In Reply to: Re: USB 2 external HD problem posted by Bill D. on 06/10/02 at 12:53 AM:
: Every reputable USB 2.0 Cardbus adapter I've seen requires an AC adapter to work properly.
: You get what you pay for. :-(
Why? If the current is sufficient for USB 1.1? Does USB 2 require more?
: : : Are you sure you have the latest "Enhanced" USB 2.0 driver? You don't have a B1 or B2 designation, do you? Those are Beta. Go to Windows Update to be sure. If you must, manually update the driver and "Display a list". Select the non-"B" driver.
: : The drivers are the latest from the manufacturers' website. or are you referring to Microsoft drivers? I thought MS don't do USB 2 drivers for Windows 9x? Either way, no "B" designation anywhere.
: : : USB 2.0 cardbus adapters also require a power supply externally - especially on a laptop.
: : The adapter has no power supply but the hard drive has a hookup to the PS2 port. Anyway, that would not explain why USB1 works fine and USB2 doesn't?
: : : Yes - USB is hard-wired to sound and video, but Cardbus adapters may not be. It differs from laptop to laptop.
: : I have managed, through Safe Mode, to assign the USB 2 enhanced host controller to a spare IRQ but the USB 1 Open Host controllers refuse to go there, displaying the infamous yellow exclamation marks. If I have USB 2 on IRQ 5 or 9 (the spare ones) and USB 1 (the cardbus external ports) sharing IRQ 11, Device Manager reckons everything works fine but the HD is chained to USB 1.1 (and works fine there) not USB 2. I assume that it because the whole thing hangs on the cardbus and therefore has to share the cardbus IRQ to work, or is that wrong?
: : : : I have bought an external USB 2 HD and a USB 2 PCMCIA card for my laptop, a Toshiba Satellite 4090 running Windows ME.
: : : : The drive works fine with the built-in USB 1.1 port. On the cardbus USB 2.0 port, it will work for a few minutes, then it is disconnected and Windows asks me to insert a disk in removable drive D. When disconnected and reconnected, the same thing happens.
: : : : I've read most of the old messages here and have tried the following:
: : : : update BIOS, reinstall Windows with p\i options, reassign IRQ for USB 2 manually (USB 2 no longer recognised though USB 1.1 works on card), disable serial ports to free IRQs etc.
: : : : All USB ports are always assigned IRQ 11, sharing with video, sound, PCMCIA and infrared port. Reassigning them seems impossible as they're hardwired together, and reassigning the USB ports of the cardbus card in Safe Mode works for USB 2.0 but not USB 1.
: : : : USB mouse works fine on the PCMCIA ports. The USB controllers are Intel for the built-in one, NEC for the cardbus ports.
: : : : Any ideas?