---
created: 2026-05-20 09:30
modified: 2026-05-28
type: note
tags:
  - dev-ops
  - network
  - backup
  - system-config
  - localhost
aliases:
  - borg-backups
---
# [[Backup System — Borg, Kopia & Restic]]

## Overview

Three-machine backup with dual-copy (local + network) covering all critical data.

| Machine | Tool | Target | Schedule |
|---------|------|--------|----------|
| **.27** — sam-4screen-desktop | Borg (SSH) | `.13:/mnt/ubuntu_storage_3TB/backup/borg/.27` | Daily (after boot) |
| **.13** — nixos-desktop | Borg (local) | `/mnt/ubuntu_storage_3TB/backup/borg/.13` + rsync→.35/.23 | Daily 04:00 / 05:00 |
| **.13** — archive | Borg (SSH) | `.35:/mnt/nfs_usb_3tb/borg-repos/archive` | **NEW 2026-05-30** |
| **.35** — sam-ubuntu1 | Kopia + Backrest | `.23` NFS (`usb_3tb`) | Weekly Sun 22:00 |

---

## .27 — sam-4screen-desktop

**Source**: `/home/sam/` (excl: `.cache`, `.npm`, `node_modules`, `.venv`, `target`, `.cargo`, etc.)
**Target**: `sam@192.168.20.13:/mnt/ubuntu_storage_3TB/backup/borg/.27` via SSH (key: `~/.ssh/id_ed25519`)
**Schedule**: systemd timer — `OnCalendar=daily` (fires midnight, catches up after boot via Persistent)
**Prune**: 7 daily, 4 weekly, 3 monthly
**Passphrase**: `/home/sam/.borg-passphrase`
**Config**: `/etc/nixos/hosts/sam-4screen-desktop/backup.nix`
**Status**: `systemctl status borgbackup-job-home-to-13.service`
**Snapshots**: `borg list sam@192.168.20.13:/mnt/ubuntu_storage_3TB/backup/borg/.27`

## .13 — nixos-desktop

**Source**: Docker configs (`/home/sam/Docker/`), PocketBase (`/home/sam/pocketbase-data/`), dotfiles, `.ssh/`
**Primary**: `/mnt/ubuntu_storage_3TB/backup/borg/.13` (local ext4, 2.7T, 2.6T free)
**Secondary**: rsync → `sam@192.168.20.35:/mnt/nfs_usb_3tb/borg-repos/.13` → `.23` USB
**Schedule**: Borg daily 04:00 | rsync daily 05:00
**Prune**: 7 daily, 4 weekly, 3 monthly
**Passphrase**: `/home/sam/.borg-passphrase` (same as .27 recommended)
**Config**: `/etc/nixos/backup.nix`
**Snapshots**: `borg list /mnt/ubuntu_storage_3TB/backup/borg/.13`

> ⚠️ Borg runs as root — `postHook` chowns to `sam:users`. Known hosts issue: `/home/sam/.ssh/known_hosts` was a broken directory (fixed).

## .35 — sam-ubuntu1

**Tools**: Kopia + Backrest (Restic) — Docker containers
**Target**: `//192.168.20.23/usb_3tb` → `/mnt/nfs_usb_3tb/`
- Kopia repo: `/mnt/nfs_usb_3tb/kopia/backups/` (46G)
- Restic repo: `/mnt/nfs_usb_3tb/backups/restic/` (11G)

### Backup Sources

| Source | Tool | Status |
|--------|------|--------|
| `/Docker/Containers/` | Kopia | ✅ Weekly Sun 22:00 |
| `/docker-config`, `/docker-volumes` | Backrest (Restic) | ✅ Weekly Sun 23:00 |
| `/host_fs/root/trilium-data` | Backrest (Restic) | ✅ Weekly Sun 23:00 |
| **`/host_fs/mnt/hd`** ← _new_ | **Backrest (Restic)** | ✅ **Added 2026-05-28** |
| **`/host_fs/var/lib/docker/volumes`** | Kopia | ✅ Weekly Sun 22:00 |

### Retention

- Kopia: 10 latest, 4 weekly, 12 monthly, 3 annual
- Backrest: 10 latest (prune/check daily)

### Data Drive (My Passport)

.dev/vda1 — 1.8T NTFS — physical WD My Passport passed through to VM
**Mount point**: `/mnt/hd` (was incorrectly at `/mnt/my_passport` — fixed 2026-05-28)
**Contains**: Immich photos (40K), and all Docker service data (audiobookshelf, lidarr, radarr, sonarr, qbittorrent, etc.)

### VM-level

Proxmox Backup Server (.48) — full VM backup

## .23 — file-server

- 2.7T USB drive shared via CIFS/SMB to `.35`
- Backup repos: Kopia (46G) + Restic (13G) + Borg archive repo (new)
- 2.0T free
- Also stores: `sam/` (personal docs/music/photos) — to be moved to .13 archive

### Borg archive repo (new 2026-05-30)

- **Location**: `/mnt/nfs_usb_3tb/borg-repos/archive`
- **Source**: `.13` `/mnt/ubuntu_storage_3TB/archive/` (648G — photos, old web work, documents)
- **Encryption**: repokey-blake2
- **Compression**: auto,lzma
- **Run from .13**: `borg create sam@192.168.20.35:/mnt/nfs_usb_3tb/borg-repos/archive::archive-$(date +%Y%m%d) /mnt/ubuntu_storage_3TB/archive/`

## Restore Commands

### .27 restore
```bash
export BORG_PASSPHRASE=$(cat /home/sam/.borg-passphrase)
borg extract sam@192.168.20.13:/mnt/ubuntu_storage_3TB/backup/borg/.27::<archive>
```

### .13 restore
```bash
export BORG_PASSPHRASE=$(cat /home/sam/.borg-passphrase)
borg extract /mnt/ubuntu_storage_3TB/backup/borg/.13::<archive>
```

## Not Covered

- `.27`: Git-tracked NixOS config (already covered by flakes)
- `.13`: Git-tracked NixOS config, `ollama`/`open-webui` Docker volumes
- `.35`: **`.23` file-server has no backup** — single point of failure for restic/kopia repos
- `.23`: Itself has no backup at all
- **`.13` archive** — now backed up to .23 Borg repo ✅

## Recent Changes

- **2026-05-28**: Discovered My Passport (`/dev/vda1`, 1.8T) had all real data but was mounted at `/mnt/my_passport` instead of `/mnt/hd`. Remounted to `/mnt/hd`. Immich photos (40K) and all Docker service data recovered.
- **2026-05-28**: Added `/host_fs/mnt/hd` to Backrest (Restic) backup plan.
- **2026-05-30**: Created Borg archive repo on `.23` (`/mnt/nfs_usb_3tb/borg-repos/archive`) to back up `.13` `/mnt/ubuntu_storage_3TB/archive/` (648G). First backup pending.
- **2026-05-30**: Reformatted `.13` `/mnt/storage/` (932G NTFS → ext4) and `/mnt/data/` (1.8T NTFS → ext4). Both now empty with 870G and 1.7T free respectively.
