1：# 查看新添加的磁盘，确认已识别新增的硬盘
[root@localhost ~]# fdisk -l
Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000433db
Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 2611 20458496 8e Linux LVM
Disk /dev/sdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
2：创建分区，并将分区类型修改为8e
[root@localhost ~]# fdisk /dev/sdb
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): n # 创建第1个分区
Command action
e extended
p primary partition (1-4)
p # 选择创建主分区
Partition number (1-4): 1 # 设置第一个主分区编号
First cylinder (1-2610, default 1): 1 # 其实大小
Last cylinder, +cylinders or +size{K,M,G} (1-2610, default 2610):
Using default value 2610
Command (m for help): p # 查看
Disk /dev/sdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x99783bc8
Device Boot Start End Blocks Id System
/dev/sdb1 1 2610 20964793+ 83 Linux
Command (m for help): t # 改变分区类型
Selected partition 1 # 改变第一个分区类型
Hex code (type L to list codes): 8e # 默认是ext格式，LVM分区为8e
Changed system type of partition 1 to 8e (Linux LVM)
Command (m for help): w # 保存退出
The partition table has been altered!
3：将/dev/sdb1 分区转换为物理卷
[root@localhost ~]# pvcreate /dev/sdb1
Physical volume "/dev/sdb1" successfully created
4：将物理卷进行整合，创建名称为”mail_strore"的卷组
[root@localhost ~]# pvscan # 扫描当前系统中的物理卷
PV /dev/sda2 VG VolGroup lvm2 [19.51 GiB / 0 free]
PV /dev/sdb1 lvm2 [19.99 GiB]
Total: 2 [39.50 GiB] / in use: 1 [19.51 GiB] / in no VG: 1 [19.99 GiB]
[root@localhost ~]# vgcreate mail_strore /dev/sdb1 #使用物理卷创建卷组
Volume group "mail_strore" successfully created
# 扩展知识
[root@localhost ~]# vgcreate mail_strore /dev/sdb1 /dev/sdc1 #将多块物理卷整合，并创建mail_strore卷组
Volume group "mail_strore" successfully created
5：在"mail_strore"卷组中创建名为”mail“的逻辑卷，设置容量为10G
[root@localhost ~]# vgscan | grep "mail_strore" # 扫描当前卷组
Found volume group "mail_strore" using metadata type lvm2
[root@localhost ~]# lvcreate -L 10G -n mail mail_strore # 在mail_strore中创建10G的逻辑卷，名称为mail
Logical volume "mail" created
6：进行初始化，并挂载到mail 目录下
[root@localhost ~]# mkfs.xfs /dev/mail_strore/mail
meta-data=/dev/mail_strore/mail isize=256 agcount=4, agsize=655360 blks
= sectsz=512 attr=2, projid32bit=0
data = bsize=4096 blocks=2621440, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal log bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
[root@localhost ~]# mkdir /mail
[root@localhost ~]# mount /dev/mail_strore/mail /mail
[root@localhost ~]# df -hT
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root ext4 18G 870M 16G 6% /
tmpfs tmpfs 491M 0 491M 0% /dev/shm
/dev/sda1 ext4 485M 32M 428M 7% /boot
/dev/mapper/mail_strore-mail xfs 10G 33M 10G 1% /mail
7：知识补充：可以动态进行扩容磁盘大小
[root@localhost ~]# lvextend -L +5G /dev/mail_strore/mail
Extending logical volume mail to 15.00 GiB
Logical volume mail successfully resized
[root@localhost ~]# lvdisplay /dev/mail_strore/mail # 查看扩展后的逻辑卷大小
--- Logical volume ---
LV Path /dev/mail_strore/mail
LV Name mail
VG Name mail_strore
LV UUID C9IDSD-tfTB-VBge-juUA-Aod9-TjAn-1YAV2r
LV Write Access read/write
LV Creation host, time localhost.localdomain, 2020-03-08 13:26:18 +0800
LV Status available
# open 1
LV Size 15.00 GiB
Current LE 3840
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
# 验证磁盘大小并未增加
[root@localhost ~]# df -hT
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root ext4 18G 870M 16G 6% /
tmpfs tmpfs 491M 0 491M 0% /dev/shm
/dev/sda1 ext4 485M 32M 428M 7% /boot
/dev/mapper/mail_strore-mail xfs 10G 33M 10G 1% /mail
# 执行相应的命令
[root@localhost ~]# xfs_growfs /dev/mail_strore/mail
meta-data=/dev/mapper/mail_strore-mail isize=256 agcount=4, agsize=655360 blks
= sectsz=512 attr=2, projid32bit=0
data = bsize=4096 blocks=2621440, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 2621440 to 3932160
# 再次验证
[root@localhost ~]# df -hT
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root ext4 18G 870M 16G 6% /
tmpfs tmpfs 491M 0 491M 0% /dev/shm
/dev/sda1 ext4 485M 32M 428M 7% /boot
/dev/mapper/mail_strore-mail xfs 15G 33M 15G 1% /mail
8：知识补充,将xfs格式转换为ext4格式
# 卸载
[root@localhost ~]# umount /dev/mail_strore/mail /mail/
# 验证
[root@localhost ~]# df -hT
# 删除/dev/mail_strore/mail 逻辑卷
[root@localhost ~]# lvremove /dev/mail_strore/mail
Do you really want to remove active logical volume mail? [y/n]: y
Logical volume "mail" successfully removed
# 扫描卷组
[root@localhost ~]# vgscan
Reading all physical volumes. This may take a while...
Found volume group "mail_strore" using metadata type lvm2
Found volume group "VolGroup" using metadata type lvm2
# 创建10G的逻辑卷，名称为：mail
[root@localhost ~]# lvcreate -L 10G -n mail mail_strore
# 查看
[root@localhost ~]# lvdisplay
# 初始化
[root@localhost ~]# mkfs.ext4 /dev/mail_strore/mail
# 挂载
[root@localhost ~]# mount /dev/mail_strore/mail /mail
# 动态扩展
[root@localhost ~]# lvextend -L +5G /dev/mail_strore/mail
# 重新加载
[root@localhost ~]# resize2fs /dev/mail_strore/mail
# 再次验证
[root@localhost ~]# df -hT