IMac G5 external FW drives - measuring max connection support
I'm looking for information about the number of external FW HDs that can be connected to the 2 external FW ports on an iMac G5 (2GHzSP). Practical, not theoretical.
I get the basics, and understand the 8w capacity of the iMac G5 to support unpowered external FW 400 devices.
I'm looking for three things -
1) a block diagram of the iMac G5 design, esp. as it has to do with the relationship between the cpu, i/o bus, FW controller, FW PHY & FW port connectors
2) a methodical analysis of the capacity of the iMac G5 to support x number of external FW400 devices that are daisychained and have their own power supplies
3) an analysis on the pros & cons of daisychaining off 1 vs. both of the 2 FW connectors on the iMac G5
Thanks for any information you can point me to.
Ron, you're awesome! I knew all I had to do was wait for daylight to hit Australia and I'd have my answer
Well, as you usual I tried a number of things different instead of one thing at a time and it works, so I don't know what did it. But I changed one of the firewire cables, and I booted them up one at a time (about a full minute apart) instead of all at once.
Looking at the System Profiler I'm not sure who makes the chipset, and the cases are pretty non-descript. But in the profiler the manufacturer for all three happens to read: Prolific PL3507 Combo Device, or just PL3507 Combo Device.
Two of the three are: 1394 ATAPI,Rev 1.00
and the third is: 1394-ATAPI rev1.10
All three drives also list this:
Unit Software Version: 0x10483
Unit Spec ID: 0x609E
Firmware Revision: 0x12804
Well, its working now! If you post this same reply at
http://discussions.apple.com/thread.jspa?threadID=490329
I'll mark you as having solved it.
Thanks!
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