[ekohl] 54505: [FREELDR] PcDiskGetDriveGeometry: Try to retrieve the extended disk geometry first.

Author: ekohl
Date: Sun Nov 27 10:00:24 2011
New Revision: 54505

URL: http://svn.reactos.org/svn/reactos?rev=54505&view=rev
Log:
[FREELDR]
PcDiskGetDriveGeometry: Try to retrieve the extended disk geometry first.

Modified:
    trunk/reactos/boot/freeldr/freeldr/arch/i386/pcdisk.c

Modified: trunk/reactos/boot/freeldr/freeldr/arch/i386/pcdisk.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/arch/…
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/arch/i386/pcdisk.c [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/arch/i386/pcdisk.c [iso-8859-1] Sun Nov 27 10:00:24
2011
@@ -302,11 +302,24 @@
 BOOLEAN
 PcDiskGetDriveGeometry(UCHAR DriveNumber, PGEOMETRY Geometry)
 {
+  EXTENDED_GEOMETRY ExtGeometry;
   REGS RegsIn;
   REGS RegsOut;
   ULONG Cylinders;
 
   TRACE("DiskGetDriveGeometry()\n");
+
+  /* Try to get the extended geometry first */
+  ExtGeometry.Size = sizeof(EXTENDED_GEOMETRY);
+  if (DiskGetExtendedDriveParameters(DriveNumber, &ExtGeometry, ExtGeometry.Size))
+  {
+    Geometry->Cylinders = ExtGeometry.Cylinders;
+    Geometry->Heads = ExtGeometry.Heads;
+    Geometry->Sectors = ExtGeometry.SectorsPerTrack;
+    Geometry->BytesPerSector = ExtGeometry.BytesPerSector;
+
+    return TRUE;
+  }
 
   /* BIOS Int 13h, function 08h - Get drive parameters
    * AH = 08h