Hi Ronni, The external HD began to stop working about 12 to 14 months or so ago. It would be intermittent at first, sometimes it would not connect and other times it would, As I was generally using the monthly back up it was not big deal. More recently I had to use the SMC reset to get it to work. Then about 4-5 months ago I bought a USB hard drive for the back ups, as it didn’t seem to connect at all and put it out of my mind.
Neither of them show in Disk Utility. System Profiler under Hardware says - FireWire Bus: Maximum Speed: Up to 800 Mb/sec Neither shows in System Profiler when connected to the FW800 port I connected them to the 20” iMac and in the System Profiler they showed up - FireWire>FireWire Device Tree>FireWire Bus>My Book The same with Disk Utility, they showed up as a disk on the LHS. Take care. Matt. Hi Matt, When did these external HD stop showing on the Desktop? Do either of these external HD show in Disk Utility on the 27 inch iMac? Have you checked the FW800 port in System Profiler? When connected to the FW800 port do they show in System Profiler: under Hardware - FW800 - status: ? Cheers, Ronni > On 22 Sep 2017, at 12:44 pm, Matt Falvey <[email protected] > <mailto:[email protected]>> wrote: > > Hi, I have an iMac 27 inch Late 2009, 2.8 GHz Intel Core i7, running OSX > 10.10.5, with one Firewire 800 port which does not work. > > I have two external HD?s, neither show on the desktop nor light up to > indicate that they are operational when I connect them to the iMac. > > > I also have an iMac 20 inch 2.4 GHz Intel Core 2 Duo, running OS X 10.9.5. If > I connect either of the two above external HD?s to it they both show up > straight away and I can see all the files on them. > > > One of the external HD?s in my backup for the 27 inch iMac, the other > contains large movie files so I really need the FW800 port to operate. > > > By using external HD?s on the 20? I believe I have ruled out the cables as > causing the problem as they both work. > > I have disconnected everything from the 27? and reset the SMC, still it does > not show. > > I have connected the external HD to the 20? and made it active and then tried > to piggy back it, using its other FW800 port, and one of the tested cables, > to the 27?, it still did not show up. > > I did the exact same as above and put an SMC reboot in the middle. > > > Anyone have any ideas on a possible remedy? > > Thanks > > Matt.
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