# Machine inventory — Ridgeway Lane home lab

Course-authored sample document. Everything in it is invented so that the question set has
answers that no model could produce from memory. Replace it with your own documents once the
pipeline works.

Last reviewed: 2026-08-14. Reviewed by: the person who owns the machines.

## Machines

### tern

Role: always-on inference host. Sits in the cupboard under the stairs.

- Chassis: small-form-factor desktop, bought second-hand in March 2025
- Accelerator: one discrete graphics card with 24 GB of video memory
- System memory: 64 GB
- Storage: 2 TB NVMe for models, 4 TB spinning disk for backups
- Hostname on the house network: `tern.home.arpa`
- Power: on a switched socket that is never to be switched off without notice

### petrel

Role: workstation. Used interactively, switched off overnight.

- Accelerator: integrated, unified memory
- System memory: 128 GB
- Storage: 4 TB NVMe
- Hostname on the house network: `petrel.home.arpa`
- Notes: this is the only machine allowed to hold unreleased client work.

### skua

Role: spare. Kept powered down in the garage as a cold standby for tern.

- Accelerator: none
- System memory: 32 GB
- Storage: 1 TB NVMe
- Hostname on the house network: `skua.home.arpa`
- Notes: skua has never been used to serve a model and has no accelerator. If tern fails,
  skua runs the front-end and the gateway only, and inference moves to petrel.

## Address allocation

All three machines take fixed addresses from the router's reservation list. Nothing on this
network uses a public address and no port is forwarded from the router to any machine.

## Who has physical access

The two adults in the household. The garage is not locked during the day, so skua is
considered physically untrusted and holds nothing that is not also on tern.

## Retirement policy

A machine is retired when it has not been powered on for six months. Retirement means: wipe
the storage, remove the reservation from the router, and delete its entry from this document
in the same commit.