Data Format
Apple Disk Image files are essentially raw disk images (i.e. contain block data), optionally with one or two layers applied that provide compression and encryption. In hdiutil these layers are called CUDIFEncoding and CEncryptedEncoding.
UDIF supports ADC (an old proprietary compression format by Apple), zlib, and bzip2 (Mac OS X v10.4 and later only) compression internally.
Read more about this topic: Apple Disk Image
Famous quotes containing the word data:
“Mental health data from the 1950’s on middle-aged women showed them to be a particularly distressed group, vulnerable to depression and feelings of uselessness. This isn’t surprising. If society tells you that your main role is to be attractive to men and you are getting crow’s feet, and to be a mother to children and yours are leaving home, no wonder you are distressed.”
—Grace Baruch (20th century)