Apr 24 11:25:26 jsg3-10 mach_kernel: disk1s9: 0x3 (UNDEFINED). Apr 24 11:34:00 jsg3-10 mach_kernel: disk1s9: 0x3 (UNDEFINED). What does this message mean? Which kext is printing this message? The last reboot was on: Apr 18 14:44:58 jsg3-10 reboot: rebooted by sbytnar I leave the machine going 24x7. disk1s9 is a journaled HFS+ file system on a 120GB master IDE drive, on bus ide@20001. Each time this message appeared, a long delay of around 2 minutes was observed. After 10 minutes and 4 printouts of the message, the machine stopped being usable (all disk activity halted) and had to be power cycled. I left it powered off for a few hours and booted into 9.2.2. No SMART errors were reported. Booted back into 10.2.5, and it has been fine since. Thanks, --Steve _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.