My favorite use of disk images is as a secure, encrypted drive for important data. It could be a virtual hard drive for a virtual machine, a copy of a DVD or Blu-Ray disc, or an archive for an application that wants to use an entire disk. ![]() A disk image is a file on a disk that acts like a separate disk. Buy a 4 TB hard disk drive and you can format it and store (about) 4 TB of stuff on it.ĭisk images are a little less familiar to average folks, but they work pretty much the same way. We’re all used to dealing with hard disk drives and thumb drives: They offer raw “block” storage that is formatted with a file system and used by the operating system, applications, and us users. I suppose I should start with a bit of background info on why I love sparse bundles so much. ![]() ![]() ![]() So I thought I’d write up a bit on what they are and how they can be used. I’m a big fan of “sparse bundle” disk images in Mac OS X. They allow me to create encrypted repositories for valuable data that can efficiently be rsync-ed between disks and don’t waste a lot of space.
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