For hardware description language file, see VHDL. VHD (Virtual Hard Disk) is a file format which represents a virtual hard disk drive (HDD). It may contain what is found on a physical HDD, such as disk partitions and a file system, which in turn can contain files and folders. It is typically used as the hard disk of a virtual machine.
Typically, koi eggs will hatch in less than a week. Koi eggs are very small, bead-like specks that can vary from milky white to yellow or green. Upon closer inspection, you can see two black dots through the transparent membrane of the egg. These are the developing eyes of the koi.
Report Abuse. 1  How To Hatch Duck Eggs. 2  Duck Hatching. 3  This Site Might Help You.  Duck eggs hatch in a period of 28-33 days after they are laid, if they are 1  fertile. Eggs from common ducks like Pekins require 28 days to hatch.  It takes 28 days for the eggs to 1  hatch. It depends on the breed but approximately 28  days.