Gary R. Van Sickle wrote:
[snip]
NOTE: A digital camera shows up as an USB drive, i.e. a DOS
drive -> e.g. /cygdrive/<next free letter> - and is available
so long as the camera stays ON (it eventually WILL go OFF
after last use, just as your screen blanker! Depending on how
you've set it or use it.)
A USB Mass Storage Device that does this is poorly designed at best, and
probably not compliant with the USB specification. I can't recall a
situation where a device is allowed to just "disappear" once plugged in and
enumerated without the user doing something (a bus-powered device anyway).
You should see if there is a firmware upgrade available for it.
Then again, I know firsthand that Microsoft had USB Mass Storage pretty
wildly wrong as late as the release of XP SP...2 I think, maybe 1, so who
knows, could be MS's fault.
Most cameras have an auto-off function to preserve battery power. I do
not think any of them are actually usb powered when plugged in. I know
that mine will NOT function without charged batteries in it even when
plugged into a port. I suppose that if a camera has the means to turn
off the auto-shutoff function then it will not disappear until the
batteries fail, whereupon it will act like any other externally powered
USB device and become unaccessable. I believe that some cameras come
with an external power adapter that will provide continuous power.
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