Because of Time Machine's incremental backup method, only a small amount of data needs to be sent over your network to backup to a wireless Time Machine. You can connect a disk to your router or Airport, click a few buttons and you'll have a reoccurring wireless backup system. While this generally works out very well, that initial backup to Time Machine has to copy all your files and can take forever! Even if you're connected via ethernet you'll looking at a great deal of transfer time. This little trick will make that first backup incredibly faster.Read the Article
Lately your networked Time Machine drive (or Time Capsule) has stopped backing up! Maybe you've received the error message "Unable to complete backup. An error occurred while copying backup files." Perhaps you tried to mount the sparseimage and found it was corrupted. It's just as likely that you never got an error at all, and just now noticed that your Time Machine hasn't backed up for weeks! If you run Time Machine over a network or use a sparseimage file, then there may still be hope for your backups.
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