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OS X Tutorial: How to use Disk Utility

Learning how to use Disk Utility will help you keep your Mac fit and healthy

Rarely has a built-in Apple utility software been overlooked by so many users as Disk Utility. This is doubtlessly due in part to the sturdiness of Mac OS X, but it makes you wonder how what can easily be called Swiss-army knife software is frequently missed by the user in need of more advanced system management features.
From the many hard-disk managing functionalities to the CD/DVD burning abilities, not forgetting the fully stocked disk-image-making facility and the system recovery suite. Disk Utility performs, completely free of charge, many useful tasks which are only offered by commercial software at a premium cost.
All these features have contributed to make Disk Utility an essential part of the tool set required to maintain a healthy system or recover from a corrupt hard disk. We will now explore the key functionalities of this multi-talented application.

1: Repair non-startup disks
From the Utilities folder, launch Disk Utility and from the sidebar, select a disk or volume. In the First Aid tab, click the Repair Disk button to start.

2: Verify volume permissions
Select an item in the sidebar and, in the First Aid tab, click Verify Disk Permissions to check the file system permissions on the selected volume or disk.

3: Repair volume permissions
If permission errors are found during verification, select the volume in the sidebar and click on the Repair Disk Permissions button to start repairing.

4: Erase disks and volumes
Select the disk or volume to be erased from the sidebar and, in the main panel, the Erase tab. After choosing the Format and Name, click Erase to start.

5: Partitioning disks and volumes
Select a disk and, from the Partition tab, choose the relevant Volume Scheme and Volume Information. Click Apply to partition the disk or Revert to cancel.

6: Resizing disk partitions
Select a disk from the sidebar and click the Partition tab. Grab the bottom-right corner of the partition and drag it up or down to resize the partition.

7: Create disk images
From the Disk Utility File menu, choose New menu. Select the type of disk image, location or source. Enter the relevant information and click Save.

8: Burn CDs & DVDs with disk image
In the Disk Utility Toolbar, click the Burn icon. In the dialog box, choose the source disk image and click Burn. Insert a blank CD or DVD and click Burn again.

9: Erase RW CDs or DVDs
Select the disk to be erased in the sidebar and, in the main panel, click the Erase tab. Choose between Quickly or Completely and then click Erase.

Click Image to Enlarge