1．为主机增加80G SCSI 接口硬盘
2．划分三个各20G的主分区
设备 Boot Start End Blocks Id System
/dev/sde1 2048 41945087 20971520 83 Linux
/dev/sde2 41945088 83888127 20971520 83 Linux
/dev/sde3 83888128 125831167 20971520 83 Linux
3．将三个主分区转换为物理卷（pvcreate），扫描系统中的物理卷
[root@localhost ~]# partprobe
[root@localhost ~]# pvcreate /dev/sde[123]
Physical volume "/dev/sde1" successfully created
Physical volume "/dev/sde2" successfully created
Physical volume "/dev/sde3" successfully created
[root@localhost ~]# pvs
PV VG Fmt Attr PSize PFree
/dev/sda2 centos lvm2 a-- 39.51g 44.00m
/dev/sde1 lvm2 --- 20.00g 20.00g
/dev/sde2 lvm2 --- 20.00g 20.00g
/dev/sde3 lvm2 --- 20.00g 20.00g
4．使用两个物理卷创建卷组，名字为myvg，查看卷组大小
[root@localhost ~]# vgcreate myvg /dev/sde[12]
Volume group "myvg" successfully created
root@localhost ~]# vgdisplay myvg
--- Volume group ---
VG Name myvg
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 2
Act PV 2
VG Size 39.99 GiB
PE Size 4.00 MiB
Total PE 10238
Alloc PE / Size 0 / 0
Free PE / Size 10238 / 39.99 GiB
VG UUID jErgbm-XFFz-EVQ5-rntZ-tE1R-083O-wnRvmF
5．创建逻辑卷mylv，大小为30G
[root@localhost ~]# lvcreate -L 30G -n mylv myvg
Logical volume "mylv" created.
6．将逻辑卷格式化成xfs文件系统，并挂载到/data目录上，创建文件测试
[root@localhost ~]# mkfs.xfs /dev/myvg/mylv
meta-data=/dev/myvg/mylv isize=256 agcount=4, agsize=1966080 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0 finobt=0
data = bsize=4096 blocks=7864320, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
log =internal log bsize=4096 blocks=3840, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
7．增大逻辑卷到35G
[root@localhost ~]# lvextend -L +5G /dev/myvg/mylv
Size of logical volume myvg/mylv changed from 30.00 GiB (7680 extents) to 35.00 GiB (8960 extents).
Logical volume mylv successfully resized
[root@localhost ~]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
root centos -wi-ao---- 37.46g
swap centos -wi-ao---- 2.00g
mylv myvg -wi-a----- 35.00g
8．编辑/etc/fstab文件挂载逻辑卷，并支持磁盘配额选项
[root@localhost ~]# vi /etc/fstab
/dev/myvg/mylv /data xfs auto 0 0