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Disk Utility Erase Error Could Not Unmount Disk

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The errors could have been unresolvable without a boot drive. Please type your message and try again.            studio_ Level 1 (2 points) Q: Disk Erase failed with the error: Couldn't unmount disk. You may have to still change the number (it may not be /dev/disk2 but /dev/disk3 or something else), but most terminal "command not found" errors I've seen have been due to In my example below, the disk name is ‘Server'. have a peek here

Can it be any usb? Daniel Redfern 9.864 görüntüleme 3:28  Fix: "Disk Erase Failed With The Error: Invalid Request" - Süre: 4:57. Enter your email address below: Related articles: Dual Boot OS X 10.9 Mavericks and OS X 10.8How to Resolve a "Partition Failed" Error in Mac OS XHow to Verify (& Repair) However, this is not applicable for the modification of the boot disk with the help of partitions or formatting. http://www.amsys.co.uk/2014/05/disk-utility-tip-fix-couldnt-unmount-disk-errors/

Volume Erase Failed With The Error Couldn't Unmount Disk

NOTE: Use of the ‘sudo' command may not be necessary for some of these actions, however, as long as you know the administrator account's password, starting any unix command with ‘sudo' more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science Welcome to Mac-Forums! Reply Audrey Hain November 10, 2016 Hi, I am a MacBook Pro user, and I am unable to boot my Mac system from other disk.

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. There are three means of resolution of the problem. Stellar Partition Manager doesn't resize EXFAT partitions. Erase Process Has Failed. Press Done To Continue I was able to eject the external HD, but after waiting a few minutes and reconnecting it, I was still not able to erase the external hard drive.I also tried to

bala 27th August 2015 at 10:48 pm · Reply Awesome. Volume Erase Failed Couldn't Open Disk 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 has Disk Utility - 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

Bu özellik şu anda kullanılamıyor.

Reply Sam November 19, 2015 Hi Vishal, To resize my Mac startup disk, I am searching for the Stellar Partition Manager Registration key but unable to find any suitable Couldn't Unmount Disk External Hard Drive 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 Try our newsletter Sign up for our newsletter and get our top new questions delivered to your inbox (see an example). It is a Seagate 1TB drive.

Volume Erase Failed Couldn't Open Disk

Reply Vishal May 28, 2015 We recommend you try recovering your deleted files with a professional software and not with any free recovery apps. Couldn't repair, said to reformat, but couldn't erase anything either. Volume Erase Failed With The Error Couldn't Unmount Disk Any OS X boot drive is needed to complete the task. Disk Erase Failed With The Error Couldn't Open Device Does that make a difference?

fsck_hfs process was working away as shown by activity monitor. navigate here As of now, Stellar Partition Manager doesn't resize or partition Boot Camp. The HDD has been acting up recently, very slow performance, bad behavior etc. I am sharing the buy now link of Stellar Partition Manager so that you can resize your Mac ASAP. Partition Failed With The Error Couldn't Unmount Disk

Apple Hardware Apple Desktops Apple Notebooks Apple TV Other Hardware and Peripherals Developer Playground iOS Development OS X - Development and Darwin « Previous Thread | Next Thread » Thread Information If you have an external bootable disk, connect this to your Mac and power your Mac up whilst holding down the OPTION/ALT key. Running Mavericks Hide Question All replies Helpful answers Page 1 of 4 Next last by Kappy, Kappy Jan 21, 2014 1:48 PM in response to studio_ Level 10 (274,105 points) Desktops Check This Out Please tell me how I can get the Registration key of Stellar Partition Manager Software?

If you have used our method above to create a bootable installer, choose ‘Disk Utility' from the available menu. Error 69888 Couldn't Unmount Disk Be sure you backup your files to an external drive or second internal drive, the following procedure will remove everything from the hard drive! Also, the Quick Format didn't seem to work, I had to performa a standard format who took very long.

The above steps did the trick and everything was working again as expected.

Even the Network deployment tools like Apple's Netinstall service or the DeployStudio fails, on account of this error. You should not physically unplug the drive. Looks like it starts erasing, but then quits and says at least one volume could not be unmounted. At Least One Volume Could Not Be Unmounted Tried to force unmount to no avail.

How can I make this resizing possible? Summary: The post discusses how Eric Simson • October 3, 2016 0 7 New Year Resolutions – Lets Not Lose Our Data Anymore Before beginning the New • January 2, 2015 3 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”. this contact form I would suggest copy and paste.

Results 1 to 5 of 5 Thread: Disk Erase failed with the error: Couldn't unmount disk Tweet Thread Tools Show Printable Version Subscribe to this Thread… 07-19-2016,06:41 AM #1 defmuse View Bu videoyu Daha Sonra İzle oynatma listesine eklemek için oturum açın Ekle Oynatma listeleri yükleniyor... I've tried the original text and the one you suggested to Jon and it still says ‘command not found' Any ideas what's up? asked 2 years ago viewed 99239 times active 23 days ago Upcoming Events It's the season to ask about recommendations - do it well, please.

Hope this information helps. Level 10 (274,105 points) Desktops Jan 21, 2014 2:26 PM in response to Dr.Mac.