My iMac (Intel , OSX 10.4.11) has been happily working with my G-Raid external hard drive for over a year. But now, after the computer cord was disconnected yesterday, it refuses to mount the G-Raid or recognize it anywhere. Can't find it in the Disk Utilities or under "About this mac -- Firewire." Called Apple service and tried everything the agent recommended...PRAM diagnostic reboot, power surge, plugging, unplugging...nothing helped. The problem isn't with the G-Raid, which works fine plugged into my old Powerbook with the same firewire. Grateful for any help, as I really need the G-Raid -- it's got all my projects, music, photos....