# amadvance/snapraid

A backup program for disk arrays. It stores parity information of your data and it recovers from up to six disk failures

Repository: https://github.com/amadvance/snapraid
Canonical: https://ross.abutalabs.com/products/snapraid
Homepage: http://www.snapraid.it/
Language: C
License: NOASSERTION
License Family: other
Last push: 2026-08-26T20:55:57+00:00

## Health v2 (maintenance only)
Score: 97/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 93, longevity 100
- inputs: {"age_days": 4551, "days_push": 7, "days_rel": 45, "gap_med": 7, "n_releases_24m": 12}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2556, forks 94 (observed 2026-08-28T04:07:00.780660+00:00)

## What it is
SnapRAID is a backup program for disk arrays that stores parity information to recover from up to six simultaneous disk failures. It targets home media centers and large archives of infrequently changing files, offering data hashing, flexible disk management, and an optional daemon with web UI, SMART monitoring, and alerts.

## Use cases
- protect a home media server array from disk failures
- recover deleted files from a disk array
- detect and repair silent data corruption (bit-rot)
- add disks of different sizes to a storage pool without reformatting
- schedule parity syncs and scrubs automatically
- monitor drive health and get alerts on disk errors

## When to choose
- you have large, mostly static files like movies, music, and photo archives
- you want RAID-like redundancy without reformatting existing disks or locking in your data
- you need protection against more than two disk failures
- you want to recover accidentally deleted files to a previous state

## When to avoid
- you need real-time redundancy for frequently changing files
- you require continuous uptime and immediate failover like RAID
- you need to protect the boot/OS drive or small actively-written datasets

## Facets
- artifact type: application
- maturity: active
- function: backup, cryptography, monitoring, cli
- domain: files, self-hosted, developer-tools
- platform: windows, cli, cross-platform
- tags: disk-arrays, parity, data-recovery, raid-alternative, media-server, snapraid, linux, macos

## Member repositories
- amadvance/snapraid (main) score 97

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:00.780660+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:23:39.707258+00:00, confidence not recorded.
  - readme: https://github.com/amadvance/snapraid (fetched 2026-08-28T04:07:00.780660+00:00, sha 0effbcff413a)
  - homepage: http://www.snapraid.it/ (fetched 2026-08-29T10:06:18.739252+00:00, sha ab195ebac9c2)
  - site_page: http://www.snapraid.it/faq (fetched 2026-08-29T10:06:18.748798+00:00, sha d58b37feae67)
  - site_page: http://www.snapraid.it/ui (fetched 2026-08-29T10:06:18.751817+00:00, sha cdae6edad033)
- Data as of 2026-08-30T08:39:29.467469+00:00.