![]() As files becomefragmented, the locations of the fragments are stored here. ![]() Several things are checked duringthis process:Įxtents overflow fileThe Extents file keeps track of fileinformation that could not be placed contiguously on a disk. If errors are found, they will be reported. StopHalts the current action (Verify or Repair). Repair Disk PermissionsRepair any incorrectly assigned permissions.Permissions can only be repaired on your current boot disk. If you're having trouble installingapplications or deleting files, you may have a permissions problem. Verify Disk Permissions≼heck to make sure that your Mac OS X volumehas the proper permissions set. You can only repair volumes other than your bootdisk. ![]() Repair DiskPerforms the same tests as Verify but automaticallyfixes any errors it might find. Verify Disk≽isplays any errors found in your disk but does notattempt to repair them. Next, click the appropriate action button: To check or verify a disk, select the disk and partition from the volume listat the left of the window. In addition to basic diskrepair, the First Aid tools can also fix any file permissions that mayaccidentally have been changed while using your computer.įigure3.57 Use Disk First Aid to repair damaged volumes. Unfortunately, Disk First Aid is not capable of repairing extensivedisk damage, so third-party utilities such as Micromat's Drive 10 andTechTool Pro( )are still important parts of every software library. It functions on UFS, HFS+, and HFS volumesmeaning that you canrepair both types of Mac OS X partitions and both types of Mac OS 8/9partitions. The First Aid pane, shown in Figure 3.57, can perform basic repair operationson a drive. If you choosea partition, you do not see the partition controls because you can'tvery well partition a partitionnor can you apply RAID settings to apartition and so on. If youchoose a disk, for example, you see all the control areas. The button bar changes depending on the object you've selected. can report potential problems beforethey occur, warning you of imminent drive failure.įigure3.56 The left pane contains your disk resources the right pane displaysthe operation you are performing on your disk. (Self-Monitoring Analysis and Reporting Technology)status. Although most of this information is self-explanatory, ofinterest is the S.M.A.R.T. Each button opensa pane that performs a different function within the application, as you mightguess from their names.Īt the bottom of the Disk Utility window is a display of the details of theselected disk object. When a disk is selected, up to five button bar selections appear in thecontent area: First Aid, Erase, Partition, RAID, and Restore. Grayed outpartitions are system partitions that do not contain files that you can verifyor repair. To the right of the disk list is the content pane, which displays controlsfor operating on the selected disk item.ĭisks are listed with each of their partitions displayed. Start (or restart) your Macintosh while holding down the C key.Ĭhoose Open Disk Utility from the Installer application menu.Īfter launching Disk Utility, the application opens to display a list of yourdisk resources in a pane on the left side of the window, as shown in Figure3.56. Insert your Mac OS X Install CD into your computer. To use Disk Utility to work on your primary disk,follow these steps: If you only intend to work with a secondary disk or partition, launchDisk Utility from the Finder. Aswith Mac OS 9, you cannot use either of these functions on your startuppartition. Disk Operationsĭisk Utility combines disk repair with disk formatting and partitioning. To discuss Disk Utility, we'll approach it from twosides: the disk imaging aspect and disk repair features. DiskUtility (path: /Applications/Utilities/Disk Utility) can still be usedto create disk images and repair volumes, and has gained a few additionalfeatures as well. In Panther, Apple has combined its two disk-related utilities≽isk Copyand Disk Utilityinto a single application (still named Disk Utility). ![]()
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