RHCE:LVM创建，扩容，缩小，删除考试内容：创建和扩展LVM (xfs,ext4)
创建流程：
1>物理卷：PV
最小单位：PE，是PV上最小的块
#pvcreate #将实体partition建立成PV
#pvscan
#pvdisplay
#pvremote
#pvmove #缩小
2>卷组:VG
#vgcreate -s 16m|g|t #指定PE块的大小
#vgscan
#vgdisplay
#vgs
3>逻辑卷：LV
#lvcreate -L
#lvcreate -l
4>格式化文件系统
创建PV：
新创建一个分区，修改分区类型为LVM类型：
[root@foundation0 ~]# fdisk /dev/sdb
修改分区类型为LVM类型：
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'
Command (m for help): p
Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000a61c0
Device Boot Start End Blocks Id System
/dev/sdb1 2048 616447 307200 8e Linux LVM
/dev/sdb2 616448 1435647 409600 8e Linux LVM
/dev/sdb3 1435648 2459647 512000 8e Linux LVM
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
加载到系统内核：
[root@foundation0 ~]# partprobe
[root@foundation0 ~]# ll /dev/sdb
sdb sdb1 sdb2 sdb3 sdb4 sdb5
批量创建PV,将分区打到PV的标签:
[root@foundation0 ~]# pvcreate /dev/sdb{1,2,3,5}
WARNING: xfs signature detected on /dev/sdb1 at offset 0. Wipe it? [y/n] y
Wiping xfs signature on /dev/sdb1.
Physical volume "/dev/sdb1" successfully created
Physical volume "/dev/sdb2" successfully created
Physical volume "/dev/sdb3" successfully created
Physical volume "/dev/sdb5" successfully created
查看创建的PV：
[root@foundation0 ~]# pvscan
PV /dev/sdb1 lvm2 [300.00 MiB]
PV /dev/sdb3 lvm2 [500.00 MiB]
PV /dev/sdb2 lvm2 [400.00 MiB]
PV /dev/sdb5 lvm2 [500.00 MiB]
Total: 4 [1.66 GiB] / in use: 0 [0 ] / in no VG: 4 [1.66 GiB]
现在的PV不属于任何VG:,VG栏目为空
[root@foundation0 ~]# pvs
PV VG Fmt Attr PSize PFree
/dev/sdb1 lvm2 a-- 300.00m 300.00m
/dev/sdb2 lvm2 a-- 400.00m 400.00m
/dev/sdb3 lvm2 a-- 500.00m 500.00m
/dev/sdb5 lvm2 a-- 500.00m 500.00m
显示所有PV的详细信息：
[root@foundation0 ~]# pvdisplay
"/dev/sdb1" is a new physical volume of "300.00 MiB"
--- NEW Physical volume ---
PV Name /dev/sdb1
VG Name
PV Size 300.00 MiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID 7b1Dml-krjm-XRrI-z0sT-hKHz-t17t-BtoIXY
"/dev/sdb3" is a new physical volume of "500.00 MiB"
--- NEW Physical volume ---
PV Name /dev/sdb3
VG Name
PV Size 500.00 MiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID yAQ0Ri-sqRD-reSf-sd0M-BjLL-vDfF-cOrk5a
"/dev/sdb2" is a new physical volume of "400.00 MiB"
--- NEW Physical volume ---
PV Name /dev/sdb2
VG Name
PV Size 400.00 MiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID UmShT1-VVkL-Yi31-ik61-Au4p-ggN7-de8ZKy
"/dev/sdb5" is a new physical volume of "500.00 MiB"
--- NEW Physical volume ---
PV Name /dev/sdb5
VG Name
PV Size 500.00 MiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID 5HtMt9-ahgr-AOAG-ud2H-rM6k-I66x-6MV5VE
创建VG，创建VG后才会生成PE块
[root@foundation0 ~]# vgcreate vgsdb /dev/sdb{1,2,3,5}
Volume group "vgsdb" successfully created
[root@foundation0 ~]# pvdisplay /dev/sdb1 #现在生成了PE
--- Physical volume ---
PV Name /dev/sdb1
VG Name vgsdb #pv 现在属于vgsdb组
PV Size 300.00 MiB / not usable 4.00 MiB
Allocatable yes
PE Size 4.00 MiB #创建VG后生成了PE块的大小,这个可以通过参数指定块的大小
Total PE 74
Free PE 74
Allocated PE 0
PV UUID 7b1Dml-krjm-XRrI-z0sT-hKHz-t17t-BtoIXY
查看系统上的VG组以及组名
[root@foundation0 ~]# vgscan
Reading all physical volumes. This may take a while...
Found volume group "vgsdb" using metadata type lvm2
查看VG详细的信息:
[root@foundation0 ~]# vgdisplay
--- Volume group ---
VG Name vgsdb
System ID
Format lvm2
Metadata Areas 4
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 4
Act PV 4
VG Size 1.64 GiB
PE Size 4.00 MiB
Total PE 421
Alloc PE / Size 0 / 0
Free PE / Size 421 / 1.64 GiB
VG UUID x3RmVx-7hL4-WJJz-kV9u-BCUR-F3pW-UCAO0H
查看VG与PV的对应关系：
[root@foundation0 ~]# vgs
VG #PV #LV #SN Attr VSize VFree
vgsdb 4 0 0 wz--n- 1.64g 1.64g
查看PV与VG的对应关系:
[root@foundation0 ~]# pvs
PV VG Fmt Attr PSize PFree
/dev/sdb1 vgsdb lvm2 a-- 296.00m 296.00m
/dev/sdb2 vgsdb lvm2 a-- 396.00m 396.00m
/dev/sdb3 vgsdb lvm2 a-- 496.00m 496.00m
/dev/sdb5 vgsdb lvm2 a-- 496.00m 496.00m
创建LV
[root@foundation0 ~]# lvcreate -L 350M -n LVM01 vgsdb
Rounding up size to full physical extent 352.00 MiB
Logical volume "LVM01" created
[root@foundation0 ~]# lvs
LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert
LVM01 vgsdb -wi-a----- 352.00m
在lv上创建文件系统：
[root@foundation0 ~]# mkfs.xfs /dev/mapper/vgsdb-LVM01
meta-data=/dev/mapper/vgsdb-LVM01 isize=256 agcount=4, agsize=22528 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0
data = bsize=4096 blocks=90112, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
log =internal log bsize=4096 blocks=853, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
[root@foundation0 ~]# mkdir /mnt/lvm
[root@foundation0 ~]# mount /dev/mapper/vgsdb-LVM01 /mnt/lvm
[root@foundation0 ~]# cd /mnt/lvm/
[root@foundation0 lvm]# ls
扩展LVM
查看VG的空间：
[root@foundation0 mapper]# vgs
VG #PV #LV #SN Attr VSize VFree
vgsdb 4 1 0 wz--n- 1.64g 1.30g
[root@foundation0 mapper]# vgdisplay
--- Volume group ---
VG Name vgsdb
System ID
Format lvm2
Metadata Areas 4
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 4
Act PV 4
VG Size 1.64 GiB
PE Size 4.00 MiB
Total PE 421
Alloc PE / Size 88 / 352.00 MiB
Free PE / Size 333 / 1.30 GiB
VG UUID x3RmVx-7hL4-WJJz-kV9u-BCUR-F3pW-UCAO0H
创建新分区：
Command (m for help): n
All primary partitions are in use
Adding logical partition 6
First sector (3487744-41943039, default 3487744):
Using default value 3487744
Last sector, +sectors or +size{K,M,G} (3487744-41943039, default 41943039): +500M
Partition 6 of type Linux and of size 500 MiB is set
Command (m for help): t
Partition number (1-6, default 6):
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'
Command (m for help): p
Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000a61c0
Device Boot Start End Blocks Id System
/dev/sdb1 2048 616447 307200 8e Linux LVM
/dev/sdb2 616448 1435647 409600 8e Linux LVM
/dev/sdb3 1435648 2459647 512000 8e Linux LVM
/dev/sdb4 2459648 41943039 19741696 5 Extended
/dev/sdb5 2461696 3485695 512000 8e Linux LVM
/dev/sdb6 3487744 4511743 512000 8e Linux LVM
创建PV
[root@foundation0 mapper]# pvcreate /dev/sdb6
Physical volume "/dev/sdb6" successfully created
扩展VG:
[root@foundation0 mapper]# vgextend vgsdb /dev/sdb6
Volume group "vgsdb" successfully extended
[root@foundation0 mapper]# vgdisplay
--- Volume group ---
VG Name vgsdb
System ID
Format lvm2
Metadata Areas 5
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 5
Act PV 5
VG Size 2.13 GiB
PE Size 4.00 MiB
Total PE 545
Alloc PE / Size 88 / 352.00 MiB
Free PE / Size 457 / 1.79 GiB
VG UUID x3RmVx-7hL4-WJJz-kV9u-BCUR-F3pW-UCAO0H
扩展LV
[root@foundation0 mapper]# lvs
LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert
LVM01 vgsdb -wi-ao---- 352.00m
调整lv的大小，可以扩大，也可以缩小，但缩小的值不能超过数据占用的最大值
[root@foundation0 mapper]# lvextend -L 800M /dev/vgsdb/LVM01
Extending logical volume LVM01 to 800.00 MiB
Logical volume LVM01 successfully resized
扩展文件系统：
[root@foundation0 mapper]# df -Th
Filesystem Type Size Used Avail Use% Mounted on
/dev/sda1 xfs 118G 14G 104G 12% /
devtmpfs devtmpfs 909M 0 909M 0% /dev
tmpfs tmpfs 918M 8.0K 918M 1% /dev/shm
tmpfs tmpfs 918M 8.6M 909M 1% /run
tmpfs tmpfs 918M 0 918M 0% /sys/fs/cgroup
/dev/loop0 iso9660 3.5G 3.5G 0 100% /content/rhel7.0/x86_64/dvd
/dev/loop1 xfs 509M 26M 483M 6% /run/media/root/0ea2b5d5-4f68-4abe-ae81-ea9a0175a730
/dev/mapper/vgsdb-LVM01 xfs 349M 18M 331M 6% /mnt/lvm
xfs文件系统扩展：
xfs文件系统的调整命令是xfs_growfs（只支持增大）
lvextend -L 120G /dev/mapper/centos-home //增大至120G
lvextend -L +20G /dev/mapper/centos-home //增加20G
xfs_growfs /dev/mapper/centos-home //执行调整
[root@foundation0 mapper]# xfs_growfs /mnt/lvm/
meta-data=/dev/mapper/vgsdb-LVM01 isize=256 agcount=4, agsize=22528 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0
data = bsize=4096 blocks=90112, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
log =internal bsize=4096 blocks=853, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 90112 to 204800
[root@foundation0 mapper]# df -Th
Filesystem Type Size Used Avail Use% Mounted on
/dev/sda1 xfs 118G 14G 104G 12% /
devtmpfs devtmpfs 909M 0 909M 0% /dev
tmpfs tmpfs 918M 8.0K 918M 1% /dev/shm
tmpfs tmpfs 918M 8.6M 909M 1% /run
tmpfs tmpfs 918M 0 918M 0% /sys/fs/cgroup
/dev/loop0 iso9660 3.5G 3.5G 0 100% /content/rhel7.0/x86_64/dvd
/dev/loop1 xfs 509M 26M 483M 6% /run/media/root/0ea2b5d5-4f68-4abe-ae81-ea9a0175a730
/dev/mapper/vgsdb-LVM01 xfs 797M 18M 779M 3% /mnt/lvm
ext4文件系统扩展：
ext2/ext3/ext4文件系统的调整命令是resize2fs（增大和减小都支持）
lvextend -L 120G /dev/mapper/centos-home //增大至120G
lvextend -L +20G /dev/mapper/centos-home //增加20G
lvreduce -L 50G /dev/mapper/centos-home //减小至50G
lvreduce -L -8G /dev/mapper/centos-home //减小8G
resize2fs /dev/mapper/centos-home //执行调整
创建PV:
创建PV分区
Command (m for help): t
Partition number (1-7, default 7):
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'
Command (m for help): n
All primary partitions are in use
Adding logical partition 8
First sector (5539840-41943039, default 5539840):
Using default value 5539840
Last sector, +sectors or +size{K,M,G} (5539840-41943039, default 41943039): +1G
Partition 8 of type Linux and of size 1 GiB is set
Command (m for help): t
Partition number (1-8, default 8): 8e
Partition number (1-8, default 8):
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'
Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000a61c0
Device Boot Start End Blocks Id System
/dev/sdb1 2048 616447 307200 8e Linux LVM
/dev/sdb2 616448 1435647 409600 8e Linux LVM
/dev/sdb3 1435648 2459647 512000 8e Linux LVM
/dev/sdb4 2459648 41943039 19741696 5 Extended
/dev/sdb5 2461696 3485695 512000 8e Linux LVM
/dev/sdb6 3487744 4511743 512000 8e Linux LVM
/dev/sdb7 4513792 5537791 512000 8e Linux LVM
/dev/sdb8 5539840 7636991 1048576 8e Linux LVM
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
[root@foundation0 ~]# pvcreate /dev/sdb{7,8}
Physical volume "/dev/sdb7" successfully created
Physical volume "/dev/sdb8" successfully created
[root@foundation0 ~]# vgcreate lvm2 /dev/sdb{7,8}
Volume group "lvm2" successfully created
[root@foundation0 ~]# lvcreate -L 350M -n exam lvm2
Rounding up size to full physical extent 352.00 MiB
Logical volume "exam" created
[root@foundation0 ~]# lvs
LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert
exam lvm2 -wi-a----- 352.00m
LVM01 vgsdb -wi-ao---- 800.00m
[root@foundation0 ~]# mkfs.ext4 /dev/mapper/lvm2-exam
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
Stride=0 blocks, Stripe width=0 blocks
90112 inodes, 360448 blocks
18022 blocks (5.00%) reserved for the super user
First data block=1
Maximum filesystem blocks=33947648
44 block groups
8192 blocks per group, 8192 fragments per group
2048 inodes per group
Superblock backups stored on blocks:
8193, 24577, 40961, 57345, 73729, 204801, 221185
Allocating group tables: done
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done
[root@foundation0 ~]# mkdir /mnt/lvm2
[root@foundation0 ~]# mount /dev/mapper/lvm2-exam /mnt/lvm2/
[root@foundation0 vgsdb]# df -Th
Filesystem Type Size Used Avail Use% Mounted on
/dev/sda1 xfs 118G 14G 104G 12% /
devtmpfs devtmpfs 909M 0 909M 0% /dev
tmpfs tmpfs 918M 8.0K 918M 1% /dev/shm
tmpfs tmpfs 918M 8.7M 909M 1% /run
tmpfs tmpfs 918M 0 918M 0% /sys/fs/cgroup
/dev/loop0 iso9660 3.5G 3.5G 0 100% /content/rhel7.0/x86_64/dvd
/dev/loop1 xfs 509M 26M 483M 6% /run/media/root/0ea2b5d5-4f68-4abe-ae81-ea9a0175a730
/dev/mapper/vgsdb-LVM01 xfs 797M 18M 779M 3% /mnt/lvm
/dev/mapper/lvm2-exam ext4 333M 2.1M 310M 1% /mnt/lvm2
缩小lvm
xfs不支持：
ext2/ext3/ext4文件系统的调整命令是resize2fs（增大和减小都支持）
lvextend -L 120G /dev/mapper/centos-home //增大至120G
lvextend -L +20G /dev/mapper/centos-home //增加20G
lvreduce -L 50G /dev/mapper/centos-home //减小至50G
lvreduce -L -8G /dev/mapper/centos-home //减小8G
resize2fs /dev/mapper/centos-home //执行调整
[root@foundation0 vgsdb]# lvs
LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert
exam lvm2 -wi-a----- 352.00m
LVM01 vgsdb -wi-ao---- 800.00m
[root@foundation0 ~]# e2fsck -f /dev/mapper/lvm2-exam
e2fsck 1.42.9 (28-Dec-2013)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/mapper/lvm2-exam: 11/90112 files (0.0% non-contiguous), 21639/360448 blocks
缩小文件系统：
[root@foundation0 ~]# resize2fs /dev/mapper/lvm2-exam 200M
resize2fs 1.42.9 (28-Dec-2013)
Resizing the filesystem on /dev/mapper/lvm2-exam to 204800 (1k) blocks.
The filesystem on /dev/mapper/lvm2-exam is now 204800 blocks long.
缩小LV
缩小至200M
[root@foundation0 ~]# lvreduce -L 200M /dev/mapper/lvm2-exam
WARNING: Reducing active logical volume to 200.00 MiB
THIS MAY DESTROY YOUR DATA (filesystem etc.)
Do you really want to reduce exam? [y/n]: y
Reducing logical volume exam to 200.00 MiB
Logical volume exam successfully resized
[root@foundation0 ~]# lvs
LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert
exam lvm2 -wi-a----- 200.00m
LVM01 vgsdb -wi-ao---- 800.00m
[root@foundation0 ~]# vgs
VG #PV #LV #SN Attr VSize VFree
lvm2 2 1 0 wz--n- 1.48g 1.29g
vgsdb 5 1 0 wz--n- 2.13g 1.35g
[root@foundation0 ~]# vgremove exam /dev/sdb7
[root@foundation0 ~]# pvmove /dev/sdb7
/dev/sdb7: Moved: 6.0%
/dev/sdb7: Moved: 100.0%
[root@foundation0 ~]# pvs
PV VG Fmt Attr PSize PFree
/dev/sdb1 vgsdb lvm2 a-- 296.00m 296.00m
/dev/sdb2 vgsdb lvm2 a-- 396.00m 0
/dev/sdb3 vgsdb lvm2 a-- 496.00m 92.00m
/dev/sdb5 vgsdb lvm2 a-- 496.00m 496.00m
/dev/sdb6 vgsdb lvm2 a-- 496.00m 496.00m
/dev/sdb7 lvm2 lvm2 a-- 496.00m 496.00m #上面已没有数据了
/dev/sdb8 lvm2 lvm2 a-- 1020.00m 820.00m
[root@foundation0 ~]# vgreduce lvm2 /dev/sdb7
Removed "/dev/sdb7" from volume group "lvm2"
[root@foundation0 ~]# pvremove /dev/sdb7
Labels on physical volume "/dev/sdb7" successfully wiped
删除LVM
卸载文件系统：
umount /mnt/sdc1
umount /mnt/sdc3
1.删除LV
[root@foundation0 mapper]# lvremove --help
lvremove: Remove logical volume(s) from the system
lvremove
[-A|--autobackup y|n]
[-d|--debug]
[-f|--force]
[-h|--help]
[--noudevsync]
[-t|--test]
[-v|--verbose]
[--version]
LogicalVolume[Path] [LogicalVolume[Path]...]
[root@foundation0 mapper]# lvs
LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert
lvmsdc1 sdc1vg1 -wi-a----- 2.99g
lvol0 sdc3vg1 -wi-a----- 2.00g
[root@foundation0 mapper]# lvremove /dev/mapper/sdc1vg1
Do you really want to remove active logical volume lvmsdc1? [y/n]: y
Logical volume "lvmsdc1" successfully removed
[root@foundation0 mapper]# lvremove /dev/mapper/sdc3vg1
Do you really want to remove active logical volume lvol0? [y/n]: y
Logical volume "lvol0" successfully removed
删除VG:
[root@foundation0 mapper]# vgremove --help
vgremove: Remove volume group(s)
vgremove
[-d|--debug]
[-f|--force]
[-h|--help]
[--noudevsync]
[-t|--test]
[-v|--verbose]
[--version]
VolumeGroupName [VolumeGroupName...]
[root@foundation0 mapper]# vgs
VG #PV #LV #SN Attr VSize VFree
sdc1vg1 2 0 0 wz--n- 2.99g 2.99g
sdc3vg1 1 0 0 wz--n- 3.00g 3.00g
[root@foundation0 mapper]# vgremove sdc1vg1
Volume group "sdc1vg1" successfully removed
[root@foundation0 mapper]# vgremove sdc3vg1
Volume group "sdc3vg1" successfully removed
[root@foundation0 mapper]# vgs
No volume groups found
删除PV
[root@foundation0 mapper]# pvremove --help
pvremove: Remove LVM label(s) from physical volume(s)
pvremove
[-d|--debug]
[-f[f]|--force [--force]]
[-h|-?|--help]
[-t|--test]
[-v|--verbose]
[--version]
[-y|--yes]
PhysicalVolume [PhysicalVolume...]
[root@foundation0 mapper]# pvs
PV VG Fmt Attr PSize PFree
/dev/sdc1 lvm2 a-- 1.00g 1.00g
/dev/sdc2 lvm2 a-- 2.00g 2.00g
/dev/sdc3 lvm2 a-- 3.00g 3.00g
[root@foundation0 mapper]# pvremove /dev/sdc1
Labels on physical volume "/dev/sdc1" successfully wiped
[root@foundation0 mapper]# pvremove /dev/sdc2
Labels on physical volume "/dev/sdc2" successfully wiped
[root@foundation0 mapper]# pvremove /dev/sdc3
Labels on physical volume "/dev/sdc3" successfully wiped
[root@foundation0 mapper]# pvs
[root@foundation0 mapper]# lvs
No volume groups found
[root@foundation0 mapper]# vgs
No volume groups found
删除分区：
Disk /dev/sdc: 21.5 GB, 21474836480 bytes, 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0xbee7cf6f
Device Boot Start End Blocks Id System
/dev/sdc1 2048 2099199 1048576 8e Linux LVM
/dev/sdc2 2099200 6293503 2097152 8e Linux LVM
/dev/sdc3 6293504 12584959 3145728 8e Linux LVM
Command (m for help): d
Partition number (1-3, default 3): 1
Partition 1 is deleted
Command (m for help): d
Partition number (2,3, default 3): 2
Partition 2 is deleted
Command (m for help): d
Selected partition 3
Partition 3 is deleted
这样服务器上所有的LVM相关的组件全部卸载完成
