View Full Version : partitioning problem

24th January 2010, 10:06 PM
hi there,

i have a current model macbook pro 13.3" running osx 10.6.2. it is my first mac and it is a great machine! however the standard 250gb hard drive is a little on the small side for me, so i purchased a 500gb hard drive as an upgrade.

to get my data from the old 250gb drive to the new 500gb drive i used a borrowed diskjockey pro (http://www.diskology.com/djstandard.html) which copies the data across sector by sector to make an exact image - very easy! after using this tool i installed the 500gb hard drive and the machine booted up first time and works just like it did before.

unfortunately, when i try to create a new partition in OSX's disk utility to take advantage of the extra space i get an error. it says 'partition failed with the error: the chosen file size is not valid for the chosen filesystem'. if i try to resize the existing partition to use up all of the available space i get a different error. it says 'partition failed with the error: mediakit reports partition (map) too small'.

so at the moment i can't figure out a way of using the extra 250gb of space!

it seems that this might be because of the way i copied the drive - because it copied everything off the 250gb drive sector by sector the partition table on the 500gb drive must think it is a 250gb drive?? indeed in the support section of the diskjockey website they say that it can be a problem (http://www.diskology.com/support.html) and they offer a pretty straightforward method for fixing this with a windows machine... but nothing for a mac. grr, frustrating! but so easy to fix on a windows machine.

sooooo.. can anyone help me please?? how do i fix up the partition table on this mac!?

24th January 2010, 10:30 PM
If you still have the original data on the 250GB drive, you could use either Carbon Copy Cloner (http://www.bombich.com/ccc_features.html) or SuperDuper! (http://www.shirt-pocket.com/SuperDuper/SuperDuperDescription.html)

24th January 2010, 10:35 PM
thanks for your clever reply - but i've already explored that option :( i still have the data on the 250gb drive, but i don't have an external hard drive caddy. so i don't think CCC or SuperDuper will work as I have no way of having the 250gb and 500gb drives connected at the same time.

edit; i know it'd be pretty straight-forward to go and buy a caddy, but that'd mean driving to the store and spending $40 on a caddy that i'm only going to use once and removing the bottom of my macbook again. essentially it's a software problem so i'm hoping i don't have to juggle hardware around to fix it! :)

24th January 2010, 10:49 PM
How did you connect it before to copy the data across?

24th January 2010, 10:57 PM
The problem from what I can work out is that you created a start up disk and a partition of 25o Gig - Now from what I remember you can't partition a drive that is also your start-up drive!

So you have a chicken and egg situation - You may be able to start up from your install DVD and use the disk utility to manage / format the additional 250 gig - but what I would do is
back up -
create a 500 GB partition (or what ever setup you wanted)
then move everything back on to the start-up drive.

Hope this makes sense!

24th January 2010, 11:00 PM
clockwork - read the OP! :)
nevets - in diskutility it shows one 250gb partition, and 250gb of free space. i get an error as described when i try to create a partition in this spare space. but i didnt think of trying to partition it with the OSX disk, thanks! i'll give it a go and report back.

25th January 2010, 03:31 AM
ahem... my point was - if you used a SATA to SATA USB 2.0 cable adapter kit to copy the data across - something like - eg: Century USB to IDE+eSATA Converter (http://www.tryandbyte.com.au/cgi-bin/page.pl?page=2268&title=Century%20USB%202.0%20to%20IDE%2BeSATA%20Con verter), why not use this same adapter in combination with something like CCC or SuperDuper - the copying feature of each being free on the download offer.

Either of these two apps should not create a partitioning problem, just as long as you initialize the 500GB HDD in Disk Utility first, in the standard Mac OS X Extened (Journaled) format.

25th January 2010, 08:29 AM
the data is already on the 500gb drive and i see no reason to go and buy new hardware to fix a software problem. it is a 30sec fix on windows, why is it so hard on a mac? :)

25th January 2010, 08:49 AM
I never said to buy new Hardware - I used the Century Adapter as a parallel example of your Diskjockey, and have and am, still questioning why not simply copy the data again, using Super or CCC, both of which are free and neither of which copy with a partitioned size.

25th January 2010, 08:54 AM
ahhh right - i see what you are trying to say :) i'll give it a go

25th January 2010, 10:34 AM
so have had a bit of a fiddle
using the diskjockey pro i can mount the 250gb drive via usb, but i cannot boot from it
so i can't wipe the 500gb drive and do the CCC method without removing the back cover from the mac and switching the hard drives around again
it's a painful workaround, but it works!!
so thanks clockwork for your help :)

it'd be much nicer if i could just fix the partition table tho!! :(

25th January 2010, 05:33 PM
You can but the software costs $$$s.

Back to Time over Money.

25th January 2010, 05:45 PM
what is the software called??
i have looked at a few mac-based options and none of them will actually fix the problem :(

25th January 2010, 05:51 PM
iPartition (http://www.coriolis-systems.com/iPartition.php) by Coriolis Systems - @ 29.95 / $AU53.27