---
title: Backblaze B2
created: 2026-05-24
updated: 2026-05-24
type: entity
tags: [services, storage, s3, backup]
sources: [homelab/architecture.md, docs/TrueNAS-Migration]
confidence: high
---

# Backblaze B2

## Overview

S3-compatible cloud storage for off-site backups of critical homelab data. Configured as a Cold storage tier in TrueNAS and as a rclone remote for Obsidian vault sync.

## Key Facts

- **Service**: Backblaze B2 (S3-compatible)
- **Purpose**: Off-site backup of configuration, documents, and selected data
- **Cost**: ~$7/mo
- **TrueNAS integration**: B2 bucket configured as Cold storage tier in TrueNAS SCALE
- **Obsidian vault sync**: rclone remote `b2-homelab-backups` syncs vault to B2 bucket
- **Access**: Application key-based authentication (not AWS credentials)

## TrueNAS Configuration

TrueNAS exports `backblaze-b2` remote as a Cloud Sync channel. Datasets backed up include:
- Obsidian vault snapshots
- Homelab agent configs and session history
- Database backups

## Related

- [[truenas]] — TrueNAS B2 Cold tier configuration
- [[rustfs]] — S3 service running on TrueNAS (local S3, NOT Backblaze)
- [[nfs-storage]] — local NFS storage vs. cloud backup strategy