From 5f86a66efdd07e1ff43fb280245e0b7f4744cfca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Sun, 30 Nov 2014 18:29:13 +0100
Subject: [PATCH] doc: Explain that 'file-system' must refer to mapped devices
by file name.
* doc/guix.texi (File Systems): Clarify what to do when mapped devices
are used.
---
doc/guix.texi | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/doc/guix.texi b/doc/guix.texi
index 7c059b923a8..4edaa922e16 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -3731,6 +3731,13 @@ is interpreted as a partition label name; when it is @code{uuid},
The @code{label} and @code{uuid} options offer a way to refer to disk
partitions without having to hard-code their actual device name.
+However, when a file system's source is a mapped device (@pxref{Mapped
+Devices}), its @code{device} field @emph{must} refer to the mapped
+device name---e.g., @file{/dev/mapper/root-partition}---and consequently
+@code{title} must be set to @code{'device}. This is required so that
+the system knows that mounting the file system depends on having the
+corresponding device mapping established.
+
@item @code{flags} (default: @code{'()})
This is a list of symbols denoting mount flags. Recognized flags
include @code{read-only}, @code{bind-mount}, @code{no-dev} (disallow
--
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