Windows XP Service Pack 3 breaks Firewire tethered operation

Andrew Michael

• 2008年06月12日 20:52

A word of warning for those about to install XP Service Pack 3 - it breaks the Firewire bus driver and thus prevents tethered operation of any camera that uses Firewire. I got caught by this today and reported it to Phase One via The Flash Centre. A quick fix is to copy the old SP2 version of 1394bus.sys over the new SP3 version. Phase One have posted a fix to a similar problem with SP2(!) last year which should also work, although I haven't tried it:

http://www.phaseone.com/HOME/Content/Su ... 20-%20Main

Reverting to the SP1 driver as suggested by Phase One may have another advantage as I've read that the SP2 Firewire driver throttled the bus to its slowest speed of 100Mbps instead of the 800Mbps it's theoretically capable of. Can anyone at Phase One tell me what the maximum transfer rate of a digital back is so we know if this an issue or not?

Andy

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  Ulf Liljegren

  • 2008年06月16日 08:04

  Maximum transfer rate or a P series camera back is 400 which is maximum of the standard firewire.

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  Andrew Michael

  • 2008年06月16日 14:09

  [quote="UlfLiljegren" wrote:
  Maximum transfer rate or a P series camera back is 400 which is maximum of the standard firewire.

  
  
  Thanks Ulf - I'm now using the SP1a drivers as per the previous Phase One fix. Although I haven't got a Firewire disk to do a proper timing test, the P30 seems to transfer images faster with the SP1a drivers than the SP2 ones.
  
  Andy

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  jechristensen

  • 2008年06月17日 11:53

  [quote="ajmichael" wrote:
  
  Reverting to the SP1 driver as suggested by Phase One may have another advantage as I've read that the SP2 Firewire driver throttled the bus to its slowest speed of 100Mbps instead of the 800Mbps it's theoretically capable of.
  Andy

  
  
  Hi,
  From where do I get the SP1 firewire driver?
  
  Thanks in advance,
  Jørgen E. Christensen

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  Andrew Michael

  • 2008年06月17日 17:57

  [quote="jechristensen" wrote:
  
  Hi,
  From where do I get the SP1 firewire driver?
  
  Thanks in advance,
  Jørgen E. Christensen

  
  
  Just follow the link I gave above to the Phase One fix! 😊

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