As others have noted Merv.....not worth it. I fail to see the value in it even if it were technically possible. If it were a legacy device that you just had to have, maybe...but an external Hard Drive? Nup. Just plug it into your USB port on your iMac and it will work OK, just not as fast as Firewire800. Alternatively, get an external Firewire 800 case and transfer the drive (assuming it's not a chipped drive).
Stuart On 27/04/12 10:22 AM, "hugh griffiths" <[email protected]> wrote: > > The power issue is the one I would be the most cautious with, USB is 5 v or > less, but firewire can be up to 40 V ( different ampages as well and I would > be very worried as the pins for power would be different as well) > > Hugh > >> Subject: Re: Cables: USB 3 - Firewire800 >> From: [email protected] >> Date: Fri, 27 Apr 2012 09:03:27 +0800 >> To: [email protected] >> >> Got in before I did Carlo :) So won't rehash what you've written,..lol :) >> But yes, I'd be a bit cautious. The other thing would be if you'd see any >> "real world" speed difference. The USB3 would only be running at USB2 speed >> as that is what the Mac would expect, so it's not going to "convert" to >> Firewire speeds, so I think you'd still be gaining USB2 speeds anyway. So no >> real "improvement". >> I could be wrong here, but I also had the impression there were differing >> "data versus power" consumptions through both a USB and Firewire cable. (ie >> one pulls through or expects more power and data then the other). So wouldn't >> want to fry anything if there was. Again, I could be wrong there,... >> >> Found this info as well, which may help with it... >> /quote >> Firewire is "isochronous", basically meaning that you can pump "clocked" data >> though it in real time. USB works more like TCPIP, with the data chopped up >> into packets and later reassembled. (Thus, at a minimum, you have latency, >> that is, the wait for the data to be "put back together".) Second, the >> Firewire protocol allows more direct address to memory (including mass >> storage) with minimal intervention of the CPU. >> /end quote >> >> I can't lay my hands on the other info I thought I had and Siri can only do >> so much when driving,..lol ;) >> >> Kind regards >> Daniel >> >> Sent from my iPhone 4s >> >> --- >> Daniel Kerr >> MacWizardry >> >> Phone: 0414 795 960 >> Email: <daniel AT macwizardry.com.au> >> Web: <http://www.macwizardry.com.au> >> >> >> **For everything Macintosh** >> >> On 27/04/2012, at 8:46 AM, cm wrote: >> >>> Hi Merv and Peter, >>> >>> I would be wary of those connectors. Notice they are all on resale sites, >>> none are manufacturer sales. They could be fakes. >>> >>> As I said earlier, I don't believe it is possible to convert USB to Firewire >>> with just a simple pin-to-pin cable. USB used the PC as the bus master >>> whereas Firewire is a true peer-to-peer connection and required handshaking >>> signals back from the disk drive. >>> >>> Cheers, >>> Carlo >>> >>> >>> On 27/04/2012, at 7:10 , Peter Sealy wrote: >>> >>>> I thought I had a vague memory (at my age all memories are vague) of seeing >>>> USB to Firewire converters somewhere. So I did a quick Google search and >>>> came up with these. I have not looked in depth at any of them and have not >>>> explored any further but the Google search will surely find more info. >>>> >>>> <http://www.ebay.com/sch/sis.html?_kw=USB+A+MALE+TO+IEEE1394+4+PIN+Firewire >>>> +ADAPTER+CONVERTER> >>>> <http://www.amazon.com/NEEWER®-Travel-Firewire-Cable-Adapters/dp/B00354MVP0>>>> > >>>> <http://www.ask.com/questions-about/Firewire-USB-Converter> >>>> <http://www.wisegeek.com/what-is-a-firewire-to-usb-adapter.htm> >>>> <http://www.alibaba.com/showroom/usb-to-firewire-converter.html> >>>> >>>> Search Google : convert usb to firewire adapter >>>> >>>> HTH >>>> >>>> .............................. >>>> >>>> Peter Sealy >>>> Thurgoona AUSTRALIA >>>> >>>> She was only a whiskey maker, but he loved her still. >>>> >>>> >>>> >>>> On 26/04/2012, at 11:28 PM, Merv Bond wrote: >>>> >>>>> I have been looking on the net at cables, converters and hubs that boast >>>>> connections between USB and firewire. My search is based on wishing to >>>>> connect an external HD with USB3 sockets to my iMac which has a >>>>> Firewire800 socket. Has anyone used such a cable and if so is the >>>>> performance of a quality that is useful? Can a bootable external HD be >>>>> achieved with such a device? >>>>> Merv >>>>> -- >>>>> The whole psychology of modern disquiet is linked with the sudden >>>>> confrontation with space-time. (Teilhard de Chardin, 'The Phenomenon of >>>>> Man') >>>>> -- The WA Macintosh User Group Mailing List -- >>>>> Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> >>>>> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> >>>>> Settings & Unsubscribe - >>>>> <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug> >>>> >>>> -- The WA Macintosh User Group Mailing List -- >>>> Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> >>>> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> >>>> Settings & Unsubscribe - >>>> <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug> >>> >>> -- The WA Macintosh User Group Mailing List -- >>> Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> >>> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> >>> Settings & Unsubscribe - >>> <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug> >> >> -- The WA Macintosh User Group Mailing List -- >> Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> >> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> >> Settings & Unsubscribe - >> <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug> > > -- The WA Macintosh User Group Mailing List -- > Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> > Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> > Settings & Unsubscribe - > <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug> -- The WA Macintosh User Group Mailing List -- Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> Settings & Unsubscribe - <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>
