002. LVM Creation

1. LVM creation procedure

1. Create a partition
2. Create PV
3. Create VG
4. Create LV
5. Format and Mount

Ii. Create a partition

Use a partitioning tool (such as fdisk) to create LVM partitions, but identify the partitions as 8E of the LVM partition type.

  1 [[email protected] ~]# fdisk -l  2 ……  3    Device Boot      Start         End      Blocks   Id  System  4 /dev/sdb1            2048    20971519    10484736    5  Extended  5 /dev/sdb5            4096     2101247     1048576   8e  Linux LVM  6 /dev/sdb6         2103296     4200447     1048576   8e  Linux LVM

3. Create pv3.1 create PV

1 [[email protected] ~] # Pvcreate/dev/sdb5 # convert each partition to PV 2 physical volume "/dev/sdb5" successfully created 3 [email protected] ~] # Pvcreate/dev/sdb6 4 physical volume "/dev/sdb6" successfully created

3.2 view Verification

  1 [[email protected] ~]# pvdisplay  2   ……

4. Create vg4.1 and create VG

1 [[email protected] ~] # Vgcreate-s 16 m vg01/dev/sdb5/dev/sdb6/dev/sdb7 2 # create a VG group named vg01, modify PE to 16 m 3 volume group "vg01" successfully created

4.2 view Verification

Omitted

Note: LVM uses a 4 mb pe block by default. The default lvm vg has 4 M * 65534/(1024 m/g) = 256g.

5. Create lv5.1 create LV

  1 [[email protected] ~]# lvcreate -L 1g -n lv01 vg01  2   Logical volume "lv01" created.

5.2 view Verification

  1 [[email protected] ~]# lvdisplay

6. Format and mount the 6.1 format

1 [[email protected] ~] # Mkfs. XFS/dev/vg01/lv01 # format to the corresponding format 2 meta-data =/dev/vg01/lv01 isize = 256 agcount = 4, agsize = 65536 blks 3 = sectsz = 512 ATTR = 2, projid32bit = 1 4 = CRC = 0 finobt = 0 5 Data = bsize = 4096 blocks = 262144, imaxpct = 25 6 = Sunit = 0 swidth = 0 blks 7 naming = version 2 bsize = 4096 ascii-CI = 0 FTYPE = 0 8 log = internal log bsize = 4096 blocks = 2560, version = 2 9 = sectsz = 512 Sunit = 0 blks, lazy-Count = 1 10 realtime = none extsz = 4096 blocks = 0, rtextents = 0

6.2 Mount

1 [[email protected] ~] # Mkdir/root/mylv01 # create a directory for mounting 2 [email protected] ~] # Mount/dev/vg01/lv01/root/mylv01/# mount to the corresponding directory 3 [email protected] ~] # DF-h # view and verify 4 filesystem size used avail use % mounted on 5 ...... 6/dev/mapper/vg01-lv01 1014 m 33 m 982 M 4%/root/mylv01

6.3 boot mounting

1 [[email protected] ~] # Vi/etc/fstab 2/dev/vg01/lv01/root/mylv01xfsdefaults0 0 # change to boot mounting

002. LVM Creation