mergerfs
Ranked 2 of 3 file systems by recommenders
Pools separate disks into one mount point, often with SnapRAID; people praise its flexibility and low maintenance. Caveat: it fights you if you want explicit disk placement.
Pools separate disks into one mount point, often with SnapRAID; people praise its flexibility and low maintenance. Caveat: it fights you if you want explicit disk placement.
7 people gave an opinion
- recommend it
- 6
- criticize it
- 1
- approval share
- 86%
Recommended in 5 of 13 months
- November 2025: recommended
- December 2025: recommended
- January 2026: not recommended
- February 2026: recommended
- March 2026: not recommended
- April 2026: recommended
- May 2026: not recommended
- June 2026: not recommended
- July 2026: recommended
- August 2026: not recommended
- September 2026: not recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 6 people recommend itNeeds 10 or more, not met.
- 6 recommenders for every criticNeeds 2 to 1 or better, met.
- Recommended in 5 of 13 monthsNeeds 4 or more, met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Pairs well with SnapRAID
“I've migrated over to using snap raid + mergerfs for my larger Linux iso storage array”
Comment from 8 Jul 2026 in “How to Build a Minimal ZFS NAS Without Synology, QNAP, TrueNAS” “mergerfs and snapraid are just more logical”
Comment from 8 Jul 2026 in “How to Build a Minimal ZFS NAS Without Synology, QNAP, TrueNAS” “Consider mergerfs + snapraid.”
Comment from 1 Dec 2025 in “Don't throw away your old PC–it makes a better NAS than anything you can buy” Pools separate disks into one mount
“With MergerFS you just use regular file systems that are separate, but they get combined into a single mount point.”
Comment from 12 Apr 2026 in “Ask HN: What Are You Working On? (April 2026)” “I've migrated over to using snap raid + mergerfs for my larger Linux iso storage array”
Comment from 8 Jul 2026 in “How to Build a Minimal ZFS NAS Without Synology, QNAP, TrueNAS” Reliable, low maintenance over years
“This setup is flexible, robust, easy/cheap to expand, and requires practically zero maintenance.”
Comment from 30 Nov 2025 in “Don't throw away your old PC–it makes a better NAS than anything you can buy” “I've been using ext4 with SnapRAID and mergerfs for years without issues.”
Comment from 1 Feb 2026 in “Guix System First Impressions as a Nix User”
Other file systems people recommend
The two most recommended other file systems, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| OpenZFS | 22 | 5 | 81% | 9 | — | Approved |
| mergerfsThis page | 6 | 1 | 86% | 5 | — | — |
| Berkeley Fast File System (FFS) | 5 | 3 | 63% | 3 | — | — |
What people said
9 of the 10 comments that mention it, newest first. Each links to the original comment.
“mergerfs and snapraid are just more logical”
“I've migrated over to using snap raid + mergerfs for my larger Linux iso storage array”
“With MergerFS you just use regular file systems that are separate, but they get combined into a single mount point.”
“fighting mergerfs when you just want explicit disk placement”
“I've been using ext4 with SnapRAID and mergerfs for years without issues.”
“I'd recommend all of these guides / articles, I basically cherry-picked what I liked from all of them”
“This gives me tiered storage: newly created files and reads hit the SSDs first.”
“Consider mergerfs + snapraid.”
“This setup is flexible, robust, easy/cheap to expand, and requires practically zero maintenance.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.