Recommended Minimum Cage Sizes: 1  Minimum size for 1 parakeet = 20â³ long x 18â³ deep x 18â³ high (Volume = 6,480â³ cubic inches). 2  Minimum size for 2 parakeets = 30â³ long x 18â³ deep x 18â³ high (Volume = 9,720â³ cubic inches) We offer this size to our budgie parakeet adopters â please see our bird supplies page for details. Minimum size for 2 parakeets = 30â³ long x 18â³ deep x 18â³ high (Volume = 9,720â³ cubic inches) We offer this size to our budgie parakeet adopters â please see our bird supplies page for details.
The most popular is a parallel ATA interface. A Optical drive is hardware that read and drive a DVD disk or programs. An optical drive is a drive that reads media in your computer. This  includes a disk drive, a CD , DVD, or Blu-Ray drive.   A device for reading discs on which data is stored.
Data on optical discs is less dense, and the mechanisms for reading it are different. Optical drives, similar to hard drives, also have a small amount of built in memory, but because data on a disc is nowhere near as dense (or numerous), cache is usually very small and not terribly important for you to know. In order to understand how the optical drive works, you need to know how an optical disc works.