Read/write "sparse" disk imagesĪ sparse disk image is a type of read/write disk image that grows as you copy files to it. To back up to an existing disk image, select "Choose disk image." from the Destination selector and locate your disk image. If you want a read-only disk image for archival purposes, set the image format to one of the read-only formats. If you plan to back up to this disk image again in the future, set the image format to one of the read/write formats.Provide a name and choose a location to save your disk image.
Choose "New disk image." from the Destination selector.Choose your source volume from the Source selector.Disk images also greatly improve the performance of backing up to network attached storage (NAS) devices, such as the Airport Extreme Base Station and Time Capsule. Carbon Copy Cloner leverages disk images to provide you the flexibility of storing several complete backups on a single shared external hard drive. When you want to access the contents of that filesystem, you double-click on the disk image to mount the disk image as if it were an external drive attached to the machine.
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We recommend that you only use a disk image if you are backing up to a network volume.Ī disk image is a single file residing on your hard drive that contains the entire contents of another hard drive (except for the free space). To create a bootable backup, you must back up to a hard drive that is attached directly to your Mac.
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