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32 .Nd "specify zfsboot options for the next boot"
39 .Xr boot.config 5 Ns -style
44 the next time the machine is booted.
49 reads the information, it is deleted.
50 If booting fails, the machine automatically reverts to the previous
52 The information is stored in a special reserved area of a ZFS pool.
56 read the boot option information from the first disk found in the first
59 .Bl -tag -width vfs.zfs.boot.primary_pool -compact
60 .It Ev vfs.zfs.boot.primary_pool
63 variable that identifies a pool for which the options are written.
64 .It Ev vfs.zfs.boot.primary_vdev
67 variable that identifies a disk within the pool where the options
77 .Dl "zfsbootcfg ""zfs:tank/ROOT/newbe:""
79 To clear the boot options:
91 This manual page was written by
92 .An Andriy Gapon Aq Mt avg@FreeBSD.org .
97 .Ev vfs.zfs.boot.primary_pool
99 .Ev vfs.zfs.boot.primary_vdev
101 variables to determine a ZFS pool and a disk in it where the options
103 The variables are set by the ZFS boot chain, so there is an assumption
104 that the same boot disk is going to be used for the next reboot.
107 option to specify a different pool or a different disk.
110 should be extended to install new
112 blocks in a ZFS pool.