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storage: /boot is now mounted ro #237

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Feb 3, 2021
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storage: /boot is now mounted ro #237

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4 changes: 2 additions & 2 deletions modules/ROOT/pages/storage.adoc
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Expand Up @@ -328,7 +328,7 @@ TARGET SOURCE FSTYPE O
|-/etc /dev/vda4[/ostree/deploy/fedora-coreos/deploy/$hash/etc] xfs rw
|-/usr /dev/vda4[/ostree/deploy/fedora-coreos/deploy/$hash/usr] xfs ro
|-/var /dev/vda4[/ostree/deploy/fedora-coreos/deploy/var] xfs rw
`-/boot /dev/vda3 ext4 rw
`-/boot /dev/vda3 ext4 ro
----

The EFI System Partition was formerly mounted on `/boot/efi`, but this is no longer the case. On systems configured with boot device mirroring, there are independent EFI partitions on each constituent disk.
Expand All @@ -337,7 +337,7 @@ The EFI System Partition was formerly mounted on `/boot/efi`, but this is no lon

As OSTree is used to manage all files belonging to the operating system, the `/` and `/usr` mountpoints are not writable. Any changes to the operating system should be applied via https://coreos.github.io/rpm-ostree/administrator-handbook/[`rpm-ostree`].

Similarly, the `/boot` mountpoint and EFI System Partition are managed by `rpm-ostree` and `bootupd`, and changes must not be directly performed by an administrator in those filesystems. `/boot` is not yet mounted as read only but this is expected to change in the future.
Similarly, the `/boot` mountpoint is not writable, and the EFI System Partition is not mounted by default. These filesystems are managed by `rpm-ostree` and `bootupd`, and must not be directly modified by an administrator.

Adding top level directories (i.e. `/foo`) is currently unsupported and disallowed by the immutable attribute.

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