HP-UX Reference (11i v2 03/08) - 1M System Administration Commands N-Z (vol 4)
v
vgcreate(1M) vgcreate(1M)
NAME
vgcreate - create LVM volume group
SYNOPSIS
/usr/sbin/vgcreate
[-f][-A autobackup ][
-x extensibility][
-e max_pe][-l max_lv]
[
-p max_pv][-s pe_size][
-g pvg_name] vg_name pv_path ...
DESCRIPTION
The
vgcreate command creates a new volume group. vg_name is a symbolic name for the volume
group and must be used in all references to it. vg_name is the path to a directory entry under
/dev that
must contain a character special file named
group. Except for the group entry, the vg_name directory
should be empty. The vg_name directory and the
group file have to be created by the user (see lvm(7)).
vgcreate leaves the volume group in an active state.
Before assigning a physical volume to a volume group, the physical volume has to be created using the
pvcreate command (see pvcreate (1M)).
If
vgcreate fails to install the first specified physical volume into the volume group, the volume group
is not created. If, for any reason, one of the remaining specified physical volumes cannot be installed into
the volume group, an error message is printed, but the installation continues until the end of the list of
physical volumes.
Options and Arguments
vgcreate recognizes the following options and arguments:
pv_path The block device path name of a physical volume that will be assigned to the
new volume group. On PA-RISC systems, pv_path should be the path name
for the whole disk. For Itanium(R)-based system boot physical volumes,
pv_path should be the path name for the disk section containing the HP-UX
partition. For Itanium-based system non-boot physical volumes, pv_path can
be the path name for the whole disk or the disk section containing the HP-UX
partition. You can specify physical volume links pv-links for a physical
volume providing different paths that reference the same physical volume in
the pv_path list. The order in which the paths are listed is important. The
first path becomes the
primary link to the physical volume, and the
second becomes an alternate link to the physical volume. The primary
link is the default path used to access the physical volume. If the primary
link becomes unavailable, LVM automatically switches to the
alternate
link to access the physical volume. Currently, LVM supports a maximum of
8 paths to a physical volume (7 alternate and one primary).
vg_name The path name of a subdirectory of the
/dev directory. vg_name must be
empty except for a character special file named group. Typically, this direc-
tory name is in the form /dev/vgNN, where NN numbers sequentially from
00.
-A autobackup Set automatic backup for this invocation of this command. autobackup can
have one of the following values:
y Automatically back up configuration changes made to the volume
group. This is the default.
After this command executes, the
vgcfgbackup command (see
vgcfgbackup (1M)) is executed for the volume group.
n Do not back up configuration changes this time.
-e max_pe Set the maximum number of physical extents that can be allocated from any of
the physical volumes in the volume group. The default value for max_pe is
1016. However, if the size of any physical volume exceeds 1016 times the
pe_size, the default value for max_pe is adjusted to match the physical volume
size. The maximum number of physical extents can be a value in the range 1
to 65535.
-f This option will force a volume group to be created with a physical volume
which has alternate block(s) already allocated, (i.e. this physical volume was
not initialized using pvcreate -f.) This option should be used with
HP-UX 11i Version 2: August 2003 − 1 − Hewlett-Packard Company Section 1M−−859