In message: <200903181907.n2ij7k1d042...@fire.js.berklix.net>
"Julian Stacey" <j...@berklix.org> writes:
: Hi,
: Anyone else noticed Belkin Cardbus USB2 adaptors run extremely hot ?
: I've been having weird things happen
: umass errs, g_vfs_done()da0a[WRITE(offset=....,
: length=131072)]error = 5 first errors after a 66G write,
: subsequent errors after just 1G more, (in retrospect when
: truly hot)
: I've built a break out box to check Voltages & Current
: delivered into external USB2 to IDE enclosures,
: just bought another new 250G IDE for another enclosure,
: lots of enclosures & usb2 hub power blocks tried, then I
: remembered this card used to run hot on FreeBSD-6, in this
: Toshiba Satellite S5100-603, & I think BSD + this laptop
: cooked my brothers identical Belkin card too last year.
: The laptop BTW:
: http://www.berklix.com/~jhs/hardware/toshiba/satellite.s5100-603/
: So 2 things:
: FreeBSD-7.1-RELEASE is still cooking by default.
: I recall cardbus can run at 2 different voltages ?
: Well we need to change something to detect that.
: Anyone want to throw me an RTFM URL start point for reading ?
: (Sorry to ask here & not read first, trying to catch a boat ASAP).
Cardbus runs at 3.3V only. There's X.X and Y.Y low-voltage specs, but
nobody seems to implement them. PC Card (the 16-bit version) runs at
3.3V or 5.0V. The usual reason for cards running really hot is too
much current draw over the bus for supplied devices. Many of the
cards have an external power supply that can be used to provide more
power over a path that is made for it rather than exceeding the
CardBus specs to pull the power in over that power bus. Don't know if
this card has that or not...
Warner
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