13.磁盘逻辑卷管理

概述

实践

查看盘

命令 lsblk

[root@ks2p-hadoop04 ~]# lsblk
NAME            MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sdb               8:16   0 447.1G  0 disk 
├─sdb1            8:17   0   200M  0 part /boot/efi
├─sdb2            8:18   0     1G  0 part /boot
└─sdb3            8:19   0   116G  0 part ├─centos-root 253:0    0   100G  0 lvm  /└─centos-swap 253:1    0    16G  0 lvm  [SWAP]
sdc               8:32   0   2.2T  0 disk 
└─vgdata-data   253:2    0   2.2T  0 lvm  /data
[root@ks2p-hadoop04 ~]# # 分区、删除分区
fdisk /dev/sdb
# 将 /dev/sdb 变成物理卷
pvcreate /dev/sdb
Physical volume "dev/sdb" successfully created.
[root@ks2p-hadoop04 ~]# pvscan/dev/sda: open failed: No medium foundPV /dev/sdb3   VG centos          lvm2 [116.00 GiB / 0    free]PV /dev/sdc    VG vgdata          lvm2 [2.18 TiB / 13.48 GiB free]Total: 2 [<2.30 TiB] / in use: 2 [<2.30 TiB] / in no VG: 0 [0   ]
[root@ks2p-hadoop04 ~]# # 将物理卷做成 vg 卷组
vgcreate test-vg-1 /dev/sdc  /dev/sdd
Volume group "test-vg-1" successfully created.
vgdisplay