Index: /trunk/src/VBox/Devices/PC/BIOS/scsi.c
===================================================================
--- /trunk/src/VBox/Devices/PC/BIOS/scsi.c	(revision 55137)
+++ /trunk/src/VBox/Devices/PC/BIOS/scsi.c	(revision 55138)
@@ -429,4 +429,5 @@
                           | ((uint32_t)buffer[2] << 8)
                           | ((uint32_t)buffer[3]);
+                ++sectors;  /* Returned value is the last LBA, zero-based. */
 
                 sector_size =   ((uint32_t)buffer[4] << 24)