HP-UX Reference (11i v3 07/02) - 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 (see model(1) and
getconf(1)). 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 alter-
nate link
to the physical volume. The primary link is the default path
used to access the physical volume. (see WARNINGS section). 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 directory
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.
626 Hewlett-Packard Company − 1 − HP-UX 11i Version 3: February 2007