FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/man/man8/zpool-split.8

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    .Dd June 2, 2021
    .Dt ZPOOL-SPLIT 8
    .Os
    .
    .Sh NAME
    .Nm zpool-split
    .Nd split devices off ZFS storage pool, creating new pool
    .Sh SYNOPSIS
    .Nm zpool
    .Cm split
    .Op Fl gLlnP
    .Oo Fl o Ar property Ns = Ns Ar value Oc Ns …
    .Op Fl R Ar root
    .Ar pool newpool
    .Oo Ar device Oc Ns …
    .
    .Sh DESCRIPTION
    Splits devices off
    .Ar pool
    creating
    .Ar newpool .
    All vdevs in
    .Ar pool
    must be mirrors and the pool must not be in the process of resilvering.
    At the time of the split,
    .Ar newpool
    will be a replica of
    .Ar pool .
    By default, the
    last device in each mirror is split from
    .Ar pool
    to create
    .Ar newpool .
    .Pp
    The optional device specification causes the specified device(s) to be
    included in the new
    .Ar pool
    and, should any devices remain unspecified,
    the last device in each mirror is used as would be by default.
    .Bl -tag -width Ds
    .It Fl g
    Display vdev GUIDs instead of the normal device names.
    These GUIDs can be used in place of device names for the zpool
    detach/offline/remove/replace commands.
    .It Fl L
    Display real paths for vdevs resolving all symbolic links.
    This can be used to look up the current block device name regardless of the
    .Pa /dev/disk/
    path used to open it.
    .It Fl l
    Indicates that this command will request encryption keys for all encrypted
    datasets it attempts to mount as it is bringing the new pool online.
    Note that if any datasets have
    .Sy keylocation Ns = Ns Sy prompt ,
    this command will block waiting for the keys to be entered.
    Without this flag, encrypted datasets will be left unavailable until the keys
    are loaded.
    .It Fl n
    Do a dry-run
    .Pq Qq No-op
    split: do not actually perform it.
    Print out the expected configuration of
    .Ar newpool .
    .It Fl P
    Display full paths for vdevs instead of only the last component of
    the path.
    This can be used in conjunction with the
    .Fl L
    flag.
    .It Fl o Ar property Ns = Ns Ar value
    Sets the specified property for
   .Ar newpool .
   See the
   .Xr zpoolprops 7
   manual page for more information on the available pool properties.
   .It Fl R Ar root
   Set
   .Sy altroot
   for
   .Ar newpool
   to
   .Ar root
   and automatically import it.
   .El
   .
   .Sh SEE ALSO
   .Xr zpool-import 8 ,
   .Xr zpool-list 8 ,
   .Xr zpool-remove 8

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