一、硬件环境
a) CPU:
AMD Athlon 64 X2 Dual Core Processor 4400+
b) 硬盘
硬盘：单硬盘：80G SATA
Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
二、操作系统
Linux版本： Red Hat Enterprise Linux AS release 5 x86_64位
Kernel版本： 2.6.18-8.el5 #1 SMP x86_64
三、已有LVM
/dev/mapper/ggyyvg-ggyylv 2.8G 69M 2.6G 3% /mnt/lvm1
LV Name /dev/ggyyvg/ggyylv
四、删除LVM
A)umount挂载点
[root@localhost mnt]# umount lvm1
B）删除LV
[root@localhost mnt]# lvdisplay
--- Logical volume ---
LV Name /dev/ggyyvg/ggyylv
VG Name ggyyvg
LV UUID aU0ncf-e66C-Urkw-d4oh-KNy8-gCAf-f80PcH
LV Write Access read/write
LV Status available
# open 0
LV Size 2.81 GB
Current LE 720
Segments 3
Allocation inherit
Read ahead sectors 0
Block device 253:0
[root@localhost mnt]# lvremove /dev/ggyyvg/ggyylv
Do you really want to remove active logical volume "ggyylv"? [y/n]: y
Logical volume "ggyylv" successfully removed
C）删除VG
[root@localhost mnt]# vgdisplay
--- Volume group ---
VG Name ggyyvg
System ID
Format lvm2
Metadata Areas 3
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 3
Act PV 3
VG Size 2.81 GB
PE Size 4.00 MB
Total PE 720
Alloc PE / Size 0 / 0
Free PE / Size 720 / 2.81 GB
VG UUID eglfo6-8vf1-IewM-ZQnp-P2mm-I6cs-oR13ns
[root@localhost mnt]# vgremove ggyyvg
Volume group "ggyyvg" successfully removed
D）删除PV
[root@localhost mnt]# pvdisplay
--- NEW Physical volume ---
PV Name /dev/sda9
VG Name
PV Size 486.31 MB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID jW9lXC-o5iO-Xxvd-44if-Ydrh-xMJd-md2H0C
--- NEW Physical volume ---
PV Name /dev/sda10
VG Name
PV Size 964.81 MB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID H2FgzL-pFlE-cNU1-mI38-ysOA-yooZ-Op6UoS
--- NEW Physical volume ---
PV Name /dev/sda11
VG Name
PV Size 1.40 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID d7sumA-ty4j-XaS6-4AEE-Fgo4-ZtGX-LrC3Gr
[root@localhost mnt]# pvremove /dev/sda9
Labels on physical volume "/dev/sda9" successfully wiped
[root@localhost mnt]# pvremove /dev/sda10
Labels on physical volume "/dev/sda10" successfully wiped
[root@localhost mnt]# pvremove /dev/sda11
Labels on physical volume "/dev/sda11" successfully wiped
[root@localhost mnt]# pvdisplay
E）删除物理分区
[root@localhost mnt]# fdisk /dev/sda
The number of cylinders for this disk is set to 9729.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Command (m for help): p
Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 25 200781 83 Linux
/dev/sda2 26 2575 20482875 83 Linux
/dev/sda3 2576 3850 10241437+ 83 Linux
/dev/sda4 3851 9729 47223067+ 5 Extended
/dev/sda5 3851 5125 10241406 83 Linux
/dev/sda6 5126 6400 10241406 83 Linux
/dev/sda7 6401 7037 5116671 83 Linux
/dev/sda8 7038 7050 104391 83 Linux
/dev/sda9 7051 7112 497983+ 83 Linux
/dev/sda10 7113 7235 987966 83 Linux
/dev/sda11 7236 7418 1469916 83 Linux
Command (m for help): d
Partition number (1-11): 11
Command (m for help): d
Partition number (1-10): 10
Command (m for help): d
Partition number (1-9): 9
Command (m for help): p
Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 25 200781 83 Linux
/dev/sda2 26 2575 20482875 83 Linux
/dev/sda3 2576 3850 10241437+ 83 Linux
/dev/sda4 3851 9729 47223067+ 5 Extended
/dev/sda5 3851 5125 10241406 83 Linux
/dev/sda6 5126 6400 10241406 83 Linux
/dev/sda7 6401 7037 5116671 83 Linux
/dev/sda8 7038 7050 104391 83 Linux
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.
Syncing disks.
F）删除/dev/ggyyvg
Rm –rf /dev/ggyyvg
总结，删除是安装的逆过程，应该好理解
