--- bc3e3636a3b8180cf1c04bd5ea44e37de1a92543
+++ c4103bef41b59cc8988be725fa74822bba9e5d5d
@@ -914,8 +914,7 @@ static int resp_start_stop(struct scsi_c
 static sector_t get_sdebug_capacity(void)
 {
 	if (scsi_debug_virtual_gb > 0)
-		return (sector_t)scsi_debug_virtual_gb *
-			(1073741824 / scsi_debug_sector_size);
+		return 2048 * 1024 * (sector_t)scsi_debug_virtual_gb;
 	else
 		return sdebug_store_sectors;
 }