Thank you everyone for your responses. A dealer I spoke to suggested such a cable existed but they didn't have one in stock. However, having read all your responses I decided that if indeed it did exist there was the potential for unpleasant outcomes. I have just returned from a shopping trip with a 2TB WD My Book Studio with Firewire 800 - which raises another question, so I will start a new thread. Regards to all Merv
On 27/04/12 9:03 AM, Daniel Kerr wrote: > 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 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>
