a MAC address is for networking hardware. 1st thing i would try to do is uninstall the ATA card and its drivers/kext's and see if the panics go away. there have always been lots of problems with sonnet's cards... http://www.xlr8yourmac.com/OSX/sonnet_ide_cards_and_10_2.html#storytop http://www.xlr8yourmac.com/IDE/sonnet_ata_100_problems.html http://www.xlr8yourmac.com/IDE/sonnet_ata_100/ sonnet_ata_100_reports.html YMMV, sandor On Mar 2, 2004, at 12:43 PM, k s d wrote: > The Panic screen shows what looks > to be a MAC hardware address. > > Is there any info on the web that shows what these addresses mean and > what > hardware component they're associated with? > > Thanks, > -kevin