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-rw-r--r--doc/guix.texi9
1 files changed, 7 insertions, 2 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 92971a531c..42691570ff 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -35162,6 +35162,11 @@ $ $(guix system vm my-config.scm) -m 1024 -smp 2 -nic user,model=virtio-net-pci
The VM shares its store with the host system.
+By default, the root file system of the VM is mounted volatile; the
+@option{--persistent} option can be provided to make it persistent
+instead. In that case, the VM disk-image file will be copied from the
+store to the @env{TMPDIR} directory to make it writable.
+
Additional file systems can be shared between the host and the VM using
the @option{--share} and @option{--expose} command-line options: the former
specifies a directory to be shared with write access, while the latter
@@ -35199,8 +35204,8 @@ QEMU monitor and the VM.
@cindex Creating system images in various formats
@item image
@cindex image, creating disk images
-The @code{image} command can produce various image types. The
-image type can be selected using the @option{--image-type} option. It
+The @code{image} command can produce various image types. The image
+type can be selected using the @option{--image-type} option. It
defaults to @code{efi-raw}. When its value is @code{iso9660}, the
@option{--label} option can be used to specify a volume ID with
@code{image}. By default, the root file system of a disk image is