12-06-2010
The LVM docs haven't been fully updated from LVM1 to LVM2.
According to the official LVM howto, the default extent size is now 32M.
I can't post URLs yet, so here's a quote, search on it (in quotes) to get a confirmation:
>> You can also specify the extent size with this command if the default of 32MB is not suitable for you with the '-s' switch. In addition you can put some limits on the number of physical or logical volumes the volume can have.
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LEARN ABOUT REDHAT
pvdisplay
PVDISPLAY(8) System Manager's Manual PVDISPLAY(8)
NAME
pvdisplay - display attributes of a physical volume
SYNOPSIS
pvdisplay [-c|--colon] [-d|--debug] [-h|--help] [-s|--short] [-v[v]|--verbose [--verbose]] PhysicalVolumePath [PhysicalVolumePath...]
DESCRIPTION
pvdisplay allows you to see the attributes of one or more physical volumes like size, physical extent size, space used for the volume group
descriptor area and so on.
OPTIONS
-c, --colon
Generate colon seperated output for easier parsing in scripts or programs.
The values are:
* physical volume device name
* volume group name
* physical volume size in kilobytes
* internal physical volume number
* physical volume status
* physical volume (not) allocatable
* current number of logical volumes on this physical volume
* physical extent size in kilobytes
* total number of physical extents
* free number of physical extents
* allocated number of physical extents
-d, --debug
Enables additional debugging output (if compiled with DEBUG).
-h, --help
Print a usage message on standard output and exit successfully.
-s, --short
Only display the size of the given physical volumes.
-v, --verbose
Display the mapping of physical extents to logical volumes and logical extents.
-vv, --verbose --verbose
Like -v with verbose runtime information about pvdisplay's activities.
DIAGNOSTICS
pvdisplay returns an code state of 0 for success and > 0 for error:
1 no physical volume name on command line
2 error checking consistency of physical volume
3 error reading physical extent information from physical volume
95 driver/module not in kernel
96 invalid I/O protocol version
97 error locking logical volume manager
98 invalid lvmtab (run vgscan(8))
99 invalid command line
See also
lvm(8), pvcreate(8), lvcreate(8), vgcreate(8)
AUTHOR
Heinz Mauelshagen <Linux-LVM@Sistina.com>
Heinz Mauelshagen LVM TOOLS PVDISPLAY(8)