LaCie d2 Quadra
Quadruple Interface Hard Drive
page
USB Questions & Answers
port.
If you buy a hub, make sure that it supports per-port
switching. This function prevents the entire chain of pe-
ripherals from freezing up if one of them is not working
properly or is down.
Will Hi-Speed USB 2.0 Devices Work On
USB Hubs And Vice Versa?
You can use your Hi-Speed USB 2.0 devices with
USB hubs, but the peripherals will be limited to USB
performance levels.
There are Hi-Speed USB 2.0 hubs that are able to
communicate in three modes: high-speed (480Mb/s),
full-speed (12Mb/s), and low-speed (1.5Mb/s). Hi-
Speed USB 2.0 is backwards compatible, so you will
be able to connect USB devices to Hi-Speed USB 2.0
hubs; however, the USB devices will still maintain their
■
normal performance levels (i.e. 12 Mb/s).
In order to achieve the fast data transfer rates of Hi-
Speed USB 2.0, you must connect your Hi-Speed USB
2.0 device directly to a Hi-Speed USB 2.0 port on ei-
ther a computer or hub.
For more information about the USB interface,
please visit:
www.lacie.com/technologies
TeChNICAl NOTe:
Avoid using USB connectors found on certain pe-
ripherals such as keyboards. These are passive (or
passthrough) connectors that lead to power loss
and unstable operation.
Only use USB cables shorter than 5 meters (ap-
proximately 15 feet). Using longer cables may
cause the peripherals to malfunction due to exces-
sive reduction in electrical signal strength.
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