It has been suggested that this article be merged with Reboot. (Discuss) Proposed since February 2024.
Power cycling is the act of turning a piece of equipment, usually a computer, off and then on again. Reasons for power cycling include having an electronic device reinitialize its set of configuration parameters or recover from an unresponsive state of its mission critical functionality, such as in a crash or hang situation. Power cycling can also be used to reset network activity inside a modem. It can also be among the first steps for troubleshooting an issue.
Power cycling can be done manually, usually using a switch on the device to be cycled; automatically, through some type of device, system, or network management monitoring and control; or by remote control; through a communication channel.
In the data center environment, remote control power cycling can usually be done through a power distribution unit, over TCP/IP. In the home environment, this can be done through home automationpowerline communications or IP protocols. Most Internet Service Providers publish a "how-to" on their website showing their customers the correct procedure to power cycle their devices.
Power cycling is a standard diagnostic procedure usually performed first when the computer freezes. However, frequently power cycling a computer can cause thermal stress.[1]Reset has an equal effect on the software but may be less problematic for the hardware as power is not interrupted.
Historical usesedit
On all Apollo missions to the moon, the landing radar was required to acquire the surface before a landing could be attempted. But on Apollo 14, the landing radar was unable to lock on. Mission control told the astronauts to cycle the power.[2] They did, the radar locked on just in time, and the landing was completed.[3]
During the Rosetta mission to comet 67P/Churyumov–Gerasimenko, the Philae lander did not return the expected telemetry on awakening after arrival at the comet. The problem was diagnosed as "somehow a glitch in the electronics", engineers cycled the power, and the lander awoke correctly.[4]
During the launch of the billion dollar[5]AEHF-6 satellite on 26 March 2020 by an Atlas V rocket from Cape Canaveral Air Force Station, a hold was called at T-46 seconds due to hydraulic system not responding as expected. The launch crew turned it off and back on, and the launch proceeded normally.[6]
In 2023 the Interstellar Boundary Explorer spacecraft stopped responding to commands after an anomaly. When gentler techniques failed, NASA resorted to rebooting the spacecraft with the remote equivalent of a power cycle.[7]
^Scott Mueller (2003). "21: Power Cycling". Upgrading and Repairing PCs. Upgrading and Repairing Series. Que Publishing. p. 1195. ISBN978-0-7897-2745-9. Retrieved 28 January 2014.
^"Landing at Fra Mauro". NASA. "108:08:42 Haise: Antares, Houston. We'd like you to cycle the Landing Radar (circuit) breaker."
^David A. Mindell (2011). Digital Apollo: Human and Machine in Spaceflight. MIT Press. Page 247.
^Clark, Stephen (11 November 2014). "Video: Flight director updates status of comet lander". spaceflightnow.com.
^"U.S. Air Force Awards $2B AEHF Production Contract". 30 December 2012.
^"Live Broadcast: Atlas V AEHF-6". YouTube. Archived from the original on 2021-12-19. At 1:32:56, "We turned off the hydraulics and brought them back up. The parameter in question is now stable. [...] Our recommendation is to try again."
^Nancy Atkinson (11 March 2023). "NASA Fixes Malfunctioning Spacecraft The Same Way You Fix Your Troublesome Laptop". Science Alert.
April 10, 2024
power, cycling, been, suggested, that, this, article, merged, with, reboot, discuss, proposed, since, february, 2024, turning, piece, equipment, usually, computer, then, again, reasons, power, cycling, include, having, electronic, device, reinitialize, configu. It has been suggested that this article be merged with Reboot Discuss Proposed since February 2024 Power cycling is the act of turning a piece of equipment usually a computer off and then on again Reasons for power cycling include having an electronic device reinitialize its set of configuration parameters or recover from an unresponsive state of its mission critical functionality such as in a crash or hang situation Power cycling can also be used to reset network activity inside a modem It can also be among the first steps for troubleshooting an issue Contents 1 Overview 2 Historical uses 3 See also 4 ReferencesOverview editPower cycling can be done manually usually using a switch on the device to be cycled automatically through some type of device system or network management monitoring and control or by remote control through a communication channel In the data center environment remote control power cycling can usually be done through a power distribution unit over TCP IP In the home environment this can be done through home automation powerline communications or IP protocols Most Internet Service Providers publish a how to on their website showing their customers the correct procedure to power cycle their devices Power cycling is a standard diagnostic procedure usually performed first when the computer freezes However frequently power cycling a computer can cause thermal stress 1 Reset has an equal effect on the software but may be less problematic for the hardware as power is not interrupted Historical uses editOn all Apollo missions to the moon the landing radar was required to acquire the surface before a landing could be attempted But on Apollo 14 the landing radar was unable to lock on Mission control told the astronauts to cycle the power 2 They did the radar locked on just in time and the landing was completed 3 During the Rosetta mission to comet 67P Churyumov Gerasimenko the Philae lander did not return the expected telemetry on awakening after arrival at the comet The problem was diagnosed as somehow a glitch in the electronics engineers cycled the power and the lander awoke correctly 4 During the launch of the billion dollar 5 AEHF 6 satellite on 26 March 2020 by an Atlas V rocket from Cape Canaveral Air Force Station a hold was called at T 46 seconds due to hydraulic system not responding as expected The launch crew turned it off and back on and the launch proceeded normally 6 In 2023 the Interstellar Boundary Explorer spacecraft stopped responding to commands after an anomaly When gentler techniques failed NASA resorted to rebooting the spacecraft with the remote equivalent of a power cycle 7 See also editEnergy conservation Hard reboot Power sequencingReferences edit Scott Mueller 2003 21 Power Cycling Upgrading and Repairing PCs Upgrading and Repairing Series Que Publishing p 1195 ISBN 978 0 7897 2745 9 Retrieved 28 January 2014 Landing at Fra Mauro NASA 108 08 42 Haise Antares Houston We d like you to cycle the Landing Radar circuit breaker David A Mindell 2011 Digital Apollo Human and Machine in Spaceflight MIT Press Page 247 Clark Stephen 11 November 2014 Video Flight director updates status of comet lander spaceflightnow com U S Air Force Awards 2B AEHF Production Contract 30 December 2012 Live Broadcast Atlas V AEHF 6 YouTube Archived from the original on 2021 12 19 At 1 32 56 We turned off the hydraulics and brought them back up The parameter in question is now stable Our recommendation is to try again Nancy Atkinson 11 March 2023 NASA Fixes Malfunctioning Spacecraft The Same Way You Fix Your Troublesome Laptop Science Alert Retrieved from https en wikipedia org w index php title Power cycling amp oldid 1212165855, wikipedia, wiki, book, books, library,
