11-05-2010
All of that could be learned by reading the documentation. Default extent size is 4M, it's changeable, although with some caveats, and some distributions use other default values when creating a volume group in the installer.
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LEARN ABOUT REDHAT
lvrename
LVRENAME(8) System Manager's Manual LVRENAME(8)
NAME
lvrename - rename a logical volume
SYNOPSIS
lvrename [-A|--autobackup {y|n}] [-d|--debug] [-h|--help] [-v|--verbose] [--version]
{OldLogicalVolumePath NewLogicalVolume{Path|Name} |
VolumeGroupName OldLogicalVolumeName NewLogicalVolumeName}
DESCRIPTION
lvrename renames an existing logical volume from OldLogicalVolume{Name|Path} to NewLogicalVolume{Name|Path}.
OPTIONS
-A, --autobackup {y|n}
Controls automatic backup of VG metadata after the change (see vgcfgbackup(8)). Default is yes.
-d, --debug
Enables additional debugging output (if compiled with DEBUG).
-h, --help
Print a usage message on standard output and exit successfully.
-v, --verbose
Gives verbose progress messages.
EXAMPLE
To rename lvold in volume group vg02 to lvnew:
lvrename /dev/vg02/lvold /dev/vg02/lvnew
An alternate syntax to rename this logical volume is
lvrename vg02 lvold lvnew
DIAGNOSTICS
lvrename returns an exit code of 0 for success or > 0 for error:
1 invalid logical volume name
2 error checking existence of volume group
3 volume group inactive
4 new logical volume special file already exists
5 old logical volume doesn't exist
6 volume group names are different
7 new logical volume already exist
9 error reading volume group
10 error getting index of old logical volume
11 error renaming logical volume in kernel
12 error creating new logical volume in kernel
13 error writing VGDA to physical volume(s)
14 error creating device special for new logical volume
15 invalid volume group name
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
ENVIRONMENT VARIABLES
LVM_AUTOBACKUP
If this variable is set to "no" then the automatic backup of VG metadata is turned off.
LVM_VG_MAX_BACKUPS
This variable determins the backup history depth of kept VGDA copy files in /etc/lvmconf. It can be set to a positive number
between 0 and 999. The higher this number is the more steps are you able to backup with vgcfgrestore(8) from the changes you make
to your volume groups.
LVM_VG_NAME
The default Volume Group Name to use. Setting this variable enables you to enter just the Logical Volume Name rather than its com-
plete path.
SEE ALSO
lvm(8), lvchange(8), vgcreate(8), vgrename(8)
AUTHOR
Heinz Mauelshagen <Linux-LVM@Sistina.com>
Heinz Mauelshagen LVM TOOLS LVRENAME(8)