notes/docs/home-server/storage.md

schema_version, id, type, scope, sensitivity, last_reviewed, sources, related, update_triggers, unknowns

schema_version	id	type	scope	sensitivity	last_reviewed	sources	related	update_triggers	unknowns
1	home-server.storage	reference	jupiter disks raid filesystems docker-volumes	private-infrastructure	2026-10-06	kind reference owner-report lsblk filesystem output, RAID level, mount placement and Docker data root, 2026-10-06 kind reference owner-report Seedbox rclone mount and systemd unit, 2026-10-06 kind reference owner-report Deployed Portainer uses /data/portainer bind mount, not portainer_data, 2026-10-06 kind reference owner-report mdstat, mdadm scans/detail, fstab, findmnt and Docker volume/container inspection, 2026-10-06 kind repository revision paths repository jupiter-stacks 610e325ef6a98850511ce7a089b0b9a77bfecf15 stacks/backrest/docker-compose.yml stacks/jellyfin/docker-compose.yml stacks/authelia/docker-compose.yml stacks/traefik/docker-compose.yml	home-server.reference home-server.host home-server.seedbox home-server.portainer home-server.backups home-server.operations	disk-change raid-change mount-change volume-change backup-coverage-change	persistent-mdadm-config-and-initramfs-content disk-health

Storage

---
config:
  themeCSS: |
    .node rect { rx: 8px; ry: 8px; stroke-width: 1.5px; }
    .cluster rect { fill: var(--infra-zone) !important; stroke: var(--infra-border) !important; stroke-dasharray: 5 5; rx: 12px; ry: 12px; }
    .label, .nodeLabel, .cluster-label { color: var(--infra-text) !important; }
    .flowchart-link { stroke: var(--infra-line) !important; }
    marker path { fill: var(--infra-line) !important; stroke: var(--infra-line) !important; }
    .infraStorage rect, .infraStorage path { fill: var(--infra-storage-fill) !important; stroke: var(--infra-storage-stroke) !important; }
    .infraCloud rect { fill: var(--infra-cloud-fill) !important; stroke: var(--infra-cloud-stroke) !important; }
    .infraClient rect { fill: var(--infra-client-fill) !important; stroke: var(--infra-client-stroke) !important; }
    .infraService rect { fill: var(--infra-service-fill) !important; stroke: var(--infra-service-stroke) !important; }
  flowchart:
    curve: basis
    nodeSpacing: 30
    rankSpacing: 45
---
flowchart LR
  subgraph Array["HDD ARRAY / APPLICATION DATA"]
    direction TB
    A["<b>Seagate BarraCuda</b><br/>sda1 / 2 TB"]
    B["<b>Seagate BarraCuda</b><br/>sdb1 / 2 TB"]
    RAID["<b>Linux MD RAID 0</b><br/>md0 / no redundancy"]
    DATA[("<b>/data</b><br/>ext4")]
    A --> RAID
    B --> RAID
    RAID --> DATA
  end

  subgraph System["SSD / SYSTEM"]
    direction TB
    SSD["<b>Samsung 860 EVO</b><br/>sdc / 1 TB"]
    EFI["<b>/boot/efi</b><br/>sdc1 / FAT32"]
    SWAP["<b>Swap</b><br/>sdc2"]
    ROOT["<b>/</b><br/>sdc3 / ext4"]
    DOCKER["<b>/var/lib/docker</b><br/>Named volumes"]
    CACHE["<b>/home/jay/data</b><br/>Backrest / Jellyfin caches"]
    SSD --> EFI
    SSD --> SWAP
    SSD --> ROOT
    ROOT --> DOCKER
    ROOT --> CACHE
  end

  class A,B,SSD,DATA,ROOT infraStorage
  class RAID infraCloud
  class EFI,SWAP infraClient
  class DOCKER,CACHE infraService

RAID 0: striping; no redundancy; either HDD failure loses the array.

Filesystems

Device names reflect the supplied snapshot; UUIDs identify filesystems.

Mount	Device	Filesystem	UUID
/data	/dev/md0	ext4	d60390a1-7db3-44cc-bbde-693c23e42001
/	/dev/sdc3	ext4	7a5e0ee6-4a65-4f68-9128-b3b4f3406447
/boot/efi	/dev/sdc1	FAT32	1DDE-CDF9
swap	/dev/sdc2	swap	4781ea5d-fba5-438d-8d97-6a0801669ca1

MD members: /dev/sda1, /dev/sdb1; metadata 1.2; array label jupiter:0; MD UUID c67fccaa-e541-bf2d-2bf6-83221086e0e9.

RAID assembly / geometry

Linux MD, inspected with mdadm; ext4 directly on the array, no intervening LVM.

Setting	Observed value
Device / scan name	/dev/md0 / /dev/md/0
mdadm UUID	c67fccaa:e541bf2d:2bf68322:1086e0e9
Capacity	3.64 TiB / 4.00 TB
Layout / chunk	original / 512 KiB
Member order	Slot 0: /dev/sdb1; slot 1: /dev/sda1
State at review	clean; 2 active members; no failed/spare devices

Scan output identifies the array; persisted mdadm configuration/initramfs were not supplied. Assembly is not array creation; do not substitute mdadm --create.

Mount configuration

Supplied /etc/fstab:

UUID=7a5e0ee6-4a65-4f68-9128-b3b4f3406447 /         ext4 errors=remount-ro 0 1
UUID=1DDE-CDF9                            /boot/efi vfat utf8              0 0
UUID=d60390a1-7db3-44cc-bbde-693c23e42001 /data     ext4 defaults          0 2
UUID=4781ea5d-fba5-438d-8d97-6a0801669ca1 none      swap sw                0 0

Observed /data: rw,relatime,stripe=256; /tmp: tmpfs. Seedbox FUSE mount is service-managed, not listed in fstab.

Placement

Host path	Backing / purpose
/data/<service>	HDD array; service bind mounts
/mnt/seedbox	Remote SFTP/FUSE mount; seedbox; not a local replica
/home/jay/data/backrest/cache	SSD; Backrest cache
/home/jay/data/jellyfin/cache	SSD; Jellyfin cache
/var/lib/docker	SSD; Docker state and default local named volumes
/var/lib/containerd	SSD; observed containerd overlayfs snapshot storage
/data/portainer	HDD array; deployed Portainer state; backed up
/data/authelia	Configuration, users, SQLite, notifications
/data/traefik/{acme,dynamic,certs}	ACME state, dynamic configuration, certificates

Cache placement is per mount, not globally SSD-backed. /data backups do not implicitly include SSD-backed Docker volumes.

Named-volume snapshot

Inspected volumes below use driver local, no driver options, and /var/lib/docker/volumes/<name>/_data on SSD.

Volume	Running consumer / container path
audiobookshelf_config	Audiobookshelf /config
jellyfin_config	Jellyfin /config
notes_static	Notes web /usr/share/nginx/html; builder /site-output
dozzle_dozzle_data	Dozzle /data
ctq_ctq_postgres_data	CTQ PostgreSQL /var/lib/postgresql/data
havox_src	Havox web/sync /git

Other volumes are present without a running consumer shown, including jellyfin_cache, notes_notes_static, and monitoring volumes. Presence does not prove use or justify deletion. Named volumes are outside the supplied four-directory backup plan.