Re: [WIN] GetLogicalDrives returns drives NOT present
Bernie Ryan wrote:
>
> Dan Moyer wrote:
> >
> >
> > When I wrap the function GetLogicalDrives, it works, except that it
> > returns drive numbers for drives that aren't actually there yet, exactly as
> > "My Computer" does, ie, usb drives that aren't currently plugged in. And
> > then
> > if I use "dir" to see if a drive is "ready", I get a non-fatal error
> > message.
> >
> >
> > What I was trying to do was find out what drives are on the system, and then
> > if they were removable or not. But I don't want to check drives that aren't
> > actually there.
> >
> > Any suggestions??
>
> Dan:
>
> Be sure that you unmount the USB drives before you remove them.
>
> Windows when it loads assigns the drive numbers when it boots
>
> and when you remove a USB drive it's drive number does not go
>
> away.
>
> You did't say what operating system you are using which may make a
>
> difference.
>
> Here is a link that might help:
>
> <a
> href="http://www.uwe-sieber.de/usbstick_e.html">http://www.uwe-sieber.de/usbstick_e.html</a>
>
> Bernie
Thanks for the observation & link Bernie.
I'm using WinXP, and 4 different "removable drives" have shown up as present,
as far as I remember, from first time I turned on the system, before ever
mounting
any usb flashdrives. Those are the drives that show up from GetLogicalDrives.
Any time I mount a usb drive, I unmount it via the "safely remove hardware"
icon in systray, which is currently showing those same 4 not actually present
drives; when I do mount a usb flash drive, it shows up also, and then
dissappears from the "safely remove hardware" list after I click there to unmount
it.
So my problem *seems* (?) to be, how to discern if a drive that is asserted
by the system to be "there" is actually "ready" or not. I thought to use
"dir" to test that, but it brought up non-fatal errors which required user
clicks in a message box to continue, which is not desireable.
Dan
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