This post discusses power supply ‘holdup’, and how it can impact network or server hardware uptime. The holdup time or ‘output holdup time’ is the length of time that a given power supply can maintain output power to the switch or server after it’s input power supply has been cut. The dependent host will shut down if the power supply isn’t restored to the PSU before the hold-up time expires. I like to think of holdup time as a power buffer.
Why talk about network power connectors?
Here at Network Sherpa base camp, we’re all about removing confusion and saving time. I’ve always had a bit of difficulty differentiating between the connector types, PDU’s, inlets outlets and country specific power cords. In this post I share my learnings.
In the video below I focus on the commonly used low power IEC 320 series C13/14 connectors. If you want further detail or more info about other connectors, then check out NetworkingNerds’s great post on this topic.
In my day job I work as a network test engineer and support a remote lab. We have a few devices connected to network switchable PDUs that allow us to remotely reset the power outlet of test devices. Test switches and routers get ‘borked’ pretty often so these switchable PDUs can come in really handy. Continue reading