RAID,LVM牛逼功能及用法
发表于：2025-01-20 作者：千家信息网编辑
千家信息网最后更新 2025年01月20日，一、高级文件系统管理1） 设定文件系统配额2） 设定和管理软RAID设备3） 配置逻辑卷4） 设定LVM快照5） btrfs文件系统二、配置磁盘配额演示步骤如下：1、分区挂载将/home目录下的所有文
千家信息网最后更新 2025年01月20日RAID,LVM牛逼功能及用法
一、高级文件系统管理
1） 设定文件系统配额
2） 设定和管理软RAID设备
3） 配置逻辑卷
4） 设定LVM快照
5） btrfs文件系统
二、配置磁盘配额
演示步骤如下：
1、分区挂载将/home目录下的所有文件拷贝至/dev/sdc1
fdsik /dev/sdc
mount /dec/sdc1 /mnt/test
mv /home/* /mnt/test
mount /dev/sdc1 /home
2、启动配额挂载选项
/dev/sdc1 /mnt/test ext4 defaults 0 0
/dev/sdc1 /home ext4 usrquota,grpquota 0 0
3、启动数据库,如遇到报错则关闭防火墙及重新挂载(mount -0 remount usrquota,grpquota)
setenforce 0 #临时关闭selinux
getenforce #查看selinux状态
quotacheck -cug /home #创建磁盘配额数据库
4、启动数据库
quotaon -p /home #查看是否已启动数据库
quotaon /home #启动数据库
repquota /home #报告各个家目录下用户的默认磁盘配额
5、配置配额项
edquota alren #给alren用户配置配额
setquota alren 100000 150000 0 0 /home
6、测试
dd if=/dev/zero of=/home/alren/testfile bs=1M count=100
dd if=/dev/zero of=/home/alren/testfiel bs=1M count=160
代码演示：
[root@centos6 ~]# cat /etc/fstab## /etc/fstab# Created by anaconda on Thu Aug 11 03:07:57 2016## Accessible filesystems, by reference, are maintained under '/dev/disk'# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info#tmpfs /dev/shm tmpfs defaults 0 0devpts /dev/pts devpts gid=5,mode=620 0 0sysfs /sys sysfs defaults 0 0/dev/sdb1 swap swap pri=10 0 0/swapfile swap swap defaults,pri=100 0 0/dev/sdc1 /mnt/test ext4 defaults 0 0/dev/sdc1 /home ext4 usrquota,grpquota 0 0UUID="39208cf4-4d84-430b-ab53-7a26ad9d786d" /mnt/lv0 ext4 defaults 0 0UUID=240533cf-b37f-4460-974f-702bab867da5 / ext4 defaults1 1UUID=4e245c68-a392-4ce9-9a99-5d32d8d43872 /boot ext4 defaults1 2UUID=86aa7b74-24df-4043-ba83-f3b41a99ce0e /testdir ext4 defaults1 2[root@centos6 home]# mount -o remount,usrquota,grpquota /home[root@centos6 home]# quotacheck -cug /home[root@centos6 home]# lsalren aquota.group aquota.user chen cheng chenggg lost+found[root@centos6 home]# quotaon -p /homegroup quota on /home (/dev/sdc1) is offuser quota on /home (/dev/sdc1) is off[root@centos6 home]# quotaon /home[root@centos6 home]# quotaon -p /homegroup quota on /home (/dev/sdc1) is onuser quota on /home (/dev/sdc1) is on[root@centos6 home]# setquota alren 100000 150000 0 0 /home[root@centos6 ~]# repquota /home*** Report for user quotas on device /dev/sdc1Block grace time: 7days; Inode grace time: 7days Block limits File limitsUser used soft hard grace used soft hard grace----------------------------------------------------------------------root -- 37952 0 0 967 0 0chen -- 43644 0 0 3198 0 0chenggg -- 32 0 0 8 0 0cheng -- 32 0 0 8 0 0alren -- 32 100000 150000 9 0 0[root@centos6 ~]#[root@centos6 home]# edquota alren[root@centos6 home]# su - alren[alren@centos6 ~]$ quota alrenDisk quotas for user alren (uid 524): Filesystem blocks quota limit grace files quota limit grace /dev/sdc1 32 100000 150000 8 0 0[alren@centos6 ~]$ repquota /homerepquota: Cannot open quotafile /home/aquota.user: 权限不够repquota: Quota file not found or has wrong format.repquota: Not all specified mountpoints are using quota.[alren@centos6 ~]$ dd if=/dev/zero of=/home/alren bs=1M count=100dd: 正在打开"/home/alren": 是一个目录[alren@centos6 ~]$ dd if=/dev/zero of=/home/alren/testfile bs=1M count=100sdc1: warning, user block quota exceeded.记录了100+0 的读入记录了100+0 的写出104857600字节(105 MB)已复制，0.613277 秒，171 MB/秒[alren@centos6 ~]$ dd if=/dev/zero of=/home/alren/testfile bs=1M count=160sdc1: warning, user block quota exceeded.sdc1: write failed, user block limit reached.dd: 正在写入"/home/alren/testfile": 超出磁盘限额记录了147+0 的读入记录了146+0 的写出153567232字节(154 MB)已复制，0.876813 秒，175 MB/秒[alren@centos6 ~]$
三、独立冗余磁盘整列(RAID，本文所述为软RAID)
1、简介
RAID:Redundant Arrays of Inexpensive(Independent)Disks，1988年由加利福尼亚大学伯克利分校（University of California-Berkeley） "A Case for Redundant Arrays of Inexpensive Disks"提出。多个磁盘合成一个"阵列"来提供更好的性能、冗余，或者两者都提供，就叫做独立磁盘冗余整列。
2、特点
1）提高IO性能，提升磁盘读写
2）提高耐用性，磁盘冗余来实现
3）多块磁盘组织在一起的工作方式有所不同
3、raid级别
RAID-0：将数据切割成等分，然后按次序存储在磁盘中
RAID-1：将数据切割成等分，然后分别存入各个磁盘中
RAID-5：将数据切割成等分，然后按次序存储在磁盘中，并且每个磁盘轮流存储校验信息
......
RAID-6: 将数据切割成等分，然后按次序存储在磁盘中，并且每个磁盘轮流存储校验信息，且存两份校验信息
RAID-10: 先做raid1，然后做raid0即可
RAID-01: 先做raid0，然后做raid1即可
3、raid级别及其特性
RAID-0；读写性能提升
可用空间n*min(s1,s2...)
无容错能力
最少磁盘数量：2个
RAID-1：读性能提升，写性能有所下降
1*min(s1,s2,...)
有冗余能力
最少磁盘数量：2,2N
RAID-5: 读写性能提升
可用空间(N-1)*min(s1,s2)
有容错能力，只允许坏一块磁盘
最少磁盘数量：3,3+
RAID-6：读写性能提升
可用空间(N-2)*min(s1,s2,...)
有容错能力允许坏两块磁盘
最少磁盘数量：4,4+
RAID-10：读、写性能提升
可用空间：N*min(S1,S2,...)/2
有容错能力：每组镜像最多只能坏一块
最少磁盘数：4, 4+
RAID-01：读、写性能提升
可用空间：N*min(S1,S2,...)/2
有容错能力：每组镜像最多只能坏一块
最少磁盘数：4, 4+
常用级别：RAID-0, RAID-1, RAID-5, RAID-10, RAID-50
软RAID-5基本选项：
mdadm:为软raid提供管理界面，为空余磁盘添加冗余，RAID设备可为/dev/md0、/dev/md1、/dev/md2、 /dev/md3等等
mdadm命令：
语法格式：mdadm [mode]
模式：
创建：-C
装配：-A
管理：-f,-r,-a
-C:创建模式
-n #:使用#个快设备来创建次RAID
-l #:指明RAID及级别
-a {yes|no}:自动创建目标raid设备的设备文件
-c chunck_size:指明块设备的大小
-x #:指明空闲磁盘个数
-D: 显示raid的详细信息
mdadm -D /dev/md#
管理模式：
-f:标记指定磁盘为损坏
-a:添加磁盘
-r:移除磁盘
观察md的模式：
cat /proc/mdstat
停止md设备：
mdamd -S /dev/md#
软RAID-5实现步骤：
1、创建磁盘分区，本实验使用5块磁盘做实验，其中4块为真实使用，1块为冗余备份
fdisk /dev/sd{b,c,d,e,f}1 #磁盘分区10G并改其文件类型为fd
2、创建raid设备
mdadm -C /dev/md0 -a yes -l 5 -n 4 -x1 /dev/sd{b,c,d,e,f}1
mdamd -D /dev/md0
cat /proc/mdstat
3、格式化创建的md0设备
mkfs.ext4 /dev/md0
4、设置开机自动挂载
vim /etc/fstab
UUID="b92ddd51-c555-4948-b1d5-8563b697a2f1" /mnt/raid ext4 defaults 0 0
5、生成配置文件/etc/mdadm.conf
mdadm -Ds /dev/md0 > /etc/mdadm.conf
mdadm -S /dev/md0 停止raid
mdadm -A /dev/md0 启动raid
6、测试
mdadm /dev/md0 -f /dev/sdf1 #模拟损坏
mdadm /dev/md0 -r /dev/sdf1 #删除成员
mdadm /dev/md0 -a /dev/sdf1 #增加
mdadm -G /dev/md0 -n 6 -a /dev/sdd4 #增加成员
mkfs.ext4 /dev/md0 #重新格式化
7、删除raid
umount /mnt/raid
mdadm -S /dev/md0 停止raid
rm -f /etc/mdadm.conf
vi /etc/fstab
fdisk /dev/sda
mdadm --zero-superblock /dev/sdd1
演示：
[root@centos7 ~]# mdadm -C /dev/md0 -a yes -l 5 -n 4 -x1 /dev/sd{b,c,d,e,f}1mdadm: /dev/sdb1 appears to contain an ext2fs file system size=5242880K mtime=Thu Jan 1 08:00:00 1970Continue creating array? ymdadm: Defaulting to version 1.2 metadatamdadm: array /dev/md0 started.[root@centos7 ~]# mdadm -D /dev/md0/dev/md0: Version : 1.2 Creation Time : Tue Aug 30 11:28:31 2016 Raid Level : raid5 Array Size : 31432704 (29.98 GiB 32.19 GB) Used Dev Size : 10477568 (9.99 GiB 10.73 GB) Raid Devices : 4 Total Devices : 5 Persistence : Superblock is persistent Update Time : Tue Aug 30 11:28:42 2016 State : clean, degraded, recovering Active Devices : 3Working Devices : 5 Failed Devices : 0 Spare Devices : 2 Layout : left-symmetric Chunk Size : 512K Rebuild Status : 18% complete Name : centos7.localdomain:0 (local to host centos7.localdomain) UUID : 40fbcb9e:3de8f63f:0ec52e1d:98020537 Events : 3 Number Major Minor RaidDevice State 0 8 17 0 active sync /dev/sdb1 1 8 33 1 active sync /dev/sdc1 2 8 49 2 active sync /dev/sdd1 5 8 65 3 spare rebuilding /dev/sde1 4 8 81 - spare /dev/sdf1[root@centos7 ~]# mdadm -D /dev/md0/dev/md0: Version : 1.2 Creation Time : Tue Aug 30 11:28:31 2016 Raid Level : raid5 Array Size : 31432704 (29.98 GiB 32.19 GB) Used Dev Size : 10477568 (9.99 GiB 10.73 GB) Raid Devices : 4 Total Devices : 5 Persistence : Superblock is persistent Update Time : Tue Aug 30 11:29:42 2016 State : clean, degraded, recovering Active Devices : 3Working Devices : 5 Failed Devices : 0 Spare Devices : 2 Layout : left-symmetric Chunk Size : 512K Rebuild Status : 88% complete Name : centos7.localdomain:0 (local to host centos7.localdomain) UUID : 40fbcb9e:3de8f63f:0ec52e1d:98020537 Events : 15 Number Major Minor RaidDevice State 0 8 17 0 active sync /dev/sdb1 1 8 33 1 active sync /dev/sdc1 2 8 49 2 active sync /dev/sdd1 5 8 65 3 spare rebuilding /dev/sde1 4 8 81 - spare /dev/sdf1[root@centos7 ~]# mdadm -D /dev/md0/dev/md0: Version : 1.2 Creation Time : Tue Aug 30 11:28:31 2016 Raid Level : raid5 Array Size : 31432704 (29.98 GiB 32.19 GB) Used Dev Size : 10477568 (9.99 GiB 10.73 GB) Raid Devices : 4 Total Devices : 5 Persistence : Superblock is persistent Update Time : Tue Aug 30 11:29:52 2016 State : clean Active Devices : 4Working Devices : 5 Failed Devices : 0 Spare Devices : 1 Layout : left-symmetric Chunk Size : 512K Name : centos7.localdomain:0 (local to host centos7.localdomain) UUID : 40fbcb9e:3de8f63f:0ec52e1d:98020537 Events : 18 Number Major Minor RaidDevice State 0 8 17 0 active sync /dev/sdb1 1 8 33 1 active sync /dev/sdc1 2 8 49 2 active sync /dev/sdd1 5 8 65 3 active sync /dev/sde1 4 8 81 - spare /dev/sdf1[root@centos7 ~]# mkfs.ext4 /dev/md0mke2fs 1.42.9 (28-Dec-2013)Filesystem label=OS type: LinuxBlock size=4096 (log=2)Fragment size=4096 (log=2)Stride=128 blocks, Stripe width=384 blocks1966080 inodes, 7858176 blocks392908 blocks (5.00%) reserved for the super userFirst data block=0Maximum filesystem blocks=2155872256240 block groups32768 blocks per group, 32768 fragments per group8192 inodes per groupSuperblock backups stored on blocks:32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,4096000Allocating group tables: doneWriting inode tables: doneCreating journal (32768 blocks): doneWriting superblocks and filesystem accounting information: done[root@centos7 ~]# mdadm -Ds /dev/md0 >/etc/mdadm.conf[root@centos7 ~]# mdadm -S /dev/md0mdadm: stopped /dev/md0[root@centos7 ~]# mdadm -A /dev/md0mdadm: /dev/md0 has been started with 4 drives and 1 spare.[root@centos7 ~]# mdadm -D /dev/md0/dev/md0: Version : 1.2 Creation Time : Tue Aug 30 11:28:31 2016 Raid Level : raid5 Array Size : 31432704 (29.98 GiB 32.19 GB) Used Dev Size : 10477568 (9.99 GiB 10.73 GB) Raid Devices : 4 Total Devices : 5 Persistence : Superblock is persistent Update Time : Tue Aug 30 11:30:29 2016 State : clean Active Devices : 4Working Devices : 5 Failed Devices : 0 Spare Devices : 1 Layout : left-symmetric Chunk Size : 512K Name : centos7.localdomain:0 (local to host centos7.localdomain) UUID : 40fbcb9e:3de8f63f:0ec52e1d:98020537 Events : 18 Number Major Minor RaidDevice State 0 8 17 0 active sync /dev/sdb1 1 8 33 1 active sync /dev/sdc1 2 8 49 2 active sync /dev/sdd1 5 8 65 3 active sync /dev/sde1 4 8 81 - spare /dev/sdf1[root@centos7 ~]# mdadm /dev/md0 -f /dev/sdb1mdadm: set /dev/sdb1 faulty in /dev/md0[root@centos7 ~]# mdadm -D /dev/md0/dev/md0: Version : 1.2 Creation Time : Tue Aug 30 11:28:31 2016 Raid Level : raid5 Array Size : 31432704 (29.98 GiB 32.19 GB) Used Dev Size : 10477568 (9.99 GiB 10.73 GB) Raid Devices : 4 Total Devices : 5 Persistence : Superblock is persistent Update Time : Tue Aug 30 11:32:19 2016 State : clean, degraded, recovering Active Devices : 3Working Devices : 4 Failed Devices : 1 Spare Devices : 1 Layout : left-symmetric Chunk Size : 512K Rebuild Status : 5% complete Name : centos7.localdomain:0 (local to host centos7.localdomain) UUID : 40fbcb9e:3de8f63f:0ec52e1d:98020537 Events : 20 Number Major Minor RaidDevice State 4 8 81 0 spare rebuilding /dev/sdf1 1 8 33 1 active sync /dev/sdc1 2 8 49 2 active sync /dev/sdd1 5 8 65 3 active sync /dev/sde1 0 8 17 - faulty /dev/sdb1[root@centos7 ~]# cat /proc/mdstatPersonalities : [raid6] [raid5] [raid4]md0 : active raid5 sdb1[0](F) sdf1[4] sde1[5] sdd1[2] sdc1[1] 31432704 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/3] [_UUU] [========>............] recovery = 43.8% (4592156/10477568) finish=0.7min speed=129724K/secunused devices: [root@centos7 ~]# mdadm -D /dev/md0/dev/md0: Version : 1.2 Creation Time : Tue Aug 30 11:28:31 2016 Raid Level : raid5 Array Size : 31432704 (29.98 GiB 32.19 GB) Used Dev Size : 10477568 (9.99 GiB 10.73 GB) Raid Devices : 4 Total Devices : 5 Persistence : Superblock is persistent Update Time : Tue Aug 30 11:33:40 2016 State : clean Active Devices : 4Working Devices : 4 Failed Devices : 1 Spare Devices : 0 Layout : left-symmetric Chunk Size : 512K Name : centos7.localdomain:0 (local to host centos7.localdomain) UUID : 40fbcb9e:3de8f63f:0ec52e1d:98020537 Events : 37 Number Major Minor RaidDevice State 4 8 81 0 active sync /dev/sdf1 1 8 33 1 active sync /dev/sdc1 2 8 49 2 active sync /dev/sdd1 5 8 65 3 active sync /dev/sde1 0 8 17 - faulty /dev/sdb1[root@centos7 ~]# mdadm -G /dev/md0 -n 6 -a /dev/sdb2mdadm: Need 2 spares to avoid degraded array, and only have 1. Use --force to over-ride this check.[root@centos7 ~]# mdadm -G /dev/md0 -n 6 -a /dev/sdb2 --forcemdadm: added /dev/sdb2mdadm: Failed to initiate reshape!unfreeze[root@centos7 ~]# mkfs.ext4 /dev/md0mke2fs 1.42.9 (28-Dec-2013)Filesystem label=OS type: LinuxBlock size=4096 (log=2)Fragment size=4096 (log=2)Stride=128 blocks, Stripe width=384 blocks1966080 inodes, 7858176 blocks392908 blocks (5.00%) reserved for the super userFirst data block=0Maximum filesystem blocks=2155872256240 block groups32768 blocks per group, 32768 fragments per group8192 inodes per groupSuperblock backups stored on blocks:32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,4096000Allocating group tables: doneWriting inode tables: doneCreating journal (32768 blocks): doneWriting superblocks and filesystem accounting information: done[root@centos7 ~]# mdadm -D /dev/md0/dev/md0: Version : 1.2 Creation Time : Tue Aug 30 11:28:31 2016 Raid Level : raid5 Array Size : 31432704 (29.98 GiB 32.19 GB) Used Dev Size : 10477568 (9.99 GiB 10.73 GB) Raid Devices : 4 Total Devices : 6 Persistence : Superblock is persistent Update Time : Tue Aug 30 11:34:55 2016 State : clean Active Devices : 4Working Devices : 5 Failed Devices : 1 Spare Devices : 1 Layout : left-symmetric Chunk Size : 512K Name : centos7.localdomain:0 (local to host centos7.localdomain) UUID : 40fbcb9e:3de8f63f:0ec52e1d:98020537 Events : 41 Number Major Minor RaidDevice State 4 8 81 0 active sync /dev/sdf1 1 8 33 1 active sync /dev/sdc1 2 8 49 2 active sync /dev/sdd1 5 8 65 3 active sync /dev/sde1 0 8 17 - faulty /dev/sdb1 6 8 18 - spare /dev/sdb2[root@centos7 ~]# mdadm /dev/md0 -r /dev/sdb1mdadm: hot removed /dev/sdb1 from /dev/md0[root@centos7 ~]# mdadm /dev/md0 -a /dev/sdb1mdadm: added /dev/sdb1[root@centos7 ~]# mdadm -D /dev/md0/dev/md0: Version : 1.2 Creation Time : Tue Aug 30 11:28:31 2016 Raid Level : raid5 Array Size : 31432704 (29.98 GiB 32.19 GB) Used Dev Size : 10477568 (9.99 GiB 10.73 GB) Raid Devices : 4 Total Devices : 6 Persistence : Superblock is persistent Update Time : Tue Aug 30 11:35:46 2016 State : clean Active Devices : 4Working Devices : 6 Failed Devices : 0 Spare Devices : 2 Layout : left-symmetric Chunk Size : 512K Name : centos7.localdomain:0 (local to host centos7.localdomain) UUID : 40fbcb9e:3de8f63f:0ec52e1d:98020537 Events : 43 Number Major Minor RaidDevice State 4 8 81 0 active sync /dev/sdf1 1 8 33 1 active sync /dev/sdc1 2 8 49 2 active sync /dev/sdd1 5 8 65 3 active sync /dev/sde1 6 8 18 - spare /dev/sdb2 7 8 17 - spare /dev/sdb1[root@centos7 ~]# 三、LVM(逻辑卷管理)
1、简介
LVM: Logical Volume Manager，允许对卷进行方便操作的抽象层，包括重新设定文件系统的大小，允许在多个物理设备间重新组织文件系统。将设备指定为物理卷，用一个或多个物理卷来创建一个卷组，物理卷是用固定大小的物理区域(PE)来定义，在物理卷上创建逻辑卷，然后在逻辑卷上创建文件系统。
2、pv管理工具
1）显示pv信息
pvs:简要pv信息
pvdisplay:详细pv信息
2）创建pv
pvcreate /dev/DEVICE
3、vg管理工具
1）显示卷组
vgs:简要vg信息
vgdisplay:详细vg信息
2)创建逻辑卷
vgcreate [-s #[kKmMgGtTpPeE]] VolumeGroupName PhysicalDevicePath [PhysicalDevicePath...]
3)管理卷组
vgextend VolumeGroupName PhysicalDevicePath [PhysicalDevicePath...] vgreduce VolumeGroupName PhysicalDevicePath [PhysicalDevicePath...]
4)删除卷组
先做vgremove，再做pvremove
4、lv工具
1)显示逻辑卷
lvs:显示逻辑卷简单信息
lvdisplay:显示详细逻辑卷信息
2）删除逻辑卷
lvremove /dev/VG_NAME/LV_NAME
3)重设文件系统大小
fsadm [options] resize device [new_size[BKMGTEP]] resize2fs [-f] [-F] [-M] [-P] [-p] device [new_size]
5)扩展逻辑卷
lvextend -L [+]#[mMgGtT] /dev/VG_NAME/LV_NAME
resize2fs /dev/VG_NAME/LV_NAME
6）缩减逻辑卷
umount /dev/VG_NAME/LV_NAME
e2fsck -f /dev/VG_NAME/LV_NAME
resize2fs /dev/VG_NAME/LV_NAME
[mMgGtT]
lvreduce -L [-]#[mMgGtT] /dev/VG_NAME/LV_NAME
演示：
[root@centos6 ~]# lsblkNAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTsr0 11:0 1 3.7G 0 romsda 8:0 0 120G 0 disk├─sda1 8:1 0 200M 0 part /boot├─sda2 8:2 0 80G 0 part /├─sda3 8:3 0 20G 0 part /testdir├─sda4 8:4 0 1K 0 part├─sda5 8:5 0 4G 0 part [SWAP]└─sda6 8:6 0 2G 0 partsdb 8:16 0 120G 0 disk└─sdb1 8:17 0 2G 0 part [SWAP]sdc 8:32 0 20G 0 disk├─sdc2 8:34 0 10G 0 part└─sdc1 8:33 0 2G 0 part /mnt/testsdd 8:48 0 20G 0 disksde 8:64 0 20G 0 disksdf 8:80 0 20G 0 disk[root@centos6 ~]#[root@centos6 ~]# pvcreate /dev/sd{c2,d} Physical volume "/dev/sdc2" successfully created Physical volume "/dev/sdd" successfully created[root@centos6 ~]# pvs PV VG Fmt Attr PSize PFree /dev/sdc2 lvm2 ---- 10.00g 10.00g /dev/sdd lvm2 ---- 20.00g 20.00g[root@centos6 ~]# pvdisplay "/dev/sdc2" is a new physical volume of "10.00 GiB" --- NEW Physical volume --- PV Name /dev/sdc2 VG Name PV Size 10.00 GiB Allocatable NO PE Size 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID PZRtfc-8dci-dW2V-ayy6-RVHQ-6oMh-q8LhwC "/dev/sdd" is a new physical volume of "20.00 GiB" --- NEW Physical volume --- PV Name /dev/sdd VG Name PV Size 20.00 GiB Allocatable NO PE Size 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID X7gN2P-RysJ-Woci-IiIu-IphR-elkT-sAtSID################创建逻辑卷组##################[root@centos6 ~]# vgcreate vg0 /dev/sd{c2,d} Volume group "vg0" successfully created[root@centos6 ~]# vgs VG #PV #LV #SN Attr VSize VFree vg0 2 0 0 wz--n- 30.00g 30.00g[root@centos6 ~]# vgdisplay --- Volume group --- VG Name vg0 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 30.00 GiB PE Size 4.00 MiB Total PE 7679 Alloc PE / Size 0 / 0 Free PE / Size 7679 / 30.00 GiB VG UUID gbfTZO-aqo8-kdfg-cLkM-xXug-VWRK-hl1qSA################创建逻辑卷###################[root@centos6 ~]# lvcreate -n lv0 -L 15G vg0 Logical volume "lv0" created.[root@centos6 ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert lv0 vg0 -wi-a----- 15.00g[root@centos6 ~]# lvdisplay --- Logical volume --- LV Path /dev/vg0/lv0 LV Name lv0 VG Name vg0 LV UUID XJ1Nco-ZP4s-h93D-YkIy-DcbN-6TEq-4XXJDI LV Write Access read/write LV Creation host, time centos6.localdomain, 2016-08-24 21:26:41 +0800 LV Status available # open 0 LV Size 15.00 GiB Current LE 3840 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:0[root@centos6 ~]# mkfs.ext4 /dev/vgvg0/ vga_arbiter[root@centos6 ~]# mkfs.ext4 /dev/vg0/lv0mke2fs 1.41.12 (17-May-2010)文件系统标签=操作系统:Linux块大小=4096 (log=2)分块大小=4096 (log=2)Stride=0 blocks, Stripe width=0 blocks983040 inodes, 3932160 blocks196608 blocks (5.00%) reserved for the super user第一个数据块=0Maximum filesystem blocks=4026531840120 block groups32768 blocks per group, 32768 fragments per group8192 inodes per groupSuperblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208正在写入inode表: 完成Creating journal (32768 blocks): 完成Writing superblocks and filesystem accounting information: 完成This filesystem will be automatically checked every 36 mounts or180 days, whichever comes first. Use tune2fs -c or -i to override.[root@centos6 ~]# vi /etc/fstab[root@centos6 ~]# blkid /dev/vgvg0/ vga_arbiter[root@centos6 ~]# blkid/dev/sda2: UUID="240533cf-b37f-4460-974f-702bab867da5" TYPE="ext4"/dev/sda1: UUID="4e245c68-a392-4ce9-9a99-5d32d8d43872" TYPE="ext4"/dev/sda3: UUID="86aa7b74-24df-4043-ba83-f3b41a99ce0e" TYPE="ext4"/dev/sda5: UUID="f8ef48ef-b141-48e5-9735-ff9089bd54ba" TYPE="swap"/dev/sda6: UUID="ca0c47c7-edb0-4685-8b29-44c6a5bf7a11" TYPE="ext4" LABEL="MYHOME"/dev/sdb1: UUID="443bb126-8dc0-45a3-acfe-9a37629bb511" TYPE="swap"/dev/sdc2: UUID="PZRtfc-8dci-dW2V-ayy6-RVHQ-6oMh-q8LhwC" TYPE="LVM2_member"/dev/sdd: UUID="X7gN2P-RysJ-Woci-IiIu-IphR-elkT-sAtSID" TYPE="LVM2_member"/dev/mapper/vg0-lv0: UUID="bac8210f-143d-4f89-a3fe-b75be6060274" TYPE="ext4"/dev/sdc1: UUID="7f140c30-7c34-4387-abac-b4687870463c" TYPE="ext4"[root@centos6 ~]# vi /etc/fstab[root@centos6 ~]# mount -a[root@centos6 ~]# dfFilesystem 1K-blocks Used Available Use% Mounted on/dev/sda2 82438832 5772100 72472428 8% /tmpfs 502068 0 502068 0% /dev/shm/dev/sda1 194241 39067 144934 22% /boot/dev/sda3 20511356 45044 19417736 1% /testdir/dev/sdc1 2005848 84784 1815840 5% /mnt/test/dev/sdc1 2005848 84784 1815840 5% /home/dev/mapper/vg0-lv0 15350768 38384 14525952 1% /mnt/lv0[root@centos6 ~]# cd /mnt/lv0/[root@centos6 lv0]# lslost+found[root@centos6 lv0]# df -hFilesystem Size Used Avail Use% Mounted on/dev/sda2 79G 5.6G 70G 8% /tmpfs 491M 0 491M 0% /dev/shm/dev/sda1 190M 39M 142M 22% /boot/dev/sda3 20G 44M 19G 1% /testdir/dev/sdc1 2.0G 83M 1.8G 5% /mnt/test/dev/sdc1 2.0G 83M 1.8G 5% /home/dev/mapper/vg0-lv0 15G 38M 14G 1% /mnt/lv0################扩展逻辑卷#################[root@centos6 lv0]# lvextend -L +6G /dev/vg0/lv0 Size of logical volume vg0/lv0 changed from 15.00 GiB (3840 extents) to 21.00 GiB (5376extents). Logical volume lv0 successfully resized.[root@centos6 lv0]# df -hFilesystem Size Used Avail Use% Mounted on/dev/sda2 79G 5.6G 70G 8% /tmpfs 491M 0 491M 0% /dev/shm/dev/sda1 190M 39M 142M 22% /boot/dev/sda3 20G 44M 19G 1% /testdir/dev/sdc1 2.0G 83M 1.8G 5% /mnt/test/dev/sdc1 2.0G 83M 1.8G 5% /home/dev/mapper/vg0-lv0 15G 38M 14G 1% /mnt/lv0[root@centos6 lv0]# resize2fs /dev/vg0/lv0resize2fs 1.41.12 (17-May-2010)Filesystem at /dev/vg0/lv0 is mounted on /mnt/lv0; on-line resizing requiredold desc_blocks = 1, new_desc_blocks = 2Performing an on-line resize of /dev/vg0/lv0 to 5505024 (4k) blocks.The filesystem on /dev/vg0/lv0 is now 5505024 blocks long.[root@centos6 lv0]# df -hFilesystem Size Used Avail Use% Mounted on/dev/sda2 79G 5.6G 70G 8% /tmpfs 491M 0 491M 0% /dev/shm/dev/sda1 190M 39M 142M 22% /boot/dev/sda3 20G 44M 19G 1% /testdir/dev/sdc1 2.0G 83M 1.8G 5% /mnt/test/dev/sdc1 2.0G 83M 1.8G 5% /home/dev/mapper/vg0-lv0 21G 42M 20G 1% /mnt/lv0##############新增逻辑卷组及加入逻辑卷################[root@centos6 ~]# pvcreate /dev/sde1 Physical volume "/dev/sde1" successfully created[root@centos6 ~]# vgextend /dev/vg0/ /dev/sdesde sde1[root@centos6 ~]# vgextend /dev/vg0/ /dev/sde1 Volume group name "vg0/" has invalid characters. Cannot process volume group vg0/[root@centos6 ~]# vgextend vg0 /dev/sde1 Volume group "vg0" successfully extended[root@centos6 ~]# vgs VG #PV #LV #SN Attr VSize VFree vg0 3 1 0 wz--n- 43.00g 22.00g[root@centos6 ~]# lvs \> LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert lv0 vg0 -wi-ao---- 21.00g[root@centos6 ~]# pvs PV VG Fmt Attr PSize PFree /dev/sdc2 vg0 lvm2 a--u 10.00g 9.00g /dev/sdd vg0 lvm2 a--u 20.00g 0 /dev/sde1 vg0 lvm2 a--u 13.00g 13.00g[root@centos6 ~]# lvcreate -L +13G /dev/vg0/lv0 Volume group name expected (no slash) Run `lvcreate --help' for more information.[root@centos6 ~]# lvextend -L +13G /dev/vg0/lv0 Size of logical volume vg0/lv0 changed from 21.00 GiB (5376 extents) to 34.00 GiB (8704extents). Logical volume lv0 successfully resized.[root@centos6 ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert lv0 vg0 -wi-ao---- 34.00g[root@centos6 ~]# resize2fs /dev/vg0/lv0resize2fs 1.41.12 (17-May-2010)Filesystem at /dev/vg0/lv0 is mounted on /mnt/lv0; on-line resizing requiredold desc_blocks = 2, new_desc_blocks = 3Performing an on-line resize of /dev/vg0/lv0 to 8912896 (4k) blocks.The filesystem on /dev/vg0/lv0 is now 8912896 blocks long.[root@centos6 ~]# df -h |grep "vg0-lv0"/dev/mapper/vg0-lv0 34G 45M 32G 1% /mnt/lv0################删除lv/vg/pv##################[root@centos6 ~]# lsblkNAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTsr0 11:0 1 3.7G 0 romsda 8:0 0 120G 0 disk├─sda1 8:1 0 200M 0 part /boot├─sda2 8:2 0 80G 0 part /├─sda3 8:3 0 20G 0 part /testdir├─sda4 8:4 0 1K 0 part├─sda5 8:5 0 4G 0 part [SWAP]└─sda6 8:6 0 2G 0 partsdb 8:16 0 120G 0 disk└─sdb1 8:17 0 2G 0 part [SWAP]sdc 8:32 0 20G 0 disk├─sdc2 8:34 0 10G 0 part│ └─vg0-lv0 (dm-0) 253:0 0 34G 0 lvm /mnt/lv0└─sdc1 8:33 0 2G 0 part /mnt/testsdd 8:48 0 20G 0 disk└─vg0-lv0 (dm-0) 253:0 0 34G 0 lvm /mnt/lv0sde 8:64 0 20G 0 disk└─sde1 8:65 0 13G 0 part └─vg0-lv0 (dm-0) 253:0 0 34G 0 lvm /mnt/lv0sdf 8:80 0 20G 0 disk[root@centos6 ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert lv0 vg0 -wi-ao---- 34.00g[root@centos6 ~]# lvremove /dev/vg0/lv0 Logical volume vg0/lv0 contains a filesystem in use.[root@centos6 ~]# umount /mnt/lv0/[root@centos6 ~]# lvremove /dev/vg0/lv0Do you really want to remove active logical volume lv0? [y/n]: y Logical volume "lv0" successfully removed[root@centos6 ~]# pvs PV VG Fmt Attr PSize PFree /dev/sdc2 vg0 lvm2 a--u 10.00g 10.00g /dev/sdd vg0 lvm2 a--u 20.00g 20.00g /dev/sde1 vg0 lvm2 a--u 13.00g 13.00g[root@centos6 ~]# pvremove /dev/sdc2 --force WARNING: PV /dev/sdc2 belongs to Volume Group vg0 (consider using vgreduce). /dev/sdc2: physical volume label not removed. (If you are certain you need pvremove, then confirm by using --force twice.)[root@centos6 ~]# pvs PV VG Fmt Attr PSize PFree /dev/sdc2 vg0 lvm2 a--u 10.00g 10.00g /dev/sdd vg0 lvm2 a--u 20.00g 20.00g /dev/sde1 vg0 lvm2 a--u 13.00g 13.00g[root@centos6 ~]# pvremove /dev/sdc2 --force WARNING: PV /dev/sdc2 belongs to Volume Group vg0 (consider using vgreduce). /dev/sdc2: physical volume label not removed. (If you are certain you need pvremove, then confirm by using --force twice.)[root@centos6 ~]# lvs[root@centos6 ~]# pvs PV VG Fmt Attr PSize PFree /dev/sdc2 vg0 lvm2 a--u 10.00g 10.00g /dev/sdd vg0 lvm2 a--u 20.00g 20.00g /dev/sde1 vg0 lvm2 a--u 13.00g 13.00g[root@centos6 ~]# vgremove vg0 Volume group "vg0" successfully removed[root@centos6 ~]# vgs[root@centos6 ~]# pvs PV VG Fmt Attr PSize PFree /dev/sdc2 lvm2 ---- 10.00g 10.00g /dev/sdd lvm2 ---- 20.00g 20.00g /dev/sde1 lvm2 ---- 13.01g 13.01g[root@centos6 ~]# pvremove /dev/sdc2 Labels on physical volume "/dev/sdc2" successfully wiped[root@centos6 ~]# pvs PV VG Fmt Attr PSize PFree /dev/sdd lvm2 ---- 20.00g 20.00g /dev/sde1 lvm2 ---- 13.01g 13.01g[root@centos6 ~]# pvremove /dev/sdd Labels on physical volume "/dev/sdd" successfully wiped[root@centos6 ~]# pvremove /dev/sde1 Labels on physical volume "/dev/sde1" successfully wiped[root@centos6 ~]# lsblkNAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTsr0 11:0 1 3.7G 0 romsda 8:0 0 120G 0 disk├─sda1 8:1 0 200M 0 part /boot├─sda2 8:2 0 80G 0 part /├─sda3 8:3 0 20G 0 part /testdir├─sda4 8:4 0 1K 0 part├─sda5 8:5 0 4G 0 part [SWAP]└─sda6 8:6 0 2G 0 partsdb 8:16 0 120G 0 disk└─sdb1 8:17 0 2G 0 part [SWAP]sdc 8:32 0 20G 0 disk├─sdc2 8:34 0 10G 0 part└─sdc1 8:33 0 2G 0 part /mnt/testsdd 8:48 0 20G 0 disksde 8:64 0 20G 0 disk└─sde1 8:65 0 13G 0 partsdf 8:80 0 20G 0 disk[root@centos6 ~]#################演示成功#################本文为小耳朵原创作品，如有瑕疵可留言管理员哦:)
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