USB 2.0, USB1.0, USB1.1 Speeds
The USB 2.0 specification is an extension of USB 1.1 and is backward compatible with USB 1.1. USB supports data transfer rates of 480MBs per second. USB 2.0 and 1.1 devices use the same cables and connectors.
You may hear USB 2.0 referred to as Hi-Speed USB. There are actually two specifications. The USB 2.0 specification supports three speeds: 480 Mbps and the previous USB 1.0 and 1.1 speeds of 12 Mbps, and 1.5 Mbps. Hi-Speed USB, on the other hand, supports just the 480 Mbps portion of the USB 2.0 Specification.
The DL580 G3 will let you use the USB drive key device for:
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Driver updates during Windows 2000 and 2003 installations if formatted as a 1.44MB floppy.
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Booting as a 1.44MB floppy or as a mass storage device
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Loading scripted images during the boot process
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Downloading firmware flash components
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Flashing firmware