Basic use of LVM

LVM hierarchy (bottom to top): ext3-& gt; lv (logicalvolumn)-& gt; pv (physicalvolumn)-& gt; vg (volumngroup) LVM creation steps (for example, creating LVM on/dev/sdb): 1. format the hard disk: fdisk/dev/sdbn: create a new disk...

 

LVM hierarchy (bottom to top ):

Ext3-> lv (logical volumn)-> pv (physical volumn)-> vg (volumn group)

 

LVM creation steps (for example, creating LVM on/dev/sdb ):

1. format the hard disk: fdisk/dev/sdb

N: create a new disk partition (which can be a primary partition or an extended partition)

T: change the partition to the Linux LVM format. the format is 8e.

W: write and modify the above operations

 

2. create pv: pvcreate/dev/sdb1

3. create vg: vgcreate testvg/dev/sdb1

4. create lv: lvcreate-L20G-n testlv testvg

5. format lv: mkfs. ext3/dev/testvg/testlv

6. Complete

 

It is not recommended to use the lvreduce command to narrow down the lv partition. after multiple attempts, errors often occur in e2fsck-f.

 

Use the lvextend command to expand the lv partition:

1. lvextend-L + 20G/dev/testvg/testlv

2. e2fsck-f/dev/testvg/testlv

3. resize2fs/dev/testvg/testlv