Specifications

For additional information about the FireWire interface and the Apple API for FireWire device control, see the

references shown in FireWire Interface (page 67).

Target Disk Mode

The user has the option at boot time to put the computer into a mode of operation called Target Disk Mode

(TDM). When the Power Mac G5 computer is in Target Disk Mode and connected to another Macintosh computer

by a FireWire cable, the Power Mac G5 computer operates like a FireWire mass storage device with the SBP-2

(Serial Bus Protocol) standard. Target Disk Mode has two primary uses:

●

high-speed data transfer between computers

●

diagnosis and repair of a corrupted internal hard drive

The Power Mac G5 computer can operate in Target Disk Mode as long as the other computer has a 1394a or

1394b FireWire port and either any version of Mac OS X or Mac OS 9 with FireWire software version 2.3.3 or

later.

To put the Power Mac G5 computer into Target Disk Mode, restart the computer and hold down the T key until

the FireWire icon appears on the display. Then connect a FireWire cable from the Power Mac G5 to the other

computer. When the other computer completes the FireWire connection, a hard disk icon appears on its

desktop.

If you disconnect the FireWire cable or turn off the Power Mac G5 computer while in Target Disk Mode, an

alert appears on the other computer.

To take the Power Mac G5 out of Target Disk Mode, drag the hard disk icon on the other computer to the trash,

then press the power button on the Power Mac G5 computer.

Ethernet Port

The Power Mac G5 computer has a built-in Ethernet port that supports 10/100/1000 Mbps transfer rates. In

operation, the actual speed of the link is auto-negotiated between the Ethernet PHY device that is internal to

the K2 IC and the bridge, router, hub, switch, or other Mac or PC to which it is connected. The Ethernet port is

auto-sensing and self-configuring to allow connection via either a cross-over or straight-through cable.

Both CAT 5 unshielded twisted pair (UTP) and shielded twisted pair (STP) cables work with the Ethernet port.

An STP cable is recommended for noisy environments or run of greater than 100 meters.

Input and Output Devices

Ethernet Port