Disc Erasing Error
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a title. You can not post a blank message. Please type your message and try again. studio_ Level 1 (2 points) Q: Disk Erase failed with the error: Couldn't unmount disk. Running Mavericks I am running Mavericks OX 10.9.1 and am trying to erase an external erase compact disc hard drive that has been partioned. I keep coming up with the error message "Disk Erase
Erase Dvd Disc
failed with the error: Couldn't unmount disk." Any suggestions? iMac, OS X Mavericks (10.9.1) Posted on Jan 21, 2014 1:45 PM I have an error occurred erasing the disk this question too Close Q: Disk Erase failed with the error: Couldn't unmount disk. Running Mavericks All replies Helpful answers Page 1 of 4 last Next by Kappy, Kappy Jan 21, 2014 1:48 PM in response to studio_ Level
Createinstallmedia Error Erasing Disk
10 (271,467 points) Desktops Jan 21, 2014 1:48 PM in response to studio_ Eject the drive, wait a minute or two, then reconnect it. Try again. Helpful (3) Reply options Link to this post by studio_, studio_ Jan 21, 2014 2:11 PM in response to Kappy Level 1 (2 points) Jan 21, 2014 2:11 PM in response to Kappy Hey Kappy, thanks for your reply! It was a no go though Helpful (0) Reply options Link to this post disk erase failed with the error by Kappy, Kappy Jan 21, 2014 2:17 PM in response to studio_ Level 10 (271,467 points) Desktops Jan 21, 2014 2:17 PM in response to studio_ There must be something on the drive that has a connection to the internal drive, I think. Try booting from the Recovery HD:Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the arrow button below the icon.Select Disk Utility from the list and click on the Continue button. See if this lets you erase the drive. Helpful (1) Reply options Link to this post by Dr.Mac., Dr.Mac. Jan 21, 2014 2:26 PM in response to studio_ Level 3 (636 points) Jan 21, 2014 2:26 PM in response to studio_ To list all the drives and their accompanying partitions from the Terminal, type the following command: diskutil listThis will give you a listing out the drives, their volume names, the size of the drive and partitions, their partition types, and their identifier location. Paste the disk drives listing into a reply to this message. Helpful (0) Reply options Link to this post by Kappy, Kappy Jan 21, 2014 2:26 PM in respons
a problem, while handling some of the Macs, when they are not allowed to repair permissions or directory in Disk Utility. They are unable to erase or partition the drive.
Disk Erase Failed With The Error Invalid Request
Even the Network deployment tools like Apple's Netinstall service or the DeployStudio fails,
Disk Erase Failed With The Error File System Formatter Failed
on account of this error. The error, which is thrown, is the: ‘Disc erase failed couldn’t unmount disc.' or ‘Disk disk erase failed with the error couldn't open device Erase failed with the error: Couldn’t unmount disk.’ The error occurs in such situations like formatting Mac as well as partitioning and verification and repairing of Mac disk. Causes The reason for this error https://discussions.apple.com/thread/5812340?tstart=0 is the modification of the boot drive, or it is being used by some other process or application. 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 preference must be given to a network drive or an external drive. Solution There are many solutions when the http://www.stellarinfo.com/blog/couldnt-unmount-disk-error-mac/ user faces these problems. Using an external drive or OS X Recovery for the starting up of the Mac from another bootable drive. Disk Utility can be run from the external drive. The version of the OS X does not matter, by at least must be 10.7, 10.8 and 10.9. The one and only requirement are that Disk Utility must reside on the drive. There are three means of resolution of the problem. These are: (1) Fixing with Partition Manager If the OS X is denying you to format, erase and repair the Mac hard drive or a volume due to the Couldn’t Unmount Disk’ Error then use Partition Manager Application to format the hard drive with Mac OS X Extended Journaled file system. Formatting the hard drive or partition scheme will recreate new HFS file structure on the hard drive, which will be free from cryptic errors. Further, the disk manager utility will allow the user to create, resize, add partitions on the hard drive with HFS, FAT or NTFS file systems. (2) Fixing with USB Boot Drive This is the most recommended method to repair the error. Any OS X boot drive is needed to complete the task. But, the important poin
halt whatever the attempted task is right in its tracks. This can happen during partitioning, disk verification and repair, and even during formatting, and there's usually little to no additional information provided as http://osxdaily.com/2013/06/14/resolve-a-couldnt-unmount-disk-error-in-disk-utility/ to how to resolve the problem or even what the problem is. Typically the "Couldn't Unmount Disk" error pops up when the currently boot drive is being modified, thus the easiest solution is to boot from another drive and run Disk Utility from there instead. For the boot drive, it shouldn't matter which version of OS X it's for (assuming 10.7, 10.8, and 10.9 at least), the only requirement is that it disk erase has Disk Utility - which they all do. 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 sometimes. We'll cover both with a bit of explanation. Resolve the Unmount Error with a USB Boot Drive This is the recommended method because it should always fix the error. You will need any disk erase failed OS X boot drive to complete this task, I used a Mavericks boot installer drive for this purpose but others should work too, whether they are installation drives or just recovery drives, the important thing is they are bootable and separate from the primary boot disk that stores the installed OS: Attach the USB boot drive to the Mac and reboot Hold down the OPTION key during boot, then select the attached boot drive (typically has an orange icon at the boot menu) At the boot menu, choose "Disk Utility" (if using an Installer disk, pull down the "Utilities" menu to access Disk Utility) Go to "First Aid" and verify the disk, then repair if needed Now perform the original task that threw the "Couldn't Unmount" error I ran into this twice recently, first when attempting to modify partitions on a drive, which came right along with a separate "partition failed" error, and again was triggered when attempting to format those partitions. The above steps did the trick and everything was working again as expected. 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 without a separate boot drive some of these er