IPod + Hard Drive disappear upon launch

Every time I launch iTunes, as soon as my iPod syncs it "ejects" itself and disappears. This makes changing which playlists to include an arduous process that has to be timed very delicately.
I'd been dealing with it, though, until I relocated my music to a new external hard drive. Now whenever I launch iTunes, both the iPod and the hard drive eject almost immediately. The hard drive gives me the "device removal" message as if it had simply been unplugged. Sometimes it lets me reconnect them after a few minutes, but other times I have to play with it for a while to get my devices to reconnect.
I've been having the problem overall for about a year now, and updates to the iTunes software haven't helped.

IMHO, using a windows utility to defrag something like an ipod, with it's own OS running at the same time, is asking for trouble. The defrag program will likely touch and maybe move most of the data on the disk, possibly including data used by the ipod's OS. If it zigs while the OS is zagging then blooie, the ipod will crash.
How to decide if the ipod is fragmented is another issue. If you do suspect\decide that the ipod's drive is fragmented then it seems to me that the safest way to defrag the thing would be to restore it using the ipod updater, then let itunes reload it completely. This should clear off the disk and resave each file in a sequential manner, which will have the effect of defragging the drive.
5G 60GB Black iPod   Windows XP Pro  

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    Hello Helpful Folks,
    I recently installed an addional internal Hard Drive, and an additional 1GB SDRAM. This worked great for a day, but the next morning, after powering up, system was extremely sluggish, and after much deadline-induced impatient problem solving, has gone from bad to worse (system refuses to acknowledge existence of internal Hard Drives). I apologize in advance for the length of this post, but as
    the devil is in the details, I figure too much info is better than not enough.
    Following is a breakdown of my system: AS IT LAST WORKED; RECENT UPGRADES; and MY LAME ATTEMPTS AT PROBLEM SOLVING THAT HAVE MADE THINGS WORSE. Please don't interpret my all caps as shouting, just trying to organize this post for better clarity.
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    Power Mac G4 "Quicksilver" 2001
    867 PowerPC G4, 256 L2, 2MB L3
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    -1 Pioneer "Superdrive" DVD-R/W/CD-R/W on Internal ATA 0 ID=0
    -NVIDIA GeForce2 MX with 32MB SDRAM in AGP Slot, feeding a 17" Apple Studio Display.
    -PCI Display Card "formacGA7" - not attached to any external device, not sure what its intended purpose is.**
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    -OEM Keyboard attached to Monitor's rear USB port.
    -Microsoft 3 Button Wheel mouse with "IntelliEye" (wheel is 3rd Button) connected to Keyboard USB port (right side).**
    -2 OEM FireWire (400) ports
    -2 OEM USB (1) ports
    Peripherals that have worked in various configurations with this system over the past 3 years:
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    -1 Canon GL1 MiniDV camera, attached either to the other FireWire port, or to the last drive in the chain, depending on my urgency/laziness factor. BTW, FCP 3 has worked flawlessly controlling this Cam for logging and Batch Capturing.
    Applications on System Hard Drive that I have OEM CDs for:
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    -DiskWarrior (version unknown, purchased from Alsoft in 2003)
    -OWC Intech Hard Disk SpeedTools ver 3.5
    Other CDs I have:
    OEM CDs for Power Mac G4:
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    -Software Install, OS 10.0.4, CD vers 1
    -Software Restore, OS 9.2 & 10.0.4 CDs vers 1, Discs 1-4 of 4.
    -OEM Apple Hardware Test; Power Mac G4, SW vers 1.2.1
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    -QuickTime Player 6.0.2
    -Toast Audio Extractor 1.1
    -Toast Titanium 5.0.2
    Applications on system Hard Drive I use if my wife is busy on our Windows XP machine:
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    -Microsoft Word & Excel
    # of other Applications on System Hard Drive I either don't use or may be integral to the system: 260
    # of Control Panels:
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    -Disabled: 0
    # of Extensions:
    -Enabled: 174
    -Disabled: 0
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    -Bought a copy of MacDrive so I can see what's on my External Drives on the XP machine.
    -Printed out System Profile before I installed upgrades.
    -Thoroughly searched this discussion board for and gathered as much info as I could before upgrading.
    Dumb things I did:
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    -Didn't keep any sort of separate log of what's on the External Drives.
    -Never ran any sort of Disk Maintenance, even after one of the Externals crashed (DiskWarrior saved my butt on that).
    -Ignored some of the advice on this discussion board.
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    RECENT UPGRADES:
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    -Installed 1 Maxtor "DiamondMax" Ultra ATA/133 100GB Hard Drive (8 MB buffer) as "Slave" (no jumper) in top of U-Carrier above System Hard Drive; attached to middle of original Apple ribbon cable, attached available power plug.
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    A few hours later, I plugged the MiniDV and an External Drive into the FW ports and powered up the System. It was behaving extremely sluggishly. I would click on something, the pointer would turn into a wristwatch (sometimes with the minute-hand moving, sometimes not) and like an actual minute later, what I'd clicked on would open. All three drives were on the desktop, still had their files, and "About this Mac" still showed 1.5GB total Memory. So I powered down, disconnected the FW devices, waited a bit, and powered back up. Same sluggish response. I tried to open my FCP project file, and instead got a Window that said something to the effect of "The Application associated with this document could not be found". I think I tried to open FCP from the Applications folder on the System Drive and got the same message (I'd only had 3 hours sleep, no coffee, my client had died, and his family was coming for whatever I had in a few hours).
    LAME ATTEMPTS AT PROBLEM SOLVING THAT HAVE MADE THINGS WORSE
    Panic had set in, which never solves anything, so I don't remember what order I performed which tasks, between searching for clues in this forum, and convincing myself that that would be faster than trying to compose a question, waiting for a response, etc.
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    The Quick Silver is still powered down. I removed the Microsft mouse and replaced it with the OEM Apple mouse. I opened the case, and removed the PRAM/Backup battery (manufacture date: July 2001). Couldn't find my voltmeter, so took the bat to Radio Shack and bought a new one. Had the Radio Shack guy test the old one: it showed 3.69 volts still. Have not installed the new battery yet. The case is still open, waiting for any advice any of you might have to offer.
    Thank you all so much for your patience in perusing and pursuing this.
    Sincerely,
    Patterson
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    Thank you Rodney and John,
    The jumpers are correct for both Maxtor Drives.
    Rodney, you are correct in that the initial problem (slow rendering/"out of Memory" crashes) was caused by my not realizing I'd stupidly captured several GBs of media to my system drive, and not checking which drives those files were on (as I'd assumed I'd put them on one of my external media drives) once that problem presented itself.
    Before I'd determined what I'd done, I bought the extra RAM. After I'd found the media files on the System Drive, and saw that my dedicated media drives were too full to easily move them, I decided to buy an additional Internal drive so that I could:
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    -Juggle all my media into a more organized fashion for archiving (as most of my projects are on-going long-term affairs)
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    Copying the Media files onto the New Drive and moving the System Drive's Media files into the Trash worked great: huge improvement in Rendering, etc.
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    I powered down, removed the Ribbon and Power cables from the original "Master" drive, reinstalled the Jumper on the New Drive as "Master", plugged the End of the Ribbon and the Power cables into the New "Master" drive and powered up. The screen went to the "?" within 20 seconds instead of 4+ minutes, and no more "buzzing".
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