Power-Up In Standby

What Does Power-Up In Standby Mean?

Power Up in Standby (PUIS) is a specific hard disk drive (HDD) feature that allows the drive to spin up only when necessitated by a command, rather than when turning on the computer. This helps save energy or allows staggered spin-up times for multiple disk drives.


Techopedia Explains Power-Up In Standby

The implementation of PUiS requires input from the basic input/output system (BIOS). This system, which is a fundamental part of the PC and other types of hardware, helps users identify and control various commands that enable or disable features like PUiS. Experts have noted that PUiS has traditionally been most commonly used in systems that include multiple disk drives.

The principle behind PUiS is that device owners and users can save a lot of energy if the disk is not spinning when not required. This is an essential type of energy saving control for smaller devices or other energy-efficient devices. The emergence of other technologies, like solid state drives, are an alternative to the issue of power required to spin disk drives for input and output.


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Margaret Rouse

Margaret Rouse 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 explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…