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You are here: MacNN Forums > Software - Troubleshooting and Discussion > Mac OS X > Can I extend/change sizes of partitions on a Hard Drive

Can I extend/change sizes of partitions on a Hard Drive
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Mac Enthusiast
Join Date: May 2005
Location: Bristol
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Oct 13, 2006, 05:04 PM
 
If I purchase a machine with 500GB and partition the drive say 250GB/250GB would it be possible to change that to say 300/200 or 400/100 if:

a) the OS was only formated/installed on one of the partitions?

b) the OS was formatted/installed on both partitions?

And indeed if it is possible HOW would I increase the size of the partion?
     
Clinically Insane
Join Date: Oct 2001
Location: San Diego, CA, USA
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Oct 13, 2006, 05:07 PM
 
Not easily or safely. There are programs that will let you do it, but it's better either to come up with a partition scheme that is right the first time or not partition at all. The only reason you'd ever have to partition would be to install two operating systems.
Chuck
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"Instead of either 'multi-talented' or 'multitalented' use 'bisexual'."
     
Mac Elite
Join Date: Sep 2006
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Oct 13, 2006, 05:39 PM
 
Remember the good old days of the first version of OS X?
Partitions....blech!
The only way to change partitions on the fly (without reformatting) involves very sketchy software partitions that aren't real partitions at all. Why do you want partitions? Chuckit is right, unless you need different bootable OS versions, they aren't much use.
     
Administrator
Join Date: Apr 2001
Location: San Antonio TX USA
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Oct 13, 2006, 06:34 PM
 
The only reason I can think of to partition a Mac's drive is for Boot Camp. Even a 500GB drive doesn't need to be broken up like you would for a Windows computer.

What would you use the second partition for?
Glenn -----
OTR/L, MOT, Tx
     
Posting Junkie
Join Date: Nov 2000
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Oct 14, 2006, 12:30 AM
 
Normally, on a Mac there is no need to partition the main drive (apart from Boot Camp but that will do it for you).

If you want to do it, you can use DiskUtility, but it will not do it on the fly.

For 'hot' repartitioning you need a tool like iPartition. The tool is expensive though and therefore I'd recommend you use this free shell command instead
diskutil partitionDisk

This shell command is rather new and I hope it won't be long until some dev releases a little GUI for it for free. iPartition is way too expensive.
     
Mac Enthusiast
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Oct 14, 2006, 12:37 PM
 
The reason for the partition is that come january/February I will have to use some editing software (avid express pro) to build a roughcut for the edit suite. They just told me that the machine I use should not be a regular connected to the internet machine, so no updates etc.

As I p[lan on getting a new desktop (20 or 24") to replace the PB I've been working on, I thought that I could partition the drive use a portion for the avid express pro which I would not make updates to the OS or connect to the web. And the other partition as my main work machine.
     
   
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