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Disk Utility Could Not Unmount Disk External Hard Drive


in any way. Once you have done this, you can format the entire Volume.I hope this helps someone else, as I struggled with this for a few hours. Any other options? –stef Mar 30 '14 at 13:48 I was trying to avoid this, but it does look like trashing is the option. –Buscar웃 Mar 30 '14 at They are unable to erase or partition the drive. navigate here

Reply Adrie says: October 14, 2016 at 10:39 am Great answer. I want my Mac to be single partitioned again. I tried the other workaround; hdiutil detach, and i get an error saying "Resource busy" please advise Reply Alan Siu says: October 25, 2016 at 8:07 am This should help you http://technology.siprep.org/fix-for-disk-erase-failed-couldnt-unmount-disk/ Reply Bobby says: October 9, 2015 at 5:17 pm Excellent post! https://discussions.apple.com/thread/4117187?start=15&

Force Unmount Mac

Thanks for your post [email protected] Jan 7, 2014 10:54 PM Helpful (10) Reply options Link to this post by larshaeuser, larshaeuser Jan 15, 2014 12:29 AM in response to desbrisay Level The last command will prompt for password. I am running iMac 2011 OS X 10.9. Regards.

Transcript The interactive transcript could not be loaded. Many thanks. This should force unmount the volume: 3) Attempt again to perform whichever task caused your ‘Couldn’t Unmount Disk' error. (For example to Erase/Partition the disk). Disk Erase Failed With The Error Couldn't Open Device I tried this but it still didn't work, it says "unable to unmount 1 or more part" or something like that.

SATA bus (whether on hub, or SATA to USB cable). The above steps did the trick and everything was working again as expected. I tried booting up off an external osx drive, and now it won't even recognize the disk. http://superuser.com/questions/563980/i-want-to-reformat-my-external-hard-disk-but-disk-utility-said-it-could-not-be-u United States Copyright © Apple Inc.

Thank you so much 🙂 Very clear instructions! Volume Erase Failed Couldn't Unmount Disk Open disc utility find my external drive , that will not un mount or partition. Started the mac, and all was well: reformatted and on its way. I usually format my hard disks to clear the documents I no longer need.

Unmount Disk Mac Terminal

Subscribe London:020 8645 5803 Surrey: 0208 660 9999 Manchester: 0161 277 9600 © Amsys Ltd, Registered Office: 44 Poland Street, London, UK, W1F 7LZ Tel: 020 8660 9999 Email: [email protected] Company http://osxdaily.com/2013/06/14/resolve-a-couldnt-unmount-disk-error-in-disk-utility/ Why do you suspect that Windows OS utilities would be open on the OP's Mac? –G-Man Oct 21 '14 at 21:46 1 What is a "disk prep app"? Force Unmount Mac armineprox 343,373 views 4:33 5 useful Terminal Commands for Mac OS X - Duration: 10:04. How To Unmount A Drive Mac I tried formatting/erasing the 2nd HD numerous times with Disk Utility and it would continue adding time to the process up to 22+ hours.

So now yor saying open mac by pressing said key. http://strobelfilms.com/unmount-disk/error-could-not-unmount-disk-external-hard-drive.html 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 Reply marita says: January 26, 2016 at 2:48 pm What to do when the problem happens when i am trying to erase the internal hard drive to sell my pac book To create bootable media and accomplish the task you need to register the software through Stellar Partition Manager Buy Now Page. Could Not Unmount Disk Mac External Hard Drive

You should see some disks appear like /dev/disk0, /dev/disk1, /dev/disk2. 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 Skip navigation Sign inSearch Loading... his comment is here Reply Jeff Alexander says: April 15, 2016 at 3:18 pm I have been trying off and on for weeks to get rid of this error.

Stellar Phoenix Mac data recovery is free-to-preview software that allows preview of deleted, formatted and lost files in demo version. Volume Erase Failed Couldn't Open Disk Reply Vishal August 13, 2015 Hi Owen, Yes Stellar Partition Manager V3.0 will address your issue. For the older Mac OS X like 10.6 or earlier, the opportunity lies in a SuperDrive and a bootable DVD, and this can also offer the same resolution. (3) Fixing With

We'll cover both with a bit of explanation.

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 Required fields are marked *Name Email Website Time limit is exhausted. Keep it unmounted and then erase in Disk Utility. Unmount Disk Windows 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 ran Disk utility repair disk but it gave me back this message ‘Disk Utility can’t repair this disk. It looks as if the failure came from the wiping part. The errors could have been unresolvable without a boot drive. weblink share|improve this answer edited Apr 22 '15 at 20:50 answered Apr 22 '15 at 20:38 Jaans Conifer Reinreb 11 1 Hi Jaans, while this link may answer the question, it

But, the important point to remember is that the installer or the recovery drive must reside in the drive, separate from the primary boot disk with the installed OS on it. PLEASE HELP!! That fixed it for me. 😜 share|improve this answer answered Oct 21 '14 at 21:09 New Mac user 1 I must be missing something ... Finally, you will be able to format your Mac Hd in disk utility I hope the solution will be helpful for you.

Link-only answers can become invalid if the linked page changes. Reply Ian Small says: January 30, 2016 at 2:57 pm Brilliant! Who is this six-armed blonde female character? Reply Tanya February 4, 2016 What is a USN boot drive?

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 It worked the 1st time for me, and i also had to stumble across the interweb minefield before finding this solution. Right now i have the macbook booted on the external on el capitan and I'm going to go through the whole process over again for this computer. Required fields are marked * Prev Post Next Post Subscribe Sign up for news, views and offers and more from our expert team Popular posts Recent PostsMost CommentedMost ViewedOpenSSH updates in

Back up as many of your files as possible, reformat the disk, and restore your backed-up files' I unsure of my disk right now and need some solution asap. However, this is not applicable for the modification of the boot disk with the help of partitions or formatting. Worked like a charm for me to reformat an external drive. 100x easier than the other ways I read to solve the unmount issue, like boot disks, etc. Loading...

Is ATC communication subject to FCC profanity regulations? Tried everything under disk utility, couldn't unmounted disk or said couldn't open disk, depending which disk. I've never seen that.