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- USB2 - Card or Hub?
Re: USB2 - Card or Hub?
I don't know what the power limitations are from the PCI bus, but I suspect "7
or 8" HDs drawing all their power from the USB port would overtax the USB power
lines. A single 5400 RPM, 2.5" notebook HD such as the WD Scorpio draws the
2.5 watt (500mA at 5 V) max allowed via the USB port, and the startup current
required for a Seagate 7200 is 1.1 amps, more than twice the limit.
However, all USB HDs I've used have their own external power supplies, so it
probably won't make any difference.