Hi,
raw harddisk access for Windows (//./PhysicalDrive0) gives wrong disk sizes.
You can check this by booting a harddisk with the GRUB bootloader installed
and using GRUB's geometry command.
The current QEMU code uses IOCTL_DISK_GET_DRIVE_GEOMETRY which is marked
as obsolete by MS.
The appended patch gives correct results. Please apply it to CVS.
Stefan
Description of block-raw.patch:
* replace IOCTL_DISK_GET_DRIVE_GEOMETRY by IOCTL_DISK_GET_DRIVE_GEOMETRY_EX
Index: block-raw.c
===================================================================
RCS file: /sources/qemu/qemu/block-raw.c,v
retrieving revision 1.24
diff -u -b -B -r1.24 block-raw.c
--- block-raw.c 21 Sep 2007 06:09:39 -0000 1.24
+++ block-raw.c 19 Oct 2007 19:53:48 -0000
@@ -1174,7 +1174,7 @@
BDRVRawState *s = bs->opaque;
LARGE_INTEGER l;
ULARGE_INTEGER available, total, total_free;
- DISK_GEOMETRY dg;
+ DISK_GEOMETRY_EX dg;
DWORD count;
BOOL status;
@@ -1190,11 +1190,10 @@
l.QuadPart = total.QuadPart;
break;
case FTYPE_HARDDISK:
- status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY,
+ status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
NULL, 0, &dg, sizeof(dg), &count, NULL);
- if (status != FALSE) {
- l.QuadPart = dg.Cylinders.QuadPart * dg.TracksPerCylinder
- * dg.SectorsPerTrack * dg.BytesPerSector;
+ if (status != 0) {
+ l = dg.DiskSize;
}
break;
default:
