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| author | sobomax <sobomax@FreeBSD.org> | 2016-04-08 00:24:21 +0000 |
|---|---|---|
| committer | sobomax <sobomax@FreeBSD.org> | 2016-04-08 00:24:21 +0000 |
| commit | 06e191b1f4d4f394459831c03a262c065f6251d9 (patch) | |
| tree | 031fc94c5d95d6637e1d417d4fa1fc868f7551f1 /sys/boot/forth | |
| parent | e5d329425c99d560a97d702594adc136edeba1dc (diff) | |
| download | FreeBSD-src-06e191b1f4d4f394459831c03a262c065f6251d9.zip FreeBSD-src-06e191b1f4d4f394459831c03a262c065f6251d9.tar.gz | |
Document vfs.root.mountfrom.
Reviewed by: imp, wblock
Differential Revision: https://reviews.freebsd.org/D5332
Diffstat (limited to 'sys/boot/forth')
| -rw-r--r-- | sys/boot/forth/loader.conf.5 | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/sys/boot/forth/loader.conf.5 b/sys/boot/forth/loader.conf.5 index 0320e98..631250c 100644 --- a/sys/boot/forth/loader.conf.5 +++ b/sys/boot/forth/loader.conf.5 @@ -112,6 +112,31 @@ The name must be a subdirectory of that contains a kernel. .It Ar kernel_options Flags to be passed to the kernel. +.It Ar vfs.root.mountfrom +Specify the root partition to mount. +For example: +.Pp +.Dl vfs.root.mountfrom="ufs:/dev/da0s1a" +.Pp +.Xr loader 8 +automatically calculates the value of this tunable from +.Pa /etc/fstab +from the partition the kernel was loaded from. +The calculated value might be calculated incorrectly when +.Pa /etc/fstab +is not available during +.Xr loader 8 +startup (as during diskless booting from NFS), or if a different +device is desired by the user. +The preferred value can be set in +.Pa /loader.conf . +.Pp +The value can also be overridden from the +.Xr loader 8 +command line. +This is useful for system recovery when +.Pa /etc/fstab +is damaged, lost, or read from the wrong partition. .It Ar password Protect boot menu with a password without interrupting .Ic autoboot |
