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Message-ID: <004401c3050d$b7177f30$c2020c0a@jbaker1200>
From: "Jeff Baker" <jbaker AT qnx DOT com>
To: <cygwin AT cygwin DOT com>
Subject: CompactFlash Disk Geometry
Date: Thu, 17 Apr 2003 14:18:15 -0400
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The following piece of code is trimmed down but shows the basic
functionality of getting the geometry of a disk.  When I build this code in
VC I can get correct values for Removeable Media (SmartMedia, CompactFlash),
but when I build it under Cygwin the DISK_GEOMETRY structure is only
partially correct.  I understand that this might be a problem for a mingw
mailing list, but I don't know where such a list might be so I'm starting
here first.  I've only tested this code on Windows XP and Windows .Net
Server 2003 RC2.

The code outputs:
VC:    15680 1 1 512
Cygwin:    15680 0 1 1

"\\\\.\\F:" in this case is an 8M CompactFlash card in a PCMCIA adapter, in
a PCI Ricoh CardBus adapter.

#include "windows.h"
#include "winioctl.h"

int main(void) {
    HANDLE hnd;
    DISK_GEOMETRY geo;
    DWORD rbc=0;

    hnd = CreateFile("\\\\.\\f:", GENERIC_READ|GENERIC_WRITE,
FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
    if (hnd == INVALID_HANDLE_VALUE) {
        return 1;
    }

    memset(&geo, 0, sizeof(DISK_GEOMETRY));

    if(!DeviceIoControl(hnd, IOCTL_DISK_GET_DRIVE_GEOMETRY, NULL, 0, &geo,
sizeof(geo)+20, &rbc, NULL)) {
        return GetLastError();
    }

    printf("%d %d %d %d\n", geo.Cylinders, geo.TracksPerCylinder,
geo.SectorsPerTrack, geo.BytesPerSector);

    CloseHandle(hnd);
    return 0;
}



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