User`s guide

Appendix B USB Configuration Guide
Setting Up a USB Network
Quantum DAT 320 User’s Guide 46
USB specification a device supports. A USB 2.0 logo-ed device correctly
supports high, full, and low speed data transfer.
Setting Up a USB Network
USB is very user friendly. The interface automatically assigns addresses
to devices; you simply need to connect a USB device to a USB port on a
system using a USB cable. If you have many USB devices or need to
place a device away from your system, you may place up to a maximum
of five USB hubs between the device and host system and connect them
with additional cables.
If you are using a high-speed (USB 2.0) device, make sure that the USB
host at the system and all the hubs between the device and host
support high-speed (USB 2.0) transfer.
When using a bulk transfer device, such as a tape drive, do not use
other USB devices that will place restrictions on the USB bandwidth
available to the bulk transfer device.
If several USB device requiring large amounts of the USB network
bandwidth are to operate simultaneously, an additional host must be
added to the system. Each device must then be placed into the separate
networks starting at the different hosts. An additional host is typically a
new USB HBA, which plugs into the host system’s PCI slot, creating a
new USB host that resides on the network.
Note: If several USB adapters are placed into a system, demands on
the bandwidth of the system bus will constrain the USB
devices’ performance.
Always use USB logo-ed components in your USB network. This is the
best and easiest method to ensure reliable operation.