You can also burn GParted to a CD, boot it and try to format your external HD from it. If it's the new one, it could be bad out of the box. Very smooth. So the first thing to do is to startup the Mac from another bootable drive such as an external drive or OS X Recovery. this contact form
Disk Utility, if that's what you used, should have thrown up an error message when you tried to encrypt a drive with an incompatible file system. My point is that there can be other, less serious, reasons for a drive to become inaccessible or unresponsive and drastic measures should not be the first resort. Warren July 21, 2015 at 10:48 pm Thank you! Then the resolution lies in the previous method. https://discussions.apple.com/thread/2136692?tstart=0
This time, reformatting by the Mac worked. Reply Ben says: September 17, 2016 at 2:50 pm Is there a way to work around needing a password? I had pretty much given up when I came across your post.
Rima May 16, 2016 at 2:20 am how much time should i wait before pressing ctrl C(or close the terminal)? Eject and hope someone has a solution for me!!!!! It if truth be told was once a enjoyment account it. Force Unmount Mac Now You Mac will Boot from the DVD. 5) Stellar Partition Manager is mounted on the DVD.
Lloyd Smith September 15, 2016 at 11:23 am A long time to reply, but when someone assumes that the person they are responding to is pretty much a dullard and finally Can't Unmount Disk Mac The drive DW comes on will boot older Macs, including PPC models, so creating an emergency disk for your current system is a good idea. If this happens, the drive may show up in the Finder sidebar but not show data when clicked, or it may just not show up but be present in Disk Utility; Selecting "1TB Seagate USB…" still has Mount grayed out but Eject is active.
Still, obviously, the drive in non-functional. Couldn't Unmount Disk External Hard Drive Once, more thanks a lot for Macissues. One, that the drive is still formatted as HFS+. Angelo Maralit 214,796 views 4:13 Loading more suggestions...
Sign in 147 263 Don't like this video? Couldn't Unmount Disk Mac Watch Queue Queue __count__/__total__ Find out whyClose Disk Erase Failed with the error: Couldn't unmount disk - FIX Mac acguevara SubscribeSubscribedUnsubscribe33,67133K Loading... Partition Failed With The Error Couldn't Unmount Disk Thank you!
This will not work if the error was triggered by attempting to modify the boot disk through partitions or formatting, and you will need to use the method above instead. http://gsbook.org/unmount-disk/mac-could-not-unmount-disk-external-hard-drive.php Thanks again!!! At this point I'm not sure what else to try. If you can access the drive on Windows, go ahead and format it Fat 32. Error 69888 Couldn't Unmount Disk
Thank you. Clang August 25, 2015 at 12:36 am Hot damn! Your password is being accepted. http://gsbook.org/unmount-disk/formatting-hard-drive-mac-could-not-unmount-disk.php I have been using WD My Book Essential (3TB) as time machine.
share Share on Twitter Share on Facebook Email Link Like + Quote Reply lagopede, Aug 14, 2013 lagopede macrumors newbie Joined: Oct 20, 2011 #6 This fixed the problem for me Volume Erase Failed Couldn't Open Disk And it may be—until you need it. Thanks again for your great help!
Cannot run CTRL-C command. Jefferson Le Blanc May 10, 2014 at 4:47 pm While Topher's expertise is remarkable, it was you who solved the problem through incredible persistence (with a nudge here and their from Carter August 12, 2015 at 2:33 pm Was having trouble "cat..ing" /dev/random to the disk due to the resource busy response. Disk Erase Failed With The Error Couldn't Open Device Jefferson Le Blanc August 1, 2015 at 5:24 pm Larry, rather than trying to erase the drive, reformat it instead.
Transcript The interactive transcript could not be loaded. Could you also let me know the file format to which your external drive was formatted before this error? Somebody knows how to do it for the LaCie XtremKey USB3 pendrrive? http://gsbook.org/unmount-disk/formatting-hard-drive-could-not-unmount-disk.php I will really appreciate, if you can help me out.
Can someone help?? Sep 7, 2009 5:27 PM Helpful (0) Reply options Link to this post by Christine Davies, Christine Davies Sep 8, 2009 3:53 AM in response to Christine Davies Level 1 (0 I ran Disk utility repair disk but it gave me back this message ‘Disk Utility can’t repair this disk. King May 23, 2016 I am trying to restore my Mac OS X El Capitan from an external drive to my Mac HD.
After searching for a very long time through forums of people suggesting basic things or trying to make others feel ignorant this solution worked! 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 After about 15 minutes waiting, I unplugged and plugged back the pendrive. So, I try to erase with the default options, i.e., Mac OS Extended (journaled), Security option fastest.
Jefferson Le Blanc June 18, 2016 at 3:21 am @ John D: It may not be possible to determine at this late date, but I'm curious how the drive got corrupted B. Results like these, therefor, seem a bit random. Cox 356,526 views 5:16 How To Format a USB drive on Mac - Duration: 5:29.
I had to press the carriage return and then it was saved at "Macintosh HD/Users/~" and the Terminal nano showed [ Wrote 4 lines ]. - At step 6, I got If you can't remember it, reset it (you can do so from recovery mode): https://discussions.apple.com/docs/DOC-4101 Reply Jerry says: October 5, 2016 at 5:25 pm thx Reply Nate says: October 25, 2016 Resource busy". Yet, I cannot partition the drive.
MaX June 1, 2014 at 11:51 pm Topher, as I said above, it would be great if you could write an article about it (flashing pendrives). You can then run Disk Utility from there.