Erase Or Format Your Mac S Drives Using Disk Utility
Getting to Know Disk Utility in OS X Yosemite and Earlier Disk Utility works with disks and volumes. The term “disk” refers to the drive itself. A volume is a formatted section of a disk. Each disk has a minimum of one volume. You can use Disk Utility to create a single volume or multiple volumes on a disk. It’s important to understand the relationship between a disk and its volumes....