Sun Microsystems StorEdge 3000 Series, Installation, Operation And Service Manual

Page: 299 / 318

Appendix J Configuring an HP Server Running the HP-UX Operating Environment J-9
In the output of
vgdisplay
, the Total PE field gives the number of physical extents
in the volume group.
The size of each physical extent is given in the PE Size field (the default is 4 MB), so
the total capacity of this volume group is 2167 x 4 MB = 8668 MB.
The Alloc PE field shows the number of physical extents allocated to logical
volumes. At this point, the Alloc PE field is zero because we have not assigned any
of this volume group’s capacity to logical volumes.
J.8 Creating a Logical Volume
To create a logical volume within the volume group, use the
lvcreate
command
with the
-L
option to specify the size of the logical volume in megabytes. The
logical volume size should be a multiple of the physical extent size. In this example,
a logical volume of 4092 MB is created:
Both character and block device files for the new logical volume are created in the
volume group directory:
Applications should use these names to access the logical volumes. Unless you
specify otherwise, HP-UX creates names in the form shown in the example. To
specify custom names for logical volumes see
vgcreate
(1M).
PE Size (Mbytes) 4
Total PE 2167
Alloc PE 0
Free PE 2167
Total PVG 0
# lvcreate -L 4092 /dev/vg02
# ls /dev/vg02
group lvol1 rlvol1