IBook won't load Firewire drive; "unknown device"

That's the summation via System Profiler. It's a SmartDisk Firelite enclosure but I swapped the old 40 GB drive that failed for a new Seagate Momentus 80 GB drive. My G4 dualie recognizes the new SmartDisk setup fine. It loads immediately and I was able to access via all the utilities. Transfers work well.
But on the 1.33 iBook the green light appears on the SmartDisk enclosure, but no threat of loading. Only System Profiler identifies something, "unknown device" with 400 capability. When I remove the firewire cable, System Profiler doesn't see anything.
I had no trouble with the SmartDisk prior to the old drive failing. It worked perfectly on the iBook. My firewire port appears to be okay, since I tried Target Disk Mode with the two computers and it worked well.
Any suggestions would be greatly appreciated. I Googled and found many issues of "unknown device" related to firewire drives, but none that seemed to precisely fit this case, a drive that was recognized on one computer but not another. Both are running 10.4.11.

I'm still baffled but tonight I found an acceptable alternative, a Macally 250 Firewire/USB enclosure that I had in my closet but never used previously. The Seagate drive loads on both the dualie and iBook using that enclosure, which is bulkier than the SmartDisk but right now I don't really care.

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    What is happening? Is my G5 desktop corrupting the drives as it writes to them? It clearly has something to do with how my computer is interacting with these FW drives. Is it a firmware issue?
    I am under a pressing deadline, and can't let go of this desktop for service for over a week right now.
    Any suggestions much appreciated! I'm desperate to get this going!
    Thanks!

    Hi Tom,
    Thanks for the feedback. In all cases, I've been using FW drives on their own, not daisy changed. I've tried multiple FW cables as well to confirm that it is not the cables. These 3 different drives I've had problems with each have their own separate power supply, so I don't think that's the issue.
    I'll try running a copy of DiskWarriror.
    However, if it's an issue of directories on the drive, wouldn't the FW Drives not work on ALL computers? Why would it function fine on any computer other then my desktop?
    Any more thoughts would be much appreciated!
    Thanks,
    Max

  • I have a iBook G4 i can git to the login screen but enter password and it gose to a blue sceen then right back to the login sceen and won't load

    My iBook won't load the desktop after puttong in my password it keeps going back to the login screen anyone have any ideas on how to fix this
    Allan

    Hello,
    In most cases resetting the PMU helps.
    Here is an article on troubleshooting, which you may find helps you.
    http://support.apple.com/kb/TA25686?viewlocale=en_US&locale=en_US
    Best of luck

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