Firewire External Harddisk

[gm c]

> >
> I've been following this thread off and on for a while.  As a user
> of a 
> number of different IEEE1394 drives from various manufacturers
> (more 
> than a dozen at last count) and IEEE1394 PCI cards (an X86
> IEEE1394, an 
> X86 IEEE1394A, a Mac IEEE1394B, a Mac IEEE1394A and an older Mac
> which I 
> suspect is IEEE1394), I find that problems under ubuntu tend to
> depend 
> on the PCI card/drive manufacturer combination.  I have two drives
> that 
> won't talk to ubuntu with any of the cards I have, but will talk to
> 
> MacOSX just fine.  All the IEEE1394B (i.e., Firewire 800) drives I
> have 
> will not be detected by ubuntu unless there is a IEEE1394 (not 
> IEEE1394A) compliant drive on the bus.  IEEE1394A, and IEEE1394
> drives 
> will be detected by IEEE1394A pci cards reliably.  Mixing 1394A
> drives 
> with 1394 drives on a 1394 controller results in spotty detection
> but 
> having a single drive of either type seems to work reliably.
> 
> Now, since all the the drives I have (they all have ext3 partitions
> as 
> well as Mac partitions), work on all of the MacOSX machines, the
> only 
> conclusion I can draw is that IEEE1394 driver in the kernel is not
> as 
> robust as the Mac kernel when it comes to the initial sbp2
> negotiations 
> with various versions of IEEE1394 implementations in the drives. 
> Since 
> I'm lucky enough to have a selection of drives I have reliable
> detection 
> on all my machines under hoary at the moment.   It does make it 
> difficult to move the drives around to transfer information
> however.
> 
> Hope this might help some of the people trying to get Firewire
> drives 
> hooked to their hoary systems.
>     G++
> 
> -- 
> Gavin Hemphill	

Thank you for your input. 
It sounds to me like the IEEE1394 driver could use some fine tuning.
For those who are not getting it recognized at all- list all 1394
module names in /etc/modules to insure they get loaded. Then plugin
externel devices several times to see if they are recognized or not. 
If they are not, then the problem will be with hotplug or udev. Both
of these have config files to control operation. Maybe they need to
be modifyed. I have not had trouble with udev or hotplug so havent
the experience to recommend any mods.
good luck
mike
	
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