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disk partition problem
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Forum Regular
Join Date: Dec 2002
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On my mac Pro, 10.4.9 I have an internal disk with 2 partitions that I want to reformat. Using disk utility, partitioning fails with the message "can not unmount". I notice that there are no icons to unmount these in the finder as well. Also I can't repair the overall disk getting the same "can not unmount" message. Any suggestion appreciated! thanks...Peter
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Senior User
Join Date: May 2001
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Boot from the Software Restore DVD and use its copy of Disk Utility.
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Forum Regular
Join Date: Dec 2002
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Originally Posted by Moose 
Boot from the Software Restore DVD and use its copy of Disk Utility.
thanks, will do
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Posting Junkie
Join Date: Mar 2004
Location: MacNN database error. Please refresh your browser.
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Might need to ask yourself why are you partitioning in the first place? Unless you are a developer or maybe running Parallels, there's no reason to partition OS X save that so many ex-Windows users still have that mindset.
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Forum Regular
Join Date: Dec 2002
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I partition my start up disk so that I only am cloning the system and applications when I back up......Peter
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Senior User
Join Date: May 2001
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Originally Posted by innerimager
I partition my start up disk so that I only am cloning the system and applications when I back up......Peter
Wait, wait.
You're trying to repartition your startup disk?
You can't partition a disk that contains the active startup volume (with the GUI in Disk Utility).
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Forum Regular
Join Date: Dec 2002
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Originally Posted by Moose
Wait, wait.
You're trying to repartition your startup disk?
You can't partition a disk that contains the active startup volume (with the GUI in Disk Utility).
Hi- The disk I was having trouble partitioning was not the start up disk. And btw I followed your advice and it worked fine. As to the start up, what I have done for years is to clone it to an external drive, then boot from the external, and partition the original startup, giving 60-70 GB for the system and apps. The other 200GB becomes a data disk. I have a 70 GB external partition and then regularly clone/backup (Superduper) to it. I like the system a lot. The disks I was having trouble were two internals from my old G5 that I wanted to reformat as a RAID. thanks for the help, best....Peter
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