1.3.3. Virtual Machine Hardware

A OpenVZ virtual machine works like a usual standalone computer.

By default, virtual machines are created with the following virtual hardware:

  • 1 VirtIO SCSI HDD, expanding,
  • 1 CD-ROM (IDE for Windows and Debian guests, VirtIO SCSI for Linux guests except Debian),
  • 1 VirtIO network adapter, bridged,
  • 32MB video card.

Other hardware added to a default VM may depend on the chosen distribution (see Section 2.1.3, “Creating Virtual Machines”).

The complete range of virtual hardware a virtual machine can have is provided in the table below.

CPU

Up to 32

RAM

Up to 256 GB

Video Adapter

VGA/SVGA video adapter with VBE 3.0

Video RAM

Up to 256 MB of video memory

Floppy Disk Drive

1.44 MB floppy disk drive mapped to an image file or a physical floppy drive

IDE Devices

Up to 4 IDE devices:

  • hard disk drives mapped to QCOW2 image files (up to 16 TB each)
  • DVD drives mapped to ISO image files

SCSI Devices

Up to 15 SCSI devices:

  • hard disk drives mapped to QCOW2 image files (up to 16 TB each)
  • DVD drives mapped to ISO image files

Network Interfaces

Up to 15 VirtIO (default), Intel 82545EM, or Realtek RTL8029 virtual network adapters.

Serial (COM) Ports

Up to 4 serial (COM) ports mapped to a socket, a real port, or an output file

Keyboard

Generic USB or PS/2 keyboard

Mouse

Generic USB or PS/2 wheel mouse

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