Archived - Mac OS X v10.5: About resizing disk partitions
Learn about resizing disk partitions.
This article has been archived and is no longer updated by Apple.
What kinds of partitions can be resized in Mac OS X v10.5 Leopard?
Mac OS X v10.5 Leopard can resize any disk partition except a Master Boot Record Partition. You can use Disk Utility to see if a partition is a Master Boot Record Partition, and also to resize eligible partitions.
Important: Resizing a Master Boot Record partition will erase all data on it, so be sure to back up important files on affected partitions first.
What is a Master Boot Record?
A Master Boot Record, or MBR, is the first sector of a partitioned disk volume. It contains information about how how your disk is partitioned. See this article for some advanced details.
Here are some third-party websites with more information:
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