NAME | SYNOPSIS | DESCRIPTION | OPTIONS | PHYSICAL DEVICE OPTIONS | Examples | SEE ALSO | COLOPHON

VGCREATE(8)                System Manager's Manual               VGCREATE(8)

NAME         top

       vgcreate — create a volume group

SYNOPSIS         top

       vgcreate [--addtag Tag] [--alloc AllocationPolicy] [-A|--autobackup
       {y|n}] [-c|--clustered {y|n}] [--commandprofile ProfileName]
       [-d|--debug] [-h|--help] [-l|--maxlogicalvolumes MaxLogicalVolumes]
       [-M|--metadatatype type] [--metadataprofile ProfileName]
       [-p|--maxphysicalvolumes MaxPhysicalVolumes] [--[vg]metadatacopies
       NumberOfCopies|unmanaged|all] [-s|--physicalextentsize
       PhysicalExtentSize[bBsSkKmMgGtTpPeE]] [--reportformat {basic|json}]
       [--shared] [--systemid SystemID] [-t|--test] [-v|--verbose]
       [--version] [PHYSICAL DEVICE OPTIONS] VolumeGroupName
       PhysicalDevicePath [PhysicalDevicePath...]

DESCRIPTION         top

       vgcreate creates a new volume group called VolumeGroupName using the
       block special device PhysicalDevicePath.

       If PhysicalDevicePath was not previously configured for LVM with
       pvcreate(8), the device will be initialized with the same default
       values used with pvcreate(8).  If non-default pvcreate values are
       desired, they may be given on the commandline with the same options
       as pvcreate(8).  See PHYSICAL DEVICE OPTIONS for available options.
       Note that the restore-related options such as --restorefile, --uuid
       and --physicalvolumesize are not available.  If a restore operation
       is needed, use pvcreate(8) and vgcfgrestore(8).

OPTIONS         top

       See lvm(8) for common options.

       -c, --clustered {y|n}
              If clustered locking is enabled, this defaults to y indicating
              that this Volume Group is shared with other nodes in the
              cluster.

              If the new Volume Group contains only local disks that are not
              visible on the other nodes, you must specify --clustered n.
              If the cluster infrastructure is unavailable on a particular
              node at a particular time, you may still be able to use such
              Volume Groups.

       -l, --maxlogicalvolumes MaxLogicalVolumes
              Sets the maximum number of logical volumes allowed in this
              volume group.  The setting can be changed with vgchange(8).
              For volume groups with metadata in lvm1 format, the limit and
              default value is 255.  If the metadata uses lvm2 format, the
              default value is 0 which removes this restriction: there is
              then no limit.

       -p, --maxphysicalvolumes MaxPhysicalVolumes
              Sets the maximum number of physical volumes that can belong to
              this volume group.  The setting can be changed with vgchange.
              For volume groups with metadata in lvm1 format, the limit and
              default value is 255.  If the metadata uses lvm2 format, the
              value 0 removes this restriction: there is then no limit.  If
              you have a large number of physical volumes in a volume group
              with metadata in lvm2 format, for tool performance reasons,
              you should consider some use of --pvmetadatacopies 0 as
              described in pvcreate(8), and/or use --vgmetadatacopies.

       --[vg]metadatacopies NumberOfCopies|unmanaged|all
              Sets the desired number of metadata copies in the volume
              group.  If set to a non-zero value, LVM will automatically
              manage the 'metadataignore' flags on the physical volumes (see
              pvcreate(8) or pvchange --metadataignore) in order to achieve
              NumberOfCopies copies of metadata.  If set to unmanaged, LVM
              will not automatically manage the 'metadataignore' flags.  If
              set to all, LVM will first clear all of the 'metadataignore'
              flags on all metadata areas in the volume group, then set the
              value to unmanaged.  The vgmetadatacopies option is useful for
              volume groups containing large numbers of physical volumes
              with metadata as it may be used to minimize metadata read and
              write overhead.  The default value is unmanaged.

       --metadataprofile ProfileName
              Uses and attaches the ProfileName configuration profile to the
              volume group metadata. Whenever the volume group is processed
              next time, the profile is automatically applied. The profile
              is inherited by all logical volumes in the volume group unless
              the logical volume itself has its own profile attached.  See
              lvm.conf(5) for more information about metadata profiles.

       -s, --physicalextentsize PhysicalExtentSize[bBsSkKmMgGtTpPeE]
              Sets the physical extent size on physical volumes of this
              volume group.  A size suffix (k for kilobytes up to t for
              terabytes) is optional, megabytes is the default if no suffix
              is present. For LVM2 format, the value must be a power of 2 of
              at least 1 sector (where the sector size is the largest sector
              size of the PVs currently used in the VG) or, if not a power
              of 2, at least 128KiB.  For the older LVM1 format, it must be
              a power of 2 of at least 8KiB.  The default is 4 MiB.  Once
              this value has been set, it is difficult to change it without
              recreating the volume group which would involve backing up and
              restoring data on any logical volumes.  However, if no extents
              need moving for the new value to apply, it can be altered
              using vgchange -s.

              If the volume group metadata uses lvm1 format, extents can
              vary in size from 8KiB to 16GiB and there is a limit of 65534
              extents in each logical volume.  The default of 4 MiB leads to
              a maximum logical volume size of around 256GiB.

              If the volume group metadata uses lvm2 format those
              restrictions do not apply, but having a large number of
              extents will slow down the tools but have no impact on I/O
              performance to the logical volume.  The smallest PE is 1KiB

              The 2.4 kernel has a limitation of 2TiB per block device.

       --shared
              Create a shared VG using lvmlockd if LVM is compiled with
              lockd support.
               lvmlockd will select lock type sanlock or dlm depending on
              which lock manager is running.  This allows multiple hosts to
              share a VG on shared devices.  lvmlockd and a lock manager
              must be configured and running.  See lvmlockd(8).

       --systemid SystemID
              Specifies the system ID that will be given to the new VG,
              overriding the system ID of the host running the command.  A
              VG is normally created without this option, in which case the
              new VG is given the system ID of the host creating it.  Using
              this option requires caution because the system ID of the new
              VG may not match the system ID of the host running the
              command, leaving the VG inaccessible to the host.  See
              lvmsystemid(7).

PHYSICAL DEVICE OPTIONS         top

       The following options are available for initializing physical devices
       in the volume group.  These options are further described in the
       pvcreate(8) man page.

       -f, --force

       -y, --yes

       -Z, --zero {y|n}

       --labelsector sector

       --metadatasize size

       --pvmetadatacopies copies

       --dataalignment alignment

       --dataalignmentoffset alignment_offset

Examples         top

       Creates a volume group named "test_vg" using physical volumes
       "/dev/sdk1" and "/dev/sdl1" with default physical extent size of
       4MiB:

       vgcreate test_vg /dev/sdk1 /dev/sdl1

SEE ALSO         top

       lvm(8), pvdisplay(8), pvcreate(8), vgdisplay(8), vgextend(8),
       vgreduce(8), lvcreate(8), lvdisplay(8), lvextend(8), lvreduce(8)

COLOPHON         top

       This page is part of the lvm2 (Logical Volume Manager 2) project.
       Information about the project can be found at 
       ⟨http://www.sourceware.org/lvm2/⟩.  If you have a bug report for this
       manual page, send it to linux-lvm@redhat.com.  This page was obtained
       from the project's upstream Git repository 
       ⟨https://git.fedorahosted.org/git/lvm2.git⟩ on 2017-03-13.  If you
       discover any rendering problems in this HTML version of the page, or
       you believe there is a better or more up-to-date source for the page,
       or you have corrections or improvements to the information in this
       COLOPHON (which is not part of the original manual page), send a mail
       to man-pages@man7.org

Sistina Software UKLVM TOOLS 2.02.169(2)-git (2016-11-30)        VGCREATE(8)