Continuation...... of Logical Volume Management.
Command options:
lvchange Change the attributes of logical
volume(s)
lvconvert Change logical volume layout
lvcreate Create a logical volume
lvdisplay Display information about a logical
volume
lvextend Add space to a logical volume
lvmchange With the device mapper, this is obsolete and
does nothing.
lvmdisks can List devices that may be used as
physical volumes
lvmsadc Collect activity data
lvmsar Create activity report
lvreduce Reduce the size of a logical volume
lvremove Remove logical volume(s) from the system
lvrename Rename a logical volume
lvresize Resize a logical volume
lvs Display information about
logical volumes
lvscan List all logical volumes
in all volume groups
# lvm - to
enter into the logical volume mode
#
lvrename - to rename the lv name
#
lvremove - to delete the LV
# lvmdump - to collect all the information about LV’s,
VG’s and PV’s
#
lvmdiskscan - to see LV’s, VG’s and PV’s info with
size
# lvs - to check logical volumes info
# lvcreate –size 100m –snapshot –name snap
/dev/data/lv0 - creates a
snapshot logical volume named /dev/data/snap which has access to the contents
of the original logical volume
named /dev/data/lv0 at snapshot logical volume creation time. If the
original logical volume contains a file system, you can mount the snapshot logical
volume on an
arbitrary directory in order
to access the
contents of the file system to
run a backup while the original file system continues to get updated.
#
mkfs.ext3 /dev/data/lv0 - to make file
system in lv
# mount
<lv path> <mount point> -
to mount the lv
To
example of snapshot
To
restore the snapshot data mount the snapshot to mount point and copy the files
from snapshot to original path
In order
to delete the logical volume
#umount
/lv0
#lvremove
/dev/data/lv0
#vgremove
data
#pvremove
/dev/sdb1
#pvremove
/dev/sdb2
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