Two-Spindle System

What Does Two-Spindle System Mean?

A two-spindle system is an ultra-slim notebook computer design. It has two internal storage devices, an integrated hard drive and an optical storage drive – such as a DVD, CD-RW or CD-ROM drive. Larger notebooks may be designed with three spindles to accommodate an internal hard drive, optical drive or floppy drive.


A two-spindle system is also known as a twin-spindle system.

Techopedia Explains Two-Spindle System

When a second internal drive is installed in a two-spindle system, it is swapped with one of the permanent hard drives (such as the CD-ROM or DVD drive), which is placed in a removable drive bay.

Because a notebook computer’s size, mass and cost are reduced in two-spindle systems, they are popular with users.

Floppy disk drives were prevalent from the mid-1970s to the late-1990s but are used on a limited basis in modern computing (such as legacy industrial computer equipment). Floppy disk drives have been replaced by external hard drives, Universal Serial Bus (USB) flash drives, optical disks and networks with multiple local and cloud storage resources.


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Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.