LaCie FIREWIRE 800/400 - Manual (Page 52)

LaCie Biggest Quadra
User Manual page
USB Questions & Answers
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 connec-
tors found on certain peripherals such as keyboards.
These are passive (or pass-through) 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 excessive re-
duction in electrical signal strength.