How to Set Up Plex Cache on SSD for Faster Media Access: Complete Guide

by | Feb 17, 2025

Updated: March 05, 2025
How to Set Up Plex Cache on SSD for Smoother Streaming

Setting up Plex cache on an SSD improves performance by reducing buffering and making it faster to access media. SSD caching stores data that is used often, which speeds up streaming

This blog shows you how to manage cache files, turn on SSD cache, and make Plex settings work better. You will also learn how to use SSD Cache Advisor and where Plex stores cache. If you want to make your Plex Media Server work better with SSD caching, follow these steps.

How to Set Up Plex Cache on SSD?

A high-tech home media server setup featuring an SSD being installed into a powerful computer

Understanding SSD Caching for Plex

Adding an SSD cache to your Plex media server speeds up streaming and reduces the time it takes to load videos. Instead of using a traditional hard drive (HDD), an SSD cache temporarily stores files that are accessed a lot, which cuts down on latency. Users will benefit from this setup because it speeds up disc access and keeps playback from getting slowed down.

  • Performance advantage: SSD cache reduces lag and buffering.
  • Storage optimization: The main data stays on the HDD, while frequently used files stay on the SSD.
  • Better streaming: You can play music smoothly, even over a LAN or WiFi network.

Step-by-Step Guide to Setting Up Plex Cache on SSD

These steps will help you make an SSD cache that works well for your Plex server:

  1. Install SSD: Link the SSD to your NAS or server and look at the space it takes up.
  2. Create SSD volume: Make changes to the SSD and add it to your storage array.
  3. Enable SSD cache: Go to the system settings in your OS or FreeNAS and activate caching.
  4. Modify Plex settings: Change the settings for your Plex library so that the cache folder goes to your SSD.
  5. Restart Plex server: Check that the changes take effect and see how well the playback works.

How Do I Enable Cache on My SSD?

A high-tech computer setup showing an SSD being configured for caching

Checking SSD Compatibility and System Requirements

Not every SSD can be used for caching. Make sure it works with your NAS or server before you set it up.

  • SSD type: For your system’s RAID or array setup, pick either SATA or NVMe.
  • RAM requirements: System RAM is used by Plex cache, so make sure enough memory is available.
  • OS compatibility: Some systems, like FreeNAS, need to be set up differently.

Activating SSD Cache on Synology NAS

Through Storage Manager, users of Synology NAS can turn on the SSD cache.

  1. Go to Storage Manager > SSD Cache: Click “Create” and choose a volume.
  2. Select RAID type: For the best performance, choose either read-only or read-write mode.
  3. Allocate cache space: Tell the computer how much space on the hard drive to use for caching.
  4. Apply settings: Finalize changes and restart the system.

Can SSD Be Used as Cache?

A modern computer setup featuring an SSD being highlighted as a caching device

How SSD Caching Works

SSD caching speeds up Plex by putting a fast buffer between your storage and CPU.

  • Read caching: When you access files often, they load faster, which cuts down on delays.
  • Write caching: The speed is improved by using temporary storage before writing data to the HDD.
  • Network advantage: Increases the speed of Plex when using WiFi or LAN to access files.

Types of SSD Caching: Write-Through vs. Write-Back

For each Plex server setup, the different caching modes offer different benefits.

  • Write-through cache: Data is written to both SSD and HDD at the same time. Keeps things reliable, but it may slow down write speeds.
  • Write-back cache: Data is written to SSD first, and then it is moved to HDD. faster, but might lose data if the system crashes.

Where Does Plex Store Cache?

A high-tech home media server setup showing a sleek SSD and a powerful computer managing Plex cache

Understanding Plex Cache Directories

Plex cache stores media files, thumbnails, and metadata that are used a lot so that they load faster. This stops the HDD from being accessed all the time, which speeds up the Plex server. Depending on your OS and how your storage is set up, the cache is saved in certain directories.

  • Default cache location: Found in the plex library folder inside the server’s main storage directory.
  • Types of cached data: This file has artwork, transcoded media, and metadata that makes it easy to find.
  • SSD volume advantage: Moving the cache folder to an SSD speeds things up and makes the HDD less stressed.

Clearing and Managing Plex Cache for Better Performance

Over time, cache files can gather unnecessary data and slow down your computer. Maintaining efficiency means clearing them on a regular basis.

  1. Locate the cache folder: Find it on your server or network in the plex library directory.
  2. Delete unnecessary files: Get rid of old transcoded media and metadata that you don’t need.
  3. Automate cleanup: Scripts or apps can be used to regularly clear the cache without having to do it by hand.
  4. Move cache to SSD volume: To improve performance, move the cache directory in the Plex server settings.

How Do I Enable SSD Cache Advisor?

What Is SSD Cache Advisor & Why Use It?

SSD Cache Advisor helps users get the most out of their network storage by looking at how much data they use and suggesting the best cache size. It makes sure that the SSD volume is used efficiently to speed up the system.

  • Works with raid arrays: It works with multiple discs and changes its caching strategies automatically.
  • Reduces HDD usage: Moves frequently used media to SSD, which keeps HDDs from wearing out.
  • Optimizes backups: Keeps important files accessible without slowing down the computer.

How to Run SSD Cache Advisor on Synology NAS

A user can easily turn on SSD Cache Advisor, which helps them fine-tune their storage settings.

  1. Open Storage Manager: In your Nas system settings, go to the SSD cache section.
  2. Select a volume: Pick the storage array that will have the cache turned on.
  3. Start analysis: For at least a week, let the system track how you access media.
  4. Apply recommendations: To get the best performance, use the recommended cache size and settings.

Final Thoughts

Learning how to set up a plex cache on SSD speeds up streaming and cuts down on buffering. Utilising an SSD cache makes frequently used files load faster, which keeps the NAS storage from being overloaded. 

As the cache is now on an SSD instead of an HDD, the system uses RAM more efficiently. A solid-state drive (SSD) cache is a good addition to any Plex server for managing large apps or streaming media smoothly.

FAQs

Can I use SSD caxche for Plex server?

Yes, enabling ssd cache helps the plex server store cache efficiently, speeding up storage and reducing ram usage.

How do I move the Plex cache to SSD?

Modify Plex apps settings, redirect the cache to an ssd, and restart the nas storage for changes to take effect.

Does SSD cache improve Plex streaming?

Yes, an SSD cache reduces loading times and improves app performance by keeping essential files on fast storage.

How much SSD cache do I need for Plex?

The required SSD cache size depends on your nas storage, ram, and the number of apps running on the Plex server.

Can I use SSD cache on NAS for other apps?

Yes, ssd cache benefits all apps, improving ram efficiency, file access speed, and overall storage performance.

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