Help, my office wants infinite branch merges as policy; what other options do we have? The symptom was that the Mac OS X Disk Utility could see the drive but trying to format it would hang indefinitely at "Unmounting Drive".I formatted the disk with the built The fist step has worked perfectly. Then I could mount and unmount on the Mac OS X Disk Utility. http://gsbook.org/unmount-disk/mac-repairing-disk-failed-with-error-could-not-unmount-disk.php
You might erase this disk but this will lead to loss of data and erase process may end up unexpectedly. Rating is available when the video has been rented. In Terminal I tried: diskutil list /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *251.0 GB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_HFS Macintosh HD 140.0 GB disk0s2 3: Reply Alan Siu says: December 8, 2016 at 12:21 pm Try booting up Ubuntu and reformatting the drive (as FAT32) and then booting into Recovery Mode and re-reformatting it (as HFS+). This Site
King May 23, 2016 I am trying to restore my Mac OS X El Capitan from an external drive to my Mac HD. Couldn't unmount disk, then you may have to force an unmount through the terminal. You should now be able to erase the drive.
Loading... 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) Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Error 69888 Couldn't Unmount Disk Is there a way in Terminal to do this instead?
Do SSDs reduce the usefulness of Databases I'm too cold, turn up the temperature Why is credit card information not stolen more often? Volume Erase Failed Couldn't Unmount Disk 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 The only different thing I needed to do in terminal was to write the commands without the word "sudo". imp source Reply chris says: December 1, 2016 at 3:14 pm I've done this procedure several times, it says it was successful: "Forced unmount of all volumes on disk2 was successful" but it's
MusicTechHelpGuy 15,785 views 4:52 Secret of "dead" external HARD DRIVES! Volume Erase Failed Couldn't Open Disk I foolishly tried to download it on my macbook pro 2012 13″ also. Theoria Apophasis 26,707 views 6:38 Disk erase failed couldn't unmount disk - Duration: 0:44. I wouldn't have installed it on an everyday use (production) machine, but I guess what's done is done.
After this I was able to format the disk in Mac OS X and use the drive for time machine.How my problem started: Hooking up the drive to the WNDR3800 router
Transcript The interactive transcript could not be loaded. Disk Utility Couldn't Unmount Disk External Hard Drive GameObject with Audio File called with FindGameObjectWithTag returns "Object reference not set to an instance of an object" "Shields at 10% one more hit and..." What? Partition Failed With The Error Couldn't Unmount Disk I would suggest copy and paste.
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. Check This Out FOR AN ENTIRE PHYSICAL DISK: 1) Using the Terminal application again, booting from OS X Recovery or an external bootable drive. After the download & installation of Yosemite I wanted to remove Macintosh HD partition but keep music and video files and transfer them to Mac HD2. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Can't Unmount Disk Mac
Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.6. If it does not say "Verified" then the drive is failing or has failed and will need replacing. WhyNotVideo211 46,082 views 4:57 How to Fix a Corrupt Mac Harddrive in 10.8 - Duration: 3:03. http://gsbook.org/unmount-disk/disk-utility-erase-error-could-not-unmount-disk.php Sign in to add this video to a playlist.
Through register software, you can run multiple recover modes such as Deleted File recovery, Formatted Drive recovery, Raw Recovery etc. Disk Erase Failed With The Error Couldn't Open Device Sep 23, 2011 2:26 PM Helpful (0) Reply options Link to this post by hoosier, hoosier Sep 23, 2011 2:28 PM in response to Kappy Level 1 (5 points) iCloud Sep Show more Language: English Content location: United States Restricted Mode: Off History Help Loading...
Thanks Reply Vishal April 8, 2016 If Disk Utility is failing again & again to format the hard drive then you can try formatting with Stellar Partition Manager utility. Press done to continue Reply Vishal October 19, 2016 Hi Sherri, Mac can't write to NTFS formatted hard drive but Stellar Partition Manager can help you format, resize, create, delete or Sign in Transcript Statistics 78,060 views 145 Like this video? At Least One Volume Could Not Be Unmounted Not the answer you're looking for?
See How to Answer on how to provide a quality answer. - From Review –fsb Sep 29 at 13:18 add a comment| Your Answer draft saved draft discarded Sign up Bit more drastic, but you can attempt to force a volume or the entire physical disk to unmount: FOR A VOLUME: 1) Using the Terminal application again, booting from OS X 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). http://gsbook.org/unmount-disk/error-could-not-unmount-disk-disk-utility-mac.php You can not post a blank message.
Still unable to work on the disk? Find the one you want to force unmount. What does the author want to convey by ending his letter with »Tschüssikowsky«? 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.
Tried everything under disk utility, couldn't unmounted disk or said couldn't open disk, depending which disk. Zognoh 806,136 views 3:28 How to Format Micro SD card in El Capitan OS X Mac , how to set up sd card in Mac - Duration: 5:43. Attempt again to perform whichever task caused your ‘Couldn’t Unmount Disk' error. (For example to Erase/Partition the disk). Do you know what might be causing this?
First, Download the OS X firmware from the official App Store 2. Please type your message and try again. hoosier Level 1 (5 points) iCloud Q: Disk Utility cannot unmount disk I am trying to reinstall snow lepord on a macbook Please let me know if this resolves your issue. Sign in to report inappropriate content.
This is a good example of why it's very valuable to have a bootable USB thumb drive set up with whatever version of OS X is running on your Macs, because