Hangs with FireWire drives

If you are experiencing system hangs when you backup to a FireWire hard drive, please check whether you have more than one FireWire device (a CDR/W drive, a camera, or a hard disk, for example) connected to your computer.

A shortcoming of the FireWire driver in Mac OS X through version 10.1.4 causes system hangs when large amounts of data are copied to or from a FireWire disk.

This happens with the Finder as well as Synchronize! Pro X, although it is more likely to occur with Synchronize! Pro X because it is often used to copy much more data, and it is optimized to copy files at higher speeds.

This does not occur if a single FireWire disk is the only FireWire device connected to your computer.

For more information, please see Apple Knowledge Base article 106512 at this URL:

http://kbase.info.apple.com/cgi-bin/WebObjects/kbase.woa/33/wa/query?searchMode=Expert&type=id&val=KC.106512