright Creators Advertise Developers +YouTube Terms Privacy Policy & Safety Send feedback Test new features Loading...

Very smooth. Volume Erase Failed Couldn't Open Disk The version of the OS X does not matter, by at least must be 10.7, 10.8 and 10.9. The last command will prompt for password. You should also see the name of the disk such as ‘Macintosh HD'.

Partition Failed With The Error Couldn't Unmount Disk

Reply Ava says: July 8, 2016 at 11:44 am i managed to install el capitan on the external drive and use terminal to force erase the disk.

Open the command line and type the following: diskutil list (press enter to execute the command) You will see something like: 0: GUID_partition_scheme *8.0 GB disk1 Find your disk by size Disk Utility Couldn't Unmount Disk External Hard Drive Advertisement Autoplay When autoplay is enabled, a suggested video will automatically play next. Volume Erase Failed Couldn't Unmount Disk This lists which process is run on the drive?.

SMART info will not be reported on external drives. http://strobelfilms.com/unmount-disk/disk-erase-failed-error-could-not-unmount-disk-lion.html Reply Milton L. Reply Vishal May 19, 2015 @Eugene. Let me know if you have any further issues. Can't Unmount Disk Mac

Loves Crystal Palace FC Share this online Facebook Twitter LinkedIn Reddit Google++ E-Mail+ Responses (11) Crystal M. 5th August 2015 at 3:54 pm · Reply After installing an update, I couldn't This feature has been tested using OS X v10.9.2 which was the latest Mac OS release at the time of writing. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Check This Out Sep 23, 2011 2:07 PM Helpful (0) Reply options Link to this post by Kappy, Kappy Sep 23, 2011 2:13 PM in response to hoosier Level 10 (274,127 points) Desktops Sep

Add to Want to watch this again later? Disk Erase Failed With The Error Couldn't Open Device share|improve this answer answered Oct 6 at 22:42 Thomas Patrick Esch 111 this worked because I was trying to unmount the disk while I was in the disk (dooh). Jan 1st December 2015 at 10:14 pm · Reply For me it worked finally quite simpel, first I unmounted the logical disc "under" the physical disk0, then the erase for disk0

Click on the Erase tab in the DU main window.5.

Reply uzz says: July 21, 2016 at 1:05 pm You don't need any boot drive nor recovery partition utility to fix this error. I searched high and low and your directions were the easiest to follow and actually worked!! Any ideas? At Least One Volume Could Not Be Unmounted First, Download the OS X firmware from the official App Store 2.

Reply Alan Siu says: April 18, 2016 at 1:40 pm That's an odd one. But thank you anyway :) –Peter S Dec 10 '15 at 6:48 @PeterSchmucki can you see the disk at all when you run diskutil? (I have more experience fixing You should now be able to erase the drive. this contact form Why is credit card information not stolen more often?

Attempt again to perform whichever task caused your ‘Couldn’t Unmount Disk' error. (For example to Erase/Partition the disk). Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID then click on the OK button. Thanks in advance. For older Macs running prior versions of OS X, typically anything running OS X 10.6 or earlier will have a SuperDrive, and thus shipped with a bootable DVD that can serve

Target mode gave me the same error that the disc could not be unmounted Sep 23, 2011 4:41 PM Helpful (0) Reply options Link to this post by dmdimon, dmdimon Sep All Rights Reserved. So much easier and clearer than anything else I read. This was the try: $ sudo diskutil eraseDisk JHFS+ DISK_VOLUME disk1 Started erase on disk1 Unmounting disk Error: -69888: Couldn't unmount disk But it didn't work as well.

Click to visit Stellar Partition Manager key registration page Reply Iggy December 2, 2015 I have an EXFAT partition on my 1TB usb hard drive however Stellar Partition Manager