# Hypnos

## Overview

15-inch MacBook Pro 11,3 (Mid 2014).

## Specs

- CPU - Intel Core i7-4870HQ @ 2.50GHz
- Memory - 16 GB DDR3
- GPU - Intel Iris Pro 5200
- GPU - NVIDIA GeForce GT 750M
- NIC - Broadcom BCM43xx 802.11ac

### Disks

Device | Partitions _(filesystem, size, usage)_
--- | ---
Apple SSD SM0512F | `/dev/sda1` (EFI, 256 MiB, NixOS Boot) <br> `/dev/sda2` (ZFS, 500 GiB, NixOS Root)

#### ZFS pool layout

```
rpool/
├── local
│   ├── nix
│   ├── root
│   └── state
└── safe
    └── persist
```

See [Graham Christensen's article](https://grahamc.com/blog/nixos-on-zfs/#datasets) for the motivation behind these datasets.

#### Impermanence

This machine uses [impermanence](https://github.com/nix-community/impermanence) and is rolled back to a clean state on each reboot.

Mountpoint | Persists across reboots? | Backed up?
--- | --- | ---
`/` | No | Yes
`/state` | Yes | No
`/persist` | Yes | Yes

### Networks

- DHCP on `10.0.1.0/24` subnet.
- Tailscale on `100.64.0.0/10` subnet. FQDN: `hypnos.mesh.vimium.net`.