10-04-2015
No space in volume group. How to create a file system using existing logical volume
Hello Guys,
I want to create a file system dedicated for an application installation. But there is no space in volume group to create a new logical volume. There is enough space in other logical volume which is being mounted on /var.
I know we can use that logical volume and create a virtual file system. Unfortunately I couldn't recollect the procedure.
Scenario:
/dev/vg00/lvvar is mounted on /var
I want to use the same logical volume lvvar to create another file system /patrol without dismounting /var. Please let me know the complete procedure..
Thanks in advance
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LEARN ABOUT REDHAT
lvdisplay
LVDISPLAY(8) System Manager's Manual LVDISPLAY(8)
NAME
lvdisplay - display attributes of a logical volume
SYNOPSIS
lvdisplay [-c|--colon] [-d|--debug] [-D|--disk] [-h|--help] [-v[v]|--verbose] LogicalVolumePath [LogicalVolumePath...]
DESCRIPTION
lvdisplay allows you to see the attributes of a logical volume like size, read/write status, snapshot information etc.
OPTIONS
-c, --colon
Generate colon seperated output for easier parsing in scripts or programs.
The values are:
* logical volume name
* volume group name
* logical volume access
* logical volume status
* internal logical volume number
* open count of logical volume
* logical volume size in kilobytes
* current logical extents associated to logical volume
* allocated logical extents of logical volume
* allocation policy of logical volume
* read ahead sectors of logical volume
* major device number of logical volume
* minor device number of logical volume
-d, --debug
Enables additional debugging output (if compiled with DEBUG).
-D, --disk
Show attributes of the volume group descriptor array on disk(s). Without this switch they are derived from kernel space. Useful,
if the volume group isn't active.
-h, --help
Print a usage message on standard output and exit successfully.
-v, --verbose
Display the mapping of logical extents to physical volumes and physical extents.
-vv, --verbose --verbose
Like -v with verbose runtime information.
Examples
"lvdisplay -v /dev/vg00/lvol2" shows attributes of that logical volume and its mapping of logical to physical extents. In case snapshot
logical volumes have been created for this original logical volume, this command shows a list of all snapshot logical volumes and their
status (active or inactive) as well.
"lvdisplay /dev/vg00/snapshot" shows the attributes of this snapshot logical volume and also which original logical volume it is associated
with.
DIAGNOSTICS
lvdisplay returns an exit code of 0 for success or > 0 for error:
1 no logical volume name(s) on command line
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_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), lvcreate(8), lvscan(8), lvmsadc(8),
lvmsar(8)
AUTHOR
Heinz Mauelshagen <Linux-LVM@Sistina.com>
Heinz Mauelshagen LVM TOOLS LVDISPLAY(8)