Introduction

The Power Mac G4 MDD Supports four IDE hard drives in two separate drive cages on two different IDE channels (the computer has three IDE channels for six IDE drives total).

Pièces

Aucune pièce nécessaire.

The Power Mac G4 MDD: the last, and the fastest G4-based Mac.  This computer boasted up to a Dual 1.42GHz PowerPC G4 CPU (though I have a single 1.25GHz). Six USB ports.
  • The Power Mac G4 MDD: the last, and the fastest G4-based Mac. This computer boasted up to a Dual 1.42GHz PowerPC G4 CPU (though I have a single 1.25GHz).

  • Six USB ports.

  • Four FireWire ports.

  • Assorted SCSI (SCSI50/SCSI68)

  • Assorted Audio

  • Video (ADC & DVI)

  • Networking (RJ-45 Ethernet/56k Modem)

  • Some later model MDD's (such as the dual 1.42GHz) Have a FireWire 800 Port Here:

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Pull on the side lever and lower the side of the case. Pull on the side lever and lower the side of the case. Pull on the side lever and lower the side of the case.
  • Pull on the side lever and lower the side of the case.

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The hard drive cages are located here.
  • The hard drive cages are located here.

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Cage 1 Start by removing this screw. Remove the IDE ribbon cable from the motherboard.
  • Cage 1

  • Start by removing this screw.

  • Remove the IDE ribbon cable from the motherboard.

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Now, remove the power connecton from the drives. Now, remove the power connecton from the drives.
  • Now, remove the power connecton from the drives.

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Now, push this tab down, and pull the cage towared you. Now, you can set cage 1 aside. Now, you can set cage 1 aside.
  • Now, push this tab down, and pull the cage towared you.

  • Now, you can set cage 1 aside.

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Cage 2: Remove this Phillips screw:
  • Cage 2:

  • Remove this Phillips screw:

  • Disconnect this IDE ribbon cable from the logic board.

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It's likely that there is a cable clip holding the ribbon cable to the case. To remove it, push the end, and it should pop up.
  • It's likely that there is a cable clip holding the ribbon cable to the case.

  • To remove it, push the end, and it should pop up.

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With the clip free, pull on this tab, lift the cage up, until it clicks, and pull it away. Now, set the cage on top of the CPU, and remove the power connectors. Now, set the cage on top of the CPU, and remove the power connectors.
  • With the clip free, pull on this tab, lift the cage up, until it clicks, and pull it away.

  • Now, set the cage on top of the CPU, and remove the power connectors.

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Once the cables are free, set the drive cage aside. To remove the hard drives from the cages, remove the four screws on the sides of the cage that are connected to the drives, than slide the drives out.
  • Once the cables are free, set the drive cage aside.

  • To remove the hard drives from the cages, remove the four screws on the sides of the cage that are connected to the drives, than slide the drives out.

  • The two cages are cross compatible and can be put in either rack.

  • The MDD does not have a 128GB drive limit like older macs, My MDD has 3 Drives (A 400GB Hitatchi Deskstar, 40GB Seagate Baracuda 7200.7, and a 30GB Quantum Fireball LCT).

  • Note the ID jumpers on the two drive set. One is set to Master, the other to slave. A single drive can be set to Cable Select.

Thanks - excellent tutorial!

Question: If you have a single internal drive, and a connected extrenal drive via firewire or usb, what jumper setting should be set for the internal drive and the external drive? Booting into Mac OS 9 natively (not via Classic) on the internal drive seems to be sensitive to the jumper settings and I’m having issues getting it to work.

LTG Seb - Réponse

Conclusion

To reassemble your device, follow these instructions in reverse order.

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Chris Green

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