WARNING: Duplicate VG name VolGroup00故障处理

今天再给硬盘扩容时，发现报如下错误，因为准备采用lvm方式，过程如下：

[root@localhost /]# df -h

Filesystem            Size  Used Avail Use% Mounted on

/dev/mapper/VolGroup00-LogVol00

                      265G  9.4G  242G   4% /

/dev/sda1              99M   13M   82M  14% /boot

tmpfs                 7.9G     0  7.9G   0% /dev/shm

[root@localhost ~]# fdisk -l

Disk /dev/sda: 300.0 GB, 300000000000 bytes

255 heads, 63 sectors/track, 36472 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *           1          13      104391   83  Linux

/dev/sda2              14       36472   292856917+  8e  Linux LVM

Disk /dev/sdb: 300.0 GB, 300000000000 bytes

Disk /dev/sdb doesn't contain a valid partition table

Disk /dev/sdc: 300.0 GB, 300000000000 bytes

/dev/sdc1               1       36404   292415098+  83  Linux

[root@localhost ~]# vgdisplay 

  WARNING: Duplicate VG name VolGroup00: Existing DNcBFY-oAjY-PfDb-SCmI-uxhi-Z2Vd-tdKO4D (created here) takes precedence over RRuDfr-oVRx-stg9-FEWE-tDiO-IaWz-mzf6Wu

  WARNING: Duplicate VG name VolGroup00: Existing RRuDfr-oVRx-stg9-FEWE-tDiO-IaWz-mzf6Wu (created here) takes precedence over DNcBFY-oAjY-PfDb-SCmI-uxhi-Z2Vd-tdKO4D

  Couldn't find device with uuid 'ly1rfp-OwP8-hErB-frpG-3dUI-Xm81-w5e2VH'.

  --- Volume group ---

  VG Name               VolGroup00

  System ID            

  Format                lvm2

  Metadata Areas        1

  Metadata Sequence No  3

  VG Access             read/write

  VG Status             resizable

  MAX LV                0

  Cur LV                2

  Open LV               2

  Max PV                0

  Cur PV                2

  Act PV                1

  VG Size               557.59 GB

  PE Size               32.00 MB

  Total PE              17843

  Alloc PE / Size       17843 / 557.59 GB

  Free  PE / Size       0 / 0  

  VG UUID               RRuDfr-oVRx-stg9-FEWE-tDiO-IaWz-mzf6Wu

  Metadata Sequence No  5

  Cur PV                1

  VG Size               279.28 GB

  Total PE              8937

  Alloc PE / Size       8937 / 279.28 GB

  VG UUID               DNcBFY-oAjY-PfDb-SCmI-uxhi-Z2Vd-tdKO4D

[root@localhost ~]# vgdisplay VolGroup00

[root@localhost ~]# pvs

  PV             VG         Fmt  Attr PSize   PFree

  /dev/sda2      VolGroup00 lvm2 a-   279.28G    0

  /dev/sdb1      VolGroup00 lvm2 a-   278.84G    0

  unknown device VolGroup00 lvm2 a-   278.75G    0

[root@localhost ~]# pvremove -ff /dev/sdb1

Really WIPE LABELS from physical volume "/dev/sdb1" of volume group "VolGroup00" [y/n]? y

  WARNING: Wiping physical volume label from /dev/sdb1 of volume group "VolGroup00"

  Labels on physical volume "/dev/sdb1" successfully wiped

[root@localhost ~]# pvremove -ff /dev/sdc1

  No physical volume label read from /dev/sdc1

  Labels on physical volume "/dev/sdc1" successfully wiped

[root@localhost ~]# vgdisplay

  PV         VG         Fmt  Attr PSize   PFree

  /dev/sda2  VolGroup00 lvm2 a-   279.28G    0

[root@localhost ~]# pvdisplay

  --- Physical volume ---

  PV Name               /dev/sda2

  PV Size               279.29 GB / not usable 9.08 MB

  Allocatable           yes (but full)

  PE Size (KByte)       32768

  Free PE               0

  Allocated PE          8937

  PV UUID               1aI0yo-TdQq-kkdY-effq-YBWu-Gefw-wLH6tC

[root@localhost ~]# pvcreate /dev/sdb1

pvs

vgdisplay

pvcreate /dev/sdc1

  Physical volume "/dev/sdb1" successfully created

vgextend VolGroup00 /dev/sdb1

vgextend VolGroup00 /dev/sdc1

lvresize -L +558G /dev//VolGroup00/LogVol00

lvresize -L +768M /dev//VolGroup00/LogVol00

vgdisplay   PV         VG         Fmt  Attr PSize   PFree 

  /dev/sda2  VolGroup00 lvm2 a-   279.28G      0

  /dev/sdb1             lvm2 --   279.39G 279.39G

[root@localhost ~]# pvcreate /dev/sdc1

  Physical volume "/dev/sdc1" successfully created

[root@localhost ~]# vgextend VolGroup00 /dev/sdb1

  Volume group "VolGroup00" successfully extended

[root@localhost ~]# vgextend VolGroup00 /dev/sdc1

  Metadata Areas        3

  Metadata Sequence No  7

  Cur PV                3

  Act PV                3

  VG Size               838.03 GB

  Total PE              26817

  Free  PE / Size       17880 / 558.75 GB

[root@localhost ~]# lvresize -L +558G /dev//VolGroup00/LogVol00

  Extending logical volume LogVol00 to 831.47 GB

  Logical volume LogVol00 successfully resized

  Metadata Sequence No  8

  Alloc PE / Size       26793 / 837.28 GB

  Free  PE / Size       24 / 768.00 MB

[root@localhost ~]# lvresize -L +768M /dev//VolGroup00/LogVol00

  Extending logical volume LogVol00 to 832.22 GB

  Metadata Sequence No  9

  Alloc PE / Size       26817 / 838.03 GB

[root@localhost ~]# resize2fs /dev/mapper/VolGroup00-LogVol00

resize2fs 1.39 (29-May-2006)

Filesystem at /dev/mapper/VolGroup00-LogVol00 is mounted on /; on-line resizing required

Performing an on-line resize of /dev/mapper/VolGroup00-LogVol00 to 218161152 (4k) blocks.

The filesystem on /dev/mapper/VolGroup00-LogVol00 is now 218161152 blocks long.

【语    法】pvremove [选项] [参数]

【功能介绍】pvremove指令用于删除一个存在的物理卷。

【选项说明】

选    项	功    能
-d	调试模式
-f	强制删除
-y	对提问回答“yes”

【参数说明】

参    数
物理卷	指定要删除的物理卷对应的设备文件名

【经验技巧】使用pvremove指令删除物理卷时，它将LVM分区上的物理卷信息删除，使其不再被视为一个物理卷。