In a message [EMAIL PROTECTED]:

<< How do you know which external firewire drives are bootable?, i.e., what 
is the technical aspect that makes them bootable? Obviously needs proper ROM 
read and driver load at boot. What do you need to look for, exactly? >>

Generally, "Old World" PCI Mac's lack the ability to detect connected 
Firewire drives during the startup process.

However, depending on how far you want to go with this undetected Firewire 
ROM deficiency of PCI Mac's, the legendary Ryan Rampel has released Xpostfacto 
3.0b2 which claims:

<<XPF 3 includes a "helper disk" option which is meant to permit booting from 
certain devices which would not otherwise be bootable (in particular, 
Firewire drives). The problem with booting from Firewire drives on older machines is 
that the firmware on those machines does not know how to access Firewire. XPF 
3 solves that problem by copying system files from the Firewire drive to a 
"helper" drive. XPF then sets up the boot process so that it starts from the "he
lper", and then switches to the Firewire drive once enough of the system has 
loaded so that Firewire is accessible.

[Snip]>>

See:
http://eshop.macsales.com/OSXCenter/XPostFacto/Framework.cfm?page=XPostFacto3.
html

http://eshop.macsales.com/OSXCenter/XPostFacto/Framework.cfm?page=XPostFacto3.
html#firewire

for the full details.

There may be problems with certain Firewire cards and I'm not sure if you 
need to be in OS 9 or OS X when using Xpostfacto to boot the FW drive. I don't 
have a FW drive to check this out so I cannot offer any "Real World" experience 
-- just some food for thought.

--glen (digest mode)





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