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= User Partition
:page-parent: Development
:page-nav_order: 2

// SPDX-FileCopyrightText: 2022 Alyssa Ross <hi@alyssa.is>
// SPDX-License-Identifier: GFDL-1.3-no-invariants-or-later OR CC-BY-SA-4.0

The Spectrum host system is immutable, so configuration and user data
lives on a separate partition.

The host system discovers the user
partition by looking for the special partition type
`9293e1ff-cee4-4658-88be-898ec863944f`.

This behavior can be overridden with the `ext` parameter on the host's kernel
command line, which works in a similar way to the standard Linux `root`
parameter.