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RAID can keep a Jellyfin server running after certain drive failures, but it is not a backup and cannot protect your library from every kind of loss. A resilient setup also protects Jellyfin’s database and configuration, keeps independent copies that can be restored, and limits the chance that outdated software or an exposed administrator account will undermine recovery.
The four-layer framework below is a practical synthesis, not an official Jellyfin model. Choose storage and backup arrangements for your library, budget, and recovery needs; not every server needs the same design.
Is RAID a backup?
No. RAID combines disks to improve availability or tolerate certain drive failures, depending on the RAID level and implementation. It does not create an independent copy of your data. A deletion, database corruption, ransomware incident, administrator mistake, or loss of the machine can affect data on the array too.
Think of RAID as a way to keep some systems operating through a disk failure, not as a recovery plan. It can be one layer of protection, but it cannot replace a separate backup with a tested restore.
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Four layers of Jellyfin server protection
1. Disk redundancy for availability
Use an appropriate redundant storage setup if you need the server to continue operating after a supported disk failure. Know what failures your chosen configuration can tolerate and how you will replace a failed drive. Redundancy does not guarantee that files are intact or recoverable after other incidents.
2. A backup of Jellyfin’s own state
Your media files are only part of the server. Jellyfin also maintains a database, metadata, configuration, and other data such as subtitles and trickplay files. The built-in Backup/Restore feature can include the database, metadata, subtitles, and trickplay data; the database is always included. Jellyfin also documents manually copying its data and configuration directories.
Jellyfin’s Backup/Restore feature was added in version 10.11. Confirm that your installed version supports it and check the current documentation for the applicable interface and options.
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Keep at least one backup separate from the server’s normal storage and write access. A local external drive can provide a separate copy; rotating it offline limits exposure to incidents that affect the running server. An offsite copy addresses a different risk: losing the server and nearby storage together.
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Ransomware.org describes the general 3-2-1 approach as three copies of data, on two different media types, with one copy offsite. This is general backup guidance, not a Jellyfin requirement or a guarantee against data loss. The key is that a backup must remain independent enough to survive the failure it is meant to address—and must be restorable.
4. Maintained software and controlled administrator access
Keep Jellyfin current and limit administrator access to people who need it. Jellyfin’s security policy states: “Only the most recent stable release of Jellyfin server is guaranteed to have security patches applied.” Administrator access can enable destructive actions, so protect those accounts and avoid granting the role casually.
Back up before upgrading. Jellyfin warns, “Jellyfin does not have a downgrade mechanism.” If a newer version has started and applied pending migrations, reverting to an older version may not be possible. This matters especially when considering unstable releases.
How to back up Jellyfin’s database and configuration
Use the built-in archive when available
- Confirm that your installed Jellyfin version includes Backup/Restore; the feature was added in version 10.11.
- Open Jellyfin’s Backup/Restore controls and select the data you want included. The database is always included; metadata, subtitles, and trickplay data can also be included.
- Run the online backup during a low-activity period, with no library scan running. Jellyfin’s documentation says the operation checks for at least 5 GB of free space, but warns that this may not be enough when subtitles or trickplay data are included.
- Copy the resulting archive to an independent destination. An archive stored only on the server is not an independent disaster-recovery copy.
Backup locations vary by installation method. For official Docker installations, the location is under the host source mounted to /config; Debian and Ubuntu use /var/lib/jellyfin/data/backups; Windows paths differ between user and service installations. Confirm your configured Jellyfin data and configuration paths instead of assuming a default applies.
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Use a manual copy when appropriate
Jellyfin documents manual copying of its data and configuration directories. Stop the Jellyfin service before copying manually: copying while the database is locked can leave an unusable copy. Include the directories needed for the state you intend to preserve, then store the copy somewhere that is not exposed to the same routine writes as the server.
Keep media storage and Jellyfin’s database in the right places
Jellyfin’s storage guide says SMB and NFS storage must be mounted to the operating system before Jellyfin uses it, and recommends keeping its database local. As the guide puts it, “The Jellyfin database should also be stored locally and not on a network storage device.” A network share can hold media or serve as a backup destination, but that does not make it the right place for the live database.
If a media mount is unavailable during scheduled maintenance, items may be removed from the library. Make sure storage is available when Jellyfin scans or maintains the library, and treat library availability separately from backup protection.
Storage sizing can be substantial. Jellyfin’s documentation gives 10 to 100 GB as an illustrative range for a moderate-sized library database, not a promise for every installation. Its example says a 50 GB Blu-ray remux may transcode to about 15 to 60 GB, depending on bitrate; this is also a sizing illustration, not a universal result. Leave room for database growth, transcodes, and backups based on your own workload.
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Jellyfin’s current storage documentation notes that the database uses SQLite. For ZFS, it recommends record sizes of 4 or 8 KiB for the database dataset, while large-media datasets may suit 1 MiB records. These are storage-performance considerations, not substitutes for backups.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Choose backup destinations by the failure they address
| Protection or destination | What it can help address | Independence and trade-offs |
|---|---|---|
| RAID or other disk redundancy | Some drive failures, depending on configuration | Usually remains part of the server’s storage system; it is not an independent backup. |
| Local external backup drive | Accidental deletion or database corruption, if a clean earlier copy exists | Separate from the array when disconnected; an attached drive may still be exposed to server-level mistakes or ransomware. |
| NAS used as a backup destination | A separate copy of server data, if configured and maintained for that purpose | Being a NAS does not make a copy offline or offsite. A network-accessible destination may share exposure to the server’s normal write access. |
| Offline or offsite copy | Ransomware or administrator mistakes when isolated; loss of the whole machine or premises when offsite | Requires capacity, rotation or transfer, and a restore plan. Recovery may take longer than restoring from nearby storage. |
These options can complement one another. Decide what you need to recover—Jellyfin’s app state, media files, or both—then size destinations for that data and consider how long a restore would take. A NAS may be useful storage or one backup destination, but its presence alone does not establish an independent copy.
Test recovery, not just backup creation
A successful backup job does not prove that the archive is complete or that you can restore service. Ransomware.org advises regular testing, including full recovery tests rather than only checking a single file. Jellyfin documents restoring its built-in archive through the web UI or with the --restore-archive command-line option.
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- Check that recent archives exist at the expected destination and that the destination remains independent from the server.
- Periodically test restoring an archive using Jellyfin’s documented web UI or command-line route.
- Include a full recovery exercise in your plan so you know whether you can restore the required server state, not just retrieve one file.
Ransomware.org’s guidance says, “Be sure to test your backups regularly so that you can move quickly into action after an attack occurs and help the disaster recovery process run more smoothly.” The principle applies to Jellyfin as well: recovery confidence comes from a working restore path, not merely from having an archive.
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