Register FAQ / Rules Forum Spy Search Today's Posts Mark Forums Read
Go Back   MacRumors Forums > Apple Systems and Services > Mac Basics and Help

Reply
 
Thread Tools Search this Thread Display Modes
Old Apr 2, 2010, 10:32 AM   #1
Bennieboyİ
macrumors 65816
 
Bennieboyİ's Avatar
 
Join Date: Jan 2009
Location: england
Send a message via MSN to Bennieboyİ
Disk utility error : disk could not unmount

Hey guys, i'm trying to format a spare external, it's currently formatted to ms-dos for back up dutys on my PS3 but i want to change it to mac os extended

i've just plugged the drive in ( USB ), nothings running on it, or open on the computer from the drive, but disk utility wont erase it, i've checked permission and everythings fine but it just keeps giving me this error

google and apple fail, only thing i can find linked to it refers to operating systems running on the drive,
Attached Thumbnails
Click image for larger version

Name:	Picture 1.png
Views:	647
Size:	101.9 KB
ID:	220484  
__________________
Macrumors IRC: irc.krono.net room #macrumors download Colloquy or Adium
Search before you post: MRoogle
Bennieboyİ is offline   0 Reply With Quote
Old Apr 2, 2010, 08:55 PM   #2
BlueRevolution
macrumors 601
 
BlueRevolution's Avatar
 
Join Date: Jul 2004
Location: Montreal, QC
Usually this error means that some file on the partition is in use. Try relaunching Finder by control+option+clicking on the Finder icon in your Dock and selecting Relaunch. You can also try unmounting the partition manually by selecting it in Disk Utility and clicking Unmount in the toolbar.
__________________
PIRATE PARTY OF CANADA — Information leadership for the 21st century
BlueRevolution is offline   1 Reply With Quote
Old Apr 3, 2010, 04:00 AM   #3
Bennieboyİ
Thread Starter
macrumors 65816
 
Bennieboyİ's Avatar
 
Join Date: Jan 2009
Location: england
Send a message via MSN to Bennieboyİ
awesome blurevolution it worked a treat much thanks
__________________
Macrumors IRC: irc.krono.net room #macrumors download Colloquy or Adium
Search before you post: MRoogle
Bennieboyİ is offline   0 Reply With Quote
Old Aug 17, 2011, 08:28 PM   #4
tigerfan34
macrumors newbie
 
Join Date: Oct 2009
Quote:
Originally Posted by BlueRevolution View Post
Usually this error means that some file on the partition is in use. Try relaunching Finder by control+option+clicking on the Finder icon in your Dock and selecting Relaunch. You can also try unmounting the partition manually by selecting it in Disk Utility and clicking Unmount in the toolbar.
I'm having the same issue. I tried what you suggested and it didn't work. I'm trying to reformat a thumb drive (4gb). The drive won't allow me to delete anything off of it. I get the can't unmount message when I try to reformat. Any help would be great. Thanks.
tigerfan34 is offline   0 Reply With Quote
Old Oct 18, 2012, 08:47 PM   #5
Zwhaler
macrumors 603
 
Zwhaler's Avatar
 
Join Date: Jun 2006
I'm having the same issue and relauching the Finder does not help. I can't find a whole lot of other resources on the web instructing me how to format this drive with this error message.
Zwhaler is offline   0 Reply With Quote
Old Aug 14, 2013, 03:26 AM   #6
lagopede
macrumors newbie
 
Join Date: Oct 2011
This fixed the problem for me (Finder reset didn't work)

http://www.macappguide.com/2009/03/1...t-in-mac-os-x/
lagopede is offline   0 Reply With Quote

Reply
MacRumors Forums > Apple Systems and Services > Mac Basics and Help

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
thread Thread Starter Forum Replies Last Post
The disc you inserted was not readable by this computer DukeSnyd MacBook 11 Jun 17, 2013 03:45 AM
Neither Disk Utility nor Boot Camp are working sclomps Windows, Linux & Others on the Mac 6 Oct 10, 2011 02:43 AM
Disk Utility Replacement caen1 Mac OS X 10.7 Lion 16 Aug 30, 2011 04:49 PM
Cannot unmount disks internally street.cory MacBook Air 0 Jun 15, 2011 11:54 AM
HELP!! Partition failed Could not unmount disk. FAT to NFS stu3ufc Mac Basics and Help 2 Apr 25, 2008 09:48 AM


All times are GMT -5. The time now is 02:19 AM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC