Provided by: lvm2_2.02.66-4ubuntu7_amd64 bug

NAME

       vgcreate - create a volume group

SYNOPSIS

       vgcreate [--addtag Tag] [--alloc AllocationPolicy] [-A|--autobackup {y|n}] [-c|--clustered
       {y|n}]     [-d|--debug]     [-h|--help]     [-l|--maxlogicalvolumes     MaxLogicalVolumes]
       [-M|--metadatatypetype]            [-p|--maxphysicalvolumes            MaxPhysicalVolumes]
       [-s|--physicalextentsize PhysicalExtentSize[bBsSkKmMgGtTpPeE]] [-t|--test]  [-v|--verbose]
       [--version]    [    PHYSICAL   DEVICE   OPTIONS   ]   VolumeGroupName   PhysicalDevicePath
       [PhysicalDevicePath...]

DESCRIPTION

       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.   If  non-default
       pvcreate  values  are  are  desired,  they  may  be given on the commandline with the same
       options as pvcreate.  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

       See lvm 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.  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
              default value is 0 which 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).

       -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.  The default is 4 MB and it must be at least 1 KB
              and a power of 2.

              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 8KB to
              16GB and there is a limit of 65534 extents in each logical volume.  The default  of
              4 MB leads to a maximum logical volume size of around 256GB.

              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 1KB.

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

PHYSICAL DEVICE OPTIONS

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

       -f, --force

       -y, --yes

       -Z, --zero y|n

       --labelsector sector

       --metadatasize size

       --pvmetadatacopies copies

       --dataalignment alignment

       --dataalignmentoffset alignment_offset

EXAMPLES

       To create a volume group named test_vg using physical  volumes  /dev/sdk1,  and  /dev/sdl1
       with default physical extent size of 4MB:

            vgcreate test_vg /dev/sdk1 /dev/sdl1

SEE ALSO

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