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Hot Swappable

Hot swappable components can be removed and replaced while a system is still powered on and running, eliminating downtime during hardware failures. Understanding which parts support hot swap and which do not is essential for maintaining high-availability environments.

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About this video

Hot swappable hardware refers to components that can be physically removed and replaced while the host device remains powered on and in service. This capability is essential in environments where downtime carries significant operational or financial cost. Without hot swap support, even a redundant configuration offers only partial protection — a failed component still requires a scheduled shutdown to replace, creating a window of vulnerability and service interruption. Common examples of hot swappable components include redundant power supplies in enterprise switches and hard drives in servers configured with mirrored storage. In the power supply scenario, if one unit fails in a dual-supply switch, the second continues supplying power while the failed unit is unplugged and replaced, all without disrupting network traffic. In the storage scenario, a failed mirrored drive can be pulled from a live server, replaced with a new unit, and the system will automatically rebuild the mirror, restoring full redundancy without any manual configuration. Not every component in a device is hot swappable, even in enterprise-grade hardware. Some parts still require the system to be powered down before removal or installation. Knowing which components support hot swap and which do not is a foundational requirement for anyone responsible for maintaining uptime, planning maintenance windows, and responding to hardware failures in production environments.

What you'll learn

What's covered

Hot Swappable Devices

Key terms

Hot Swappable
The ability to remove and replace a hardware component while the system remains powered on and operational, without requiring downtime.
Redundancy
The duplication of critical components or systems to increase reliability and availability.
Redundant Power Supply
A duplicate power supply unit installed in a device so that if one fails, the other maintains operation without interruption.
Mirrored Drive
A storage configuration in which data is duplicated across two or more drives, allowing a failed drive to be replaced and rebuilt without data loss or downtime.

Topics

Hot Swap Hardware Maintenance Redundant Power Supplies Storage Drives High Availability Hardware

Transcript

Let's talk about something that's hot swappable and what hot swappable means. To do this, I'm going to take a look at a switch, and then we'll take a look at a server.

A redundant power supply on a switch

I'm going to give a little scenario here. Let's say on this switch one of my power supplies dies. There are two power supplies here, so it's redundant. Let's say one of these dies. That's great, we have another power supply, so we're still up and running.

But imagine now, when I go to replace this power supply, if I had to turn down the switch, pull the bad power supply out, put the new power supply in, and turn it back on. I still have downtime, and that can be problematic.

So some of this equipment is what's called hot swappable, which means that I can pull it out and replace it even if the equipment is up and running. So like these power supplies: if one of these power supplies dies, I can unplug it from the power, I can pull it out and replace it with a new power supply and put it back in, and then it's still up and running and I never have to shut it down. That's what hot swappable is.

Drives in a server

I've also got the server right here, because some of these drives here are mirrored, which means that they have duplicate data on them. If one of these drives dies, I could actually pull out the drive and then replace it, and it will then rebuild that drive and the drive will come back online without me having to tell it to do anything.

So some equipment is hot swappable. Some devices and some parts of the equipment are hot swappable and parts of it are not, so you need to know which parts are hot swappable and which ones are not.

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