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Could Not Unmount Disk Mac External

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Took a lot of time to find it but was a flawless solution. The error, which is thrown, is the: ‘Disc erase failed couldn’t unmount disc.' or ‘Disk Erase failed with the error: Couldn’t unmount disk.’ The error occurs in such situations like formatting Jun 10, 2014 9:22 PM Helpful (4) Reply options Link to this post by sidste, sidste Jul 5, 2014 3:11 PM in response to Victoria Herring Level 1 (0 points) Jul Daniel Redfern 9,864 views 3:28  Fix: "Disk Erase Failed With The Error: Invalid Request" - Duration: 4:57. have a peek here

ends in 3 days Linked 67 The volume can't be ejected because it's currently in use Related 10How do I not accidentally eject external drives?1External hard drive frequently ejects itself when Same goes when I try to erase the disk. Used diskmaker x to make an el capital boot disk then followed your steps and it worked on my 2013 MacBook Pro with Yosemite version. Why so? https://discussions.apple.com/thread/4117187?start=15&

Force Unmount Mac

But... "to force eject [with the usual caveats on force-ejecting...]" This is worrying. There are just no dots or asterisks to indicate so. Tried again with internal osx drive and still won't recognized 2nd drive. Reply vishal May 25, 2016 Hi Dina, You can use Stellar Partition Manager Software to format the hard-drive of your Mac OS X extended Journaled file system.

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. The only different thing I needed to do in terminal was to write the commands without the word "sudo". armineprox 343,373 views 4:33 Reset Mac to Factory State and Delete Personal Data Securely - Duration: 2:57. Can't Unmount Disk Mac I made a copy of these files on my notebook, then dragged these files from the external hard drive to the trash.

If yes, then go to OS X utilities and format the entire hard disk drive. Uncheck use extension "txt" ... Working... http://www.stellarinfo.com/blog/couldnt-unmount-disk-error-mac/ You can create, delete, format and rename EXFAT drives however the software does supports resizing of HFS, FAT and NTFS formatted hard disk drives.

In that case, you'll need to boot from a separate USB drive to fix the error. Partition Failed With The Error Couldn't Unmount Disk Many thanks. Is ATC communication subject to FCC profanity regulations? Sign in Share More Report Need to report the video?

Unmount Disk Mac Terminal

So much easier and clearer than anything else I read. Be sure you backup your files to an external drive or second internal drive, the following procedure will remove everything from the hard drive! Force Unmount Mac After changing the security options and trying to format, it finally said there were errors on the disk. How To Unmount A Drive Mac Let me know if you have any further issues.

Many-2 thanks for such a valuable blog post. navigate here Enter the following where ‘x' is your disk identifier. (Remember to use the ‘diskutil list' command if you need to find out your disk identifiers): sudo diskutil unmount force /dev/diskx 2) Sometimes things don't go so smoothly but it can be a simple oversight sometimes as well. Run a command similar to this one sudo diskutil unmountDisk force /dev/disk2 If you're prompted for a password, enter it (yes, your account does need to have administrative privileges). Couldn't Unmount Disk Mac

to disable scanning that drive permanently, use -d (sudo mdutil -d "/Volumes/Name_of_Drive"). Enter the following where ‘MacintoshHD' is the name of the newly created Mac formatted partition, and where ‘x' is your disk identifier, (remember to use the ‘diskutil list' command if you share|improve this answer answered Dec 19 '14 at 15:06 Tim Undheim 311 Did you read the comments in Tetsujin's answer? Check This Out Reply Adrie says: October 14, 2016 at 10:39 am Great answer.

Then the resolution lies in the previous method. Error 69888 Couldn't Unmount Disk I would suggest copy and paste. Jan 24, 2014 11:21 AM Helpful (0) Reply options Link to this post by klmfvej , klmfvej Feb 2, 2014 8:17 PM in response to alex.zatman Level 1 (0 points) Feb

If I agreed to taking the risk of corrupting the disk, I would simply unplug it. –Nicolas Barbulesco Aug 19 '14 at 16:11 Then set the no spotlight flag

This should force unmount the entire physical disk and all its related volumes: 3) Attempt again to perform whichever task caused your ‘Couldn’t Unmount Disk' error. (For example to Erase/Partition the SystemUIServer also was keeping Time Machine backups from running, even after I restarted my machine. Operation failed… Reply Alan Siu says: August 17, 2016 at 12:59 pm Based on the output you posted, your disk might have unmounted just fine. Volume Erase Failed Couldn't Open Disk MacRumors attracts a broad audience of both consumers and professionals interested in the latest technologies and products.

Reply Vishal May 28, 2015 We recommend you try recovering your deleted files with a professional software and not with any free recovery apps. Please type your message and try again.            Victoria Herring Level 2 (301 points) Desktops Q: Using Disk Utility to Erase Disk-won't unmount I have a MacPro and 4 drives I foolishly tried to download it on my macbook pro 2012 13″ also. this contact form Feb 2, 2014 8:17 PM Helpful (0) Reply options Link to this post by ryanzamarripa, ryanzamarripa Mar 29, 2014 10:17 AM in response to Victoria Herring Level 1 (0 points) Mar

Yes, my password is: Forgot your password? asked 3 years ago viewed 18859 times active 11 months ago Visit Chat Related 1Input/output error using Mac Disk Utility?1What does input/output error mean with Disk Utility1Warning while using Disk Utility In the latter case, you are physically removing power from the device in a sudden way, which, as one imagines, can cause damage to a magnetic disk rotating at several K If the external El Capitan absolutely refuses to unmount the disk, can you try booting into Recovery Mode (hold down Cmd-R while booting up) and then using Disk Utility there?

Show more Language: English Content location: United States Restricted Mode: Off History Help Loading... You can resize the partition to take all the available free spaces on the Mac hard disk drive. Here is what finally worked - I connected the external drive to a PC and did a quick reformat, then plugged it back into my mac and was finally able to Reply Vishal November 11, 2016 If you are unable to boot your system from the other disk, please go through the below solution: 1.

Having struggled with Couldn't Unmount Disk for hours, I re-started my mac with cmd+r, opened terminal and unmounted disk. Reply Lauri says: August 17, 2016 at 12:56 pm I had hoped…. 🙁 Didn't work for me - I've been trying anything and everything to get my external to show back ApertureAlley 72,177 views 3:03 How to Erase or Partition a Drive in Mac OSX - Duration: 6:50. But this did not work. –Nicolas Barbulesco Dec 23 '14 at 15:09 1 Sorry to hear about that.

Help, my office wants infinite branch merges as policy; what other options do we have? Such boot drives are easy to create on your own, here are instructions for making boot disks for OS X 10.9, OS X 10.8, and OS X 10.7. An external drive or a network drive is preferred if it is the internal hard drive you have an issue with, since the OS X Recovery is a partition on the Firstly you need to create a boot media using Stellar Partition Manager software.

Reply Ava says: July 8, 2016 at 8:13 am I was trying to install tacos sierra on my 2011 iMac 21.5″ and it crashed my computer, and it just kept restarting. Came across this and bingo, worked in seconds. Now, press the opt n reboot your system 6. Free recovery apps aren't reliable and won't give you the desired recovery results.