Maybe the 10.2.8 update will help? (providing you are using OSX) I got this from Apple: -------10.2.8 update enhancements......... Addresses a situation in which an external FireWire storage device would not become available (mount) and this message would appear: "A disk attempting to mount as 'unknown' has failed. Please use Disk Utility to check the disk." ------------ Quoting ShirleyK <ShirleyKat at cox.net>: > Would you think that if the drive powers up (and sounds normal), the > light goes on on the enclosure, but the drive just never appears on the > desktop that it could still be a power problem? > > Shirley > > On Wednesday, October 15, 2003, at 06:01 AM, Michael Winter wrote: