Mystery internal HD partition

Hey all,

As a novice Mac user I recently purchased a 15" MBP with 100 GB hard drive. I wanted to trial bootcamp, but when I consulted Disk Utility it shows that I have two existing partitions.

The first is Macintosh HD (Mac OS Ext Journaled, 72.7 GB).

The second 'mystery' partition is disk0s3 (Apple_KFS 20 GB).

It is not mounted, doesn't seem to respond to any actions (won't mount) and I don't know what it is for. The only thing that I can think of is that it is an Apple swap file, but 20GB seems very large on a 100 GB HD.

Can anyone help me with whether this is a default on new MBP hard disks, what it might be and whether it can be reformatted as a winXP partition with Bootcamp.

Thanks in advance.

Mac Book Pro Mac OS X (10.4.6) 15" 2.16 GHz - 100 GB @ 5400 RPM

Posted on Jul 3, 2006 7:06 AM

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Mystery internal HD partition

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