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 vgimport(1M)							vgimport(1M)




 NAME
      vgimport - import an LVM volume group onto the system

 SYNOPSIS
      /usr/sbin/vgimport [-m mapfile] [-p] [-v] [-f infile] vg_name pv_path
      ...

      /usr/sbin/vgimport -m mapfile -s -v vg_name

 DESCRIPTION
      The vgimport command adds the specified volume group to the system.
      The physical volumes, specified as pv_path ..., are scanned to obtain
      the volume group information and logical volume information.  This
      command works much like vgcreate by requiring that the volume group
      device directory and the group special file be created before the
      command is executed (see vgcreate(1M)).  The vg_name is added from the
      /etc/lvmtab file, and the associated logical volume device files are
      added to the system.

      vgimport assumes that the volume group information has already been
      created on the physical volumes.

      This command is useful in conjunction with the vgexport command (see
      vgexport(1M)), to move volume groups from one system to other systems
      within a high availability cluster.

      vgimport creates logical volume devices files under the vg_name
      directory using the naming convention given in mapfile or using the
      default naming convention used by the lvcreate command (see
      lvcreate(1M)).

    Sharable Option, Series 800 Only
      In the second format of the command line shown in SYNOPSIS, the volume
      group specified in the mapfile is shared.

      vgimport does not activate the imported volume group due to the many
      possible options at volume group activation time.	 To activate the
      volume group once it has been successfully imported, use the vgchange
      command (see vgchange(1M)).

    Options and Arguments
      vgimport recognizes the following options and arguments:

	   pv_path	  The block device path names of a physical volume.
			  This argument is not used with the -s and related
			  options.

	   vg_name	  The path name of the volume group.

	   -m mapfile	  Specify the name of the file from which logical
			  volume names and numbers are to be read.  This



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 vgimport(1M)							vgimport(1M)




			  option is optional when used as in the first
			  command line format of the SYNOPSIS.	If this
			  option is not specified, logical volume names are
			  created using the default naming convention lvolnn
			  where nn is the logical volume minor number.	When
			  used with the -s option, the volume group
			  specified in the mapfile can be shared among the
			  exporting system and the importing systems.

	   -s		  Sharable option, Series 800 only.  When the -s
			  option is specified, then the -p, -v, and -m
			  options must also be specified.  The specified
			  mapfile is the same mapfile specified by using the
			  vgexport command also using the -p, -m, and -s
			  options.  The mapfile is used to create the volume
			  groups on the importing systems.

	   -p		  Preview the actions to be taken but do not update
			  the /etc/lvmtab file or add the devices file.
			  This option is best used in conjunction with the
			  -v option.

	   -v		  Print verbose messages including names of the
			  logical volumes.

	   -f infile	  Import the set of pv_paths held in the infile into
			  the volume group.  This option is used as an
			  alternative to specifying the pv_paths on the
			  command line. Each pv_path must appear on a new
			  line in the infile.  This option may not be used
			  together with the -s option.

 WARNINGS
      The following warnings should only apply to the -s option when
      importing devices such as (NIKE) or disks with alternate path:

      Since the -s option causes a search on the system for each disks with
      the same vg_id.  When vgimport reconstruct the newly imported volume
      group entry in /etc/lvmtab file, the order of disks could be different
      than it was before.  And the following will happen:

	   The designated primary and alternate link might not be the same
	   as it was configured before.

	   Alternate links will be added to the importing volume group even
	   if they might not be configured in the volume group initially.

      If the original primary path of a disks become an alternate path after
      the newly imported volume group entry is created in /etc/lvmtab, the
      order can be easily reverted by using vgreduce to remove the primary
      path and then use vgextend to add the path back again.



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 vgimport(1M)							vgimport(1M)




      If additional alternate paths were added to the newly imported volume
      group, use vgreduce to reduce any alternate paths that were added but
      they were not needed.

 ADDITIONAL WARNINGS
      Starting at 10.20, the vgimport command is supporting additional EMC
      Symmetrix disk product functionality (see vgchgid(1M)).  The vgimport
      command will be enforcing a new rule such that the group of disks to
      be imported must have the same EMC Symmetrix attributes.	Clearly this
      checking only applies if the disks involved in the operation are EMC
      Symmetrix.  Should the command find an incompatibility, a message of
      the following type will be produced:

	   "Attempt to mix incompatible EMC Symmetrix disk types failed.
	   Physical volume /dev/dsk/cxtxdx is EMC BCV disk, but physical
	   volume /dev/dsk/cxtxdx is a standard disk.  Please consult the
	   EMC Symmetrix documentation, if applicable".

      If duplicate VGIDs (volume group id) were found in different types of
      EMC Symmetrix disks during the vgimport -s operation, the above error
      message will appear, and the command will fail.  Please refer to
      vgchgid(1M) on how to modify VGID on the EMC Symmetrix disk.

      Note that EMC Symmetrix disks which do not have any of the additional
      attributes can still be mixed with non-EMC disks in a single volume
      group.

    Cross-Cabinet Volume Group Warnings
      On multi-cabinet V-Class systems, it is possible to create a volume
      group using physical volumes that are physically attached to different
      cabinets.	 However, due to limitations in the HP-UX boot sequence,
      such a cross-cabinet volume group cannot contain root, boot, swap, or
      dump logical volumes.  If the physical volumes specified by pv_path
      make up a cross-cabinet volume group that contains a root, boot, swap,
      or dump logical volume, then vgimport will fail to import that volume
      group.  This should only occur as the result of a hardware
      reconfiguration.	If this does occur, the hardware configuration will
      need to be modified again to connect the physical volumes to the same
      cabinet.

 EXTERNAL INFLUENCES
    Environment Variables
      LANG determines the language in which messages are displayed.

      If LANG is not specified or is null, it defaults to "C" (see lang(5)).

      If any internationalization variable contains an invalid setting, all
      internationalization variables default to "C" (see environ(5)).

 EXAMPLES
      Import the volume group /dev/vg01 that is located on physical disks



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 vgimport(1M)							vgimport(1M)




      /dev/dsk/c0t1d0 and /dev/dsk/c0t3d0:

	   vgimport -v /dev/vg01 /dev/dsk/c0t1d0 /dev/dsk/c0t3d0

      Activate the volume group following a successful import:

	   vgchange -a y vg01

      Import the volume group /dev/vg01 using the mapfile, /tmp/vg01.mymap.
      mymap was previously specified by the vgexport command on another
      system.  The volume group, /dev/vg01, is specified in mymap and will
      be used by the importing system only:

	   vgimport -v -m /tmp/vg01.mapfile /dev/vg01 \
	   /dev/dsk/c0t5d0 /dev/dsk/c0t7d0

      Import the volume group /dev/vg02 using the mapfile, /tmp/vg02.mymap.
      mymap was previously specified by the vgexport command on another
      system.  The volume group, /dev/vg02, is specified in mymap and will
      be shared among the exporting system, this system, and other systems
      importing the volume group as shared:

	   vgimport -v -s -m /tmp/vg02.mymap /dev/vg02

      Import the volume group /dev/vg02 using the infile, /tmp/vg02.infile.
      infile was previously specified by the vgexport command on another
      system.

	   vgimport -v -f /tmp/vg02.infile /dev/vg02

 SEE ALSO
      vgexport(1M), vgscan(1M).






















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