On 1/9/10, Earle Jones <earle.jones at comcast.net> wrote: > > Intel iMac -- X 10.6.2 -- HP printers, etc. > > I have several external HDs (all are USB connected) including an IOMEGA 320GB. > > The 320GB power unit died (loose plug-in prongs) and IOMEGA sent me a new >power unit. When I re-connect the HD, it is not recognized on the desktop. > > 'Disk Utility' can't find it; neither can 'Disk Warrior', TechTool Pro', >'Drive Genius' or anything else I can think of. Restart doesn't help. > > The disk drive is warm and rotating, the blue lamp is on, and the connections >are OK (I switched several HDs around to different USB slots.) > > What should I do next? Is there a terminal script that will scanfor HDs? Power down the new HD and disconnect it. Zap the PRAM as detailed in <http://support.apple.com/kb/HT1379>, hook up the HD, and power it up. That should do the trick. BTW, if any of those externals have aFW connection, hou should use it. FW's 40-50% faster than USB and designed for data transfers, whereas, USB is for talking to peripherals.