Instead of working with a file on a disk that's managed by the host, the VM works directly with a disk. Passthrough disks enhance VM performance by omitting a layer of abstraction in the file system. If you're going to use passthrough disks for VMs that support virtual desktops, here are some pointers to get the most out of the technology. To run VMs on the machine on which I'm typing, I had to spend the money to get a whopping 8 SATA ports. For instance, servers are designed to support more physical disks than desktop machines by default. They can improve VM performance but also come with some challenges in a virtual desktop environment. Does anyone have any idea what those two (presumed) nickel-coated neodymium magnets are for? Fine positioning? I'm just really curious because it looks really cool.Passthrough disks connect to the virtual machine (VM) and serve as a storage source with an existing file system and disk file format. If it's a writer-laser you may see something as your retina burns out. If it's infrared you won't see it until you don't see anything. With lasers don't sit around with a power supply trying to make a laser come on. Does anyone know where to buy these (stepper motor + lead screw assembly)? They're a beautiful design - I'd like to build a 9x9cm 2-axis plaster-of-paris (google for local name) engraver for metal casting. Parts of the housing are aluminum, others are (I think) mild steel, based on their magnetic behaviour. The magnet is connected directly to the threaded rod, although the rod does not carry the magnetic field. I've never seen a motor of this design before. I've just taken apart one of the "Stepper Motors" and it consists of a cylindrical magnet surrounded by two highly-wound coils, one around (I'm presuming) each pole. (Motion control, anyone?) I can't remember if they can hold a load in position like a stepper. DC motors with high-resolution encoders (I've found more in printers than CD/DVD drives) with appropriate control firmware give more control than the small stepper motors or hobby servos, plus, assuming there isn't too much friction, you can record movements from the encoder/controller, and play them back.
A few notes based on recent research and experience : 1. I've just learned the right way on the fourth CD Writer I've disassembled, but your instructable has clarified several points.
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