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#MAC UTILITY ANALYZE HARD DRIVE USAGE MAC OS X#
See Steps 1-2 of the Procedure specified in our "Resolving Disk, Permission, and Cache Corruption" FAQ for step-by-step instructions on repairing your startup disk using your Mac OS X Install disc. To repair your startup disk, you must startup from your Mac OS X Install disc or another drive on which Mac OS X is installed. You cannot use Repair Disk to repair your Mac OS X startup disk for example, Macintosh HD while your Mac is started up (booted) from such.Keep in mind the following key points about Repair Disk: All hard disks have one or more volumes or partitions.
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A volume, also known as a partition, is section of a physical hard disk which, from the perspective of the operating system, works like a separate disk. The directory is analogous to a combined address book and road map to where data is stored on a disk or volume. Repair Disk verifies and, if problems are found, corrects issues with the directory on a disk or volume. Verify or Repair? The Repair functions of Disk Utilityĭisk Utility, located in the Macintosh HD > Applications > Utilities folder, can perform two types of repairs via the following choices in the First Aid tab:.Why are repairs needed? When should I use these functions?.It is a subset of the more comprehensive information on these topics from our book, Troubleshooting Mac OS X. This FAQ provides a brief overview of the Repair Disk and Repair Disk Permissions functions of Disk Utility in Mac® OS X. The Repair functions of Disk Utility: what's it all about?