Tandberg Data DAT 72, Руководство пользователя

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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.
USB cables
USB cables are available in a variety of lengths. The maximum cable length
is 5 meters. If you need to place a USB device further than 5 meters from
the system, you must use a hub.
Do not use USB cable extenders or couples. These are not recognized or
approved by the USB organization. The USB specification does not allow
their use and they are likely to reduce the reliability of the USB network or
cause it not to work completely.
Internal and external USB devices use the same USB cables.
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# August 2009
USB cables