Formatting a Toshiba 1TB HDD For Mac

by admin on June 24, 2009

I recently picked up a 1TB external drive for a very reasonable £74.95 from Amazon.co.uk. It came pre-formatted as FAT32 which was fine as I was going to use it primarily for my Windows XP installation via VMWare. Eventually I was going to partition it off to use some of the space for Mac storage.

Now that I have this new Mac which came with a 640GB HD I moved the VMware files onto the internal drive for speed and then wanted to format the 1TB drive for Mac OS (HFS).

I hit a minor snag as I couldn’t seem to format the drive due to an error: “Partition size not a multiple of 4k”. A moment with Google provided the answer which I’ve repeated here for anyone else that comes across this problem.

  • Launch Disk Utility (It’s in Applications/Utilities but you knew that)
  • Select the drive you wish to format and click on the “Partition Tab”
  • Unless you actually want to partition the drive, select “1 Partition”
  • Click the “Options” button and select “GUID Partition Table Scheme”
  • Click on “Erase” and you’re done.

{ 3 comments… read them below or add one }

1 Colin Bone August 17, 2009 at 3:24 pm

Thanks for the simple info re the Toshiba drive. I had run into the same problem. Cheers.

2 Paul December 2, 2009 at 3:42 pm

Greetings from America! You saved my life with that little hint.

Cheers.

3 Juergen December 14, 2009 at 10:37 am

Hallo Matt!

Thank´s a lot for your help. Didn´t change to GUID Partition! Now it works. Wich you all the best and greetings from Germany!

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