You can read the following blog post on HFS drive corruption. You can try booting from OS X Recovery (by holding ‘CMD' + ‘R' keys at startup) or an external drive and use the command line to attempt to unmount or erase Formatting the HD will have recreated the new file structure on your hard drive and ‘Couldn't unmounts disk’ will also resolve. Regards Vishal Reply Jacob May 26, 2015 Suggest me some free data recovery apps. have a peek at these guys
Please reload CAPTCHA. Shortest auto-destructive loop Why do manufacturers detune engines? 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+). Reply Owen August 12, 2015 I was installing windows 7 on my Mac through boot camp when Disk Utility showed me a pop-up which says “Unrecognized file system”. his comment is here
You can then run Disk Utility from there. If you have used our method above to create a bootable installer, choose ‘Disk Utility' from the available menu. Reply Vishal May 28, 2015 We recommend you try recovering your deleted files with a professional software and not with any free recovery apps. I searched high and low and your directions were the easiest to follow and actually worked!!
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? Some of the following steps are destructive and will lose ALL data on your drive. Spent hours searching. Error 69888 Couldn't Unmount 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
Follow his post to know more about data recovery and Mac backups. Purchased new HD and it initially recognized disk when formatting. Working... http://www.stellarinfo.com/blog/couldnt-unmount-disk-error-mac/ Add to Want to watch this again later?
At this point I'm not sure what else to try. Disk Erase Failed With The Error Couldn't Open Device 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). Sign in 264 Loading... Note down the disk identifier.
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 http://www.amsys.co.uk/2014/05/disk-utility-tip-fix-couldnt-unmount-disk-errors/ Regards Timothy Reply Vishal May 21, 2015 Hey Timothy, Thanks for writing to us. Partition Failed Couldn't Unmount Disk Mac Validate Random Die Tippers Does gunlugger AP ammo affects all armor? Can't Unmount Disk Mac It if truth be told was once a enjoyment account it.
The last command will prompt for password. More about the author Loading... Transcript The interactive transcript could not be loaded. Reply Vishal November 11, 2016 If you are unable to boot your system from the other disk, please go through the below solution: 1. Volume Erase Failed Couldn't Open Disk
I've never seen that. Ignatius College Prep Tech Blog - trademarkable on How to read from and write to .plist files using PythonAlan Siu on Fix for disk erase failed couldn't unmount diskPages About this Enter your admin password if prompted. check my blog JonoKimonoDoesTech 18,007 views 2:57 How To Factory/Hard Reset ANY Macbook To Original Settings WITHOUT Installation Disk! 2016 METHOD! - Duration: 4:02.
Loading... Force Unmount Mac share|improve this answer edited Oct 10 '12 at 15:31 CajunLuke 14.1k53963 answered Oct 10 '12 at 15:03 Michael 1 1 I've had cases where I get this error even when acguevara 11,277 views 2:22 Disk utility repair disk error - Duration: 7:11. 121macfreak 76,199 views 7:11 Partition failed with error | How to unlock Password Protected Hard Drive | HD busy
If that doesn't work, I'd actually seriously consider booting Ubuntu or some other non–Mac OS X operating system to reformat the drive that way first, and then use Disk Utility to 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 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. Partition Failed Couldn't Unmount Disk External Hard Drive In that case, you'll need to boot from a separate USB drive to fix the error.
five + 6 = Notify me of followup comments via e-mail. Thank you so much. Sign in to make your opinion count. news when I have a partitition I can't set up boot camp which is really annoying ..
How can I turn rolled oats into flour without a food processor? Thanks. If you have an external bootable disk, connect this to your Mac and power your Mac up whilst holding down the OPTION/ALT key. I tried booting up off an external osx drive, and now it won't even recognize the disk.
Reply Alan Siu says: June 26, 2016 at 8:06 am The only thing I can think of is that you're accidentally typing it wrong. With Boot Drive we mean that Operating system of a computer is burned (written) to a USB drive which makes it bootable. This feature is not available right now. Reply Leave a Reply Cancel reply Your email address will not be published.
Please try again later. Hope this helps.