Error Erasing Disk
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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 error occurred erasing the disk an external hard drive that has been partioned. I keep coming up with the error message error erasing disk error number (-69888 0) "Disk Erase 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 createinstallmedia a error occurred erasing the disk I have 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
Disk Erase Failed With The Error
to studio_ Level 10 (271,524 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) disk erase failed with the error invalid request Reply options Link to this post by Kappy, Kappy Jan 21, 2014 2:17 PM in response to studio_ Level 10 (271,524 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
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. Even the Network deployment tools disk erase failed with the error file system formatter failed like Apple's Netinstall service or the DeployStudio fails, on account of this error. The error,
Disk Erase Failed With The Error Couldn't Open Device
which is thrown, is the: ‘Disc erase failed couldn’t unmount disc.' or ‘Disk Erase failed with the error: Couldn’t unmount disk.’ The
Disk Erase Failed With The Error Invalid Request Exfat
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 is the modification of the boot drive, or it is being used https://discussions.apple.com/thread/5812340?tstart=0 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 user faces these problems. Using an external drive or OS X Recovery for the starting up of http://www.stellarinfo.com/blog/couldnt-unmount-disk-error-mac/ 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 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. The following steps can do the fixing: T
to Disk erase failed. Couldn't unmount disk, then you may have to force an unmount http://technology.siprep.org/fix-for-disk-erase-failed-couldnt-unmount-disk/ through the terminal. Launch up Terminal.app (through /Applications/Utilities or through a Spotlight search). Then paste in the command: diskutil list to list out the different disks. You should http://www.redmondpie.com/how-to-create-os-x-yosemite-bootable-usb-flash-drive-tutorial/ see some disks appear like /dev/disk0, /dev/disk1, /dev/disk2. Find the one you want to force unmount. For this example, let's say it's /dev/disk2. Run a command similar to this disk erase 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). You should not physically unplug the drive. You should now be able to erase the drive. Author Alan SiuPosted on April 13, 2015Tags disk utility, diskutil, erase drive, mac, unmount 30 thoughts on “Fix for disk erase failed disk erase failed couldn't unmount disk” Randall says: July 14, 2015 at 9:12 am This worked perfectly for me! After searching for a very long time through forums of people suggesting basic things or trying to make others feel ignorant this solution worked! Thank you so much. I now have a useable disk where before it would not mount and could not be formatted or erased. Running OS X 10.9.5. I will be linking this solution to other forums in the future. http://technology.siprep.org/fix-for-disk-erase-failed-couldnt-unmount-disk/ Reply Bobby says: October 9, 2015 at 5:17 pm Excellent post! It worked the 1st time for me, and i also had to stumble across the interweb minefield before finding this solution. Thank you ! -Bobby Reply Lissett says: October 11, 2015 at 10:19 am Worked for me as well! Thank you so much 🙂 Very clear instructions! Reply Jason says: November 5, 2015 at 8:50 am I tried this method, but now it says "Forced unmount of disk2 failed: at least one volume could not be unmount
OS X Apple Watch Google Google Services Android Reviews Wearables Web IoT Home Automation Developer Tools Deals More Apps Sprink Turn Off LCD Drive Icon Changer About Us Advertise RPon How To Create OS X Yosemite Bootable USB Flash Drive [Tutorial] By Zayed Rehman | October 17th, 2014 As you may already know by now, OS X Yosemite is out, and is a free upgrade. So if you’re coming from previous version of OS X, you can download OS X Yosemite from the Mac App Store free of charge to upgrade your machine. However, if you wish for a complete clean install of OS X’s latest on your Mac, the best way to go about this is to create a bootable USB drive of Yosemite. In this guide we will show you how to do just that. The older method used to make bootable drives of OS X Lion and Mountain Lion installer did not work for OS X Mavericks. Same is the case with OS X Yosemite, which follows similar installation pattern to OS X Mavericks. Requirements: A Mac with ‘Install OS X Yosemite.app’ file downloaded from Mac App Store. A USB flash drive with at least 8GB storage capacity. How To Make OS X Yosemite Bootable USB Flash Drive: Step 1: First up, you will need to format the USB drive. To do this, start ‘Disk Utility’, select the flash drive from the left sidebar, select ‘Erase’ tab from right, and make sure the name is set to ‘Untitled’, format is set as ‘Mac OS Extended (Journaled)’. Now, click on ‘Erase…’ button, as shown in the screenshot below. Step 2: Next, select ‘Partition’ tab. Select ‘1 Partition’ from ‘Partition Layout’ dropdown menu. Click on ‘Options’ and make sure ‘GUID Partition Table’ is selected as partition scheme. Also make sure the name is set to ‘Untitled’, not ‘Untitled 1’ or anything else. Once done, click on Apply to create this partition. Step 3: Download OS X 10.10 Yosemite from Mac App Store. Once downloaded, quit the installer and make sure t