Large amounts of hard disk drive storage have become much less expensive in the last few years, but this type of storage is still not as reliable as tape or optical media in terms of longevity. Understanding Archive versus Disk ImageĪt its essence, archiving is the practice of saving copies of important information to another location or format better suited for long-term storage or network transfer. As you can imagine, maintaining a history of your file system is not space efficient, but it is extremely useful. On the other hand, the backup service introduced with Mac OS X v10.5, Time Machine, is an automated process that allows users to easily browse the backup history of their entire file system. Archive formats are efficient from a storage and data transfer perspective, but they generally require user interaction. In Lion, archiving is typically a manual process that involves creating compressed copies of selected data. Learn More Buy Using File Archives and Disk ImagesĪrchiving and backup are both synonymous with copying data to another location for safekeeping, yet in the context of this chapter, they are different processes serving different purposes. Apple Pro Training Series: OS X Lion Support Essentials: Supporting and Troubleshooting OS X Lion
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