![]() ![]() To reclaim disk space that is occupied by the free space on your sparse disk image, CCC will compact the disk image before attempting to mount it if the free space on the underlying volume is less than 25GB, or is less than 15% of the total disk capacity. As a result, the amount of disk space that the disk image file consumes will not necessarily reflect the amount of data that they consume. They do not, however, automatically shrink when files are deleted from them. The disk image file is larger than the amount of data it contains, why? Sparseimage and sparsebundle disk images grow as you add data to them. We recommend that you do not expand the disk image such that it is larger than the capacity of the underlying disk. from the Images menu in Disk Utility, select your destination disk image, then expand it as desired. If you have freed up some space on that disk since you created the disk image, you can manually expand the capacity of the destination disk image in Disk Utility. ![]() CCC initially sets the capacity of your disk image to the amount of free space on the underlying disk. Running out of space on a sparseimage or sparsebundle disk imageĬCC reported that the destination is full, but the underlying disk has plenty of free space. A sparse bundle may be desirable if the underlying filesystem upon which you save the disk image has a file size limitation (such as FAT32). Read/write "sparsebundle" disk imagesĪ sparse bundle disk image is similar to a sparseimage insofar as it grows as you add data to it, but it retains its data in many smaller files inside of a bundle rather than inside a single file. ![]() In general, sparse disk images only consume as much space as the files they contain consume on disk, making this an ideal format for storing backups. 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.
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