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华为SAN存储在Red Hat系统下的主机连通性指南

华为SAN存储在Red Hat下的主机连通性指南
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常用配置命令

常用配置命令

创建物理卷

操作步骤描述如下:

  1. 主分区与逻辑分区的创建。

    通过fdisk -l命令发现映射过来的LUN后,就可以键入命令fdisk /dev/sdb(如果新映射过来的LUN显示为sdb)对磁盘sdb进行分区。

    [root@root ~]# fdisk /dev/sdb 
    Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel 
    Building a new DOS disklabel. Changes will remain in memory only, 
    until you decide to write them. After that, of course, the previous 
    content won't be recoverable. 
     
     
    The number of cylinders for this disk is set to 13054. 
    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) 
    Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) 
     
    Command (m for help):

    键入命令n创建新分区,选择p命令创建主分区,选择分区编号为1;选择起始柱面为默认值,结束柱面自己输入一个确定的值。

    Command (m for help): n 
    Command action 
       e   extended 
       p   primary partition (1-4) 
    p 
    Partition number (1-4): 1 
    First cylinder (1-13054, default 1):  
    Using default value 1 
    Last cylinder or +size or +sizeM or +sizeK (1-13054, default 13054): 200

    键入命令n创建新分区,选择e命令创建扩展分区,选择p命令查看分区情况。

    Command (m for help): n 
    Command action 
       e   extended 
       p   primary partition (1-4) 
    e 
    Partition number (1-4): 4 
    First cylinder (201-13054, default 201):  
    Using default value 201 
    Last cylinder or +size or +sizeM or +sizeK (201-13054, default 13054): 1000 
     
    Command (m for help): p 
     
    Disk /dev/sdb: 107.3 GB, 107374182400 bytes 
    255 heads, 63 sectors/track, 13054 cylinders 
    Units = cylinders of 16065 * 512 = 8225280 bytes 
     
       Device Boot      Start         End      Blocks   Id  System 
    /dev/sdb1               1         200     1606468+  83  Linux 
    /dev/sdb4             201        1000     6426000    5  Extended

    键入命令n创建新分区,选择l命令创建逻辑分区,选择p命令查看分区情况,选择w命令保存分区情况并退出。

    Command (m for help): n 
    Command action 
       l   logical (5 or over) 
       p   primary partition (1-4) 
    l 
    First cylinder (201-1000, default 201):  
    Using default value 201 
    Last cylinder or +size or +sizeM or +sizeK (201-1000, default 1000): 400 
     
    Command (m for help): p 
     
    Disk /dev/sdb: 107.3 GB, 107374182400 bytes 
    255 heads, 63 sectors/track, 13054 cylinders 
    Units = cylinders of 16065 * 512 = 8225280 bytes 
     
       Device Boot      Start         End      Blocks   Id  System 
    /dev/sdb1               1         200     1606468+  83  Linux 
    /dev/sdb4             201        1000     6426000    5  Extended 
    /dev/sdb5             201         400     1606468+  83  Linux     

  2. 创建LVM类型分区。

    下面的操作将盘符sdb的分区5和6转变成LVM类型分区。

    Command (m for help): p 
     
    Disk /dev/sdb: 107.3 GB, 107374182400 bytes 
    255 heads, 63 sectors/track, 13054 cylinders 
    Units = cylinders of 16065 * 512 = 8225280 bytes 
     
       Device Boot      Start         End      Blocks   Id  System 
    /dev/sdb1               1         200     1606468+  83  Linux 
    /dev/sdb4             201        1000     6426000    5  Extended 
    /dev/sdb5             201         400     1606468+  8e  Linux 
    /dev/sdb6             401         600     1606468+  83  Linux 
     
    Command (m for help): t 
    Partition number (1-6): 5 
    Hex code (type L to list codes): 8e 
    Changed system type of partition 6 to 8e (Linux LVM) 
     
    Command (m for help): t 
    Partition number (1-6): 6 
    Hex code (type L to list codes): 8e 
    Changed system type of partition 6 to 8e (Linux LVM) 
     
    Command (m for help): p 
     
    Disk /dev/sdb: 107.3 GB, 107374182400 bytes 
    255 heads, 63 sectors/track, 13054 cylinders 
    Units = cylinders of 16065 * 512 = 8225280 bytes 
     
       Device Boot      Start         End      Blocks   Id  System 
    /dev/sdb1               1         200     1606468+  83  Linux 
    /dev/sdb4             201        1000     6426000    5  Extended 
    /dev/sdb5             201         400     1606468+  8e  Linux LVM 
    /dev/sdb6             401         600     1606468+  8e  Linux LVM

  3. 使用pvcreate命令创建物理卷。

    [root@root ~]# pvcreate /dev/sdb5 
      Physical volume "/dev/sdb5" successfully created 
    [root@root ~]# pvcreate /dev/sdb6 
      Physical volume "/dev/sdb6" successfully created

  4. 使用pvdisplay -v查询物理卷是否创建成功。

    [root@root ~]# pvdisplay -v 
        Scanning for physical volume names 
        Wiping cache of LVM-capable devices 
      --- Physical volume --- 
      PV Name               /dev/sda2 
      VG Name               VolGroup00 
      PV Size               557.65 GB / not usable 21.17 MB 
      Allocatable           yes (but full) 
      PE Size (KByte)       32768 
      Total PE              17844 
      Free PE               0 
      Allocated PE          17844 
      PV UUID               KyucjQ-9zte-1Zyr-0sZ0-Xxzt-HVjZ-2vQp8B 
        
      "/dev/sdb5" is a new physical volume of "1.53 GB" 
      --- NEW Physical volume --- 
      PV Name               /dev/sdb5 
      VG Name                
      PV Size               1.53 GB 
      Allocatable           NO 
      PE Size (KByte)       0 
      Total PE              0 
      Free PE               0 
      Allocated PE          0 
      PV UUID               g60zN0-3sYn-qPbd-7y0M-dGfZ-hVs7-763Ywo 
        
      "/dev/sdb6" is a new physical volume of "1.53 GB" 
      --- NEW Physical volume --- 
      PV Name               /dev/sdb6 
      VG Name                
      PV Size               1.53 GB 
      Allocatable           NO 
      PE Size (KByte)       0 
      Total PE              0 
      Free PE               0 
      Allocated PE          0 
      PV UUID               5UhmY2-fS4p-gdCo-OOgZ-nOa9-AV3H-LkvrNc

修改物理卷大小

使用命令pvresize改变物理卷大小,命令格式为

pvresize --setphysicalvolumesize 容量大小(单位m、g)设备名称

下面的操作将原大小为1.53GB的PV更改为300M。

[root@root ~]# pvscan 
  PV /dev/sda2   VG VolGroup00      lvm2 [557.62 GB / 0    free]
  PV /dev/sdb5                      lvm2 [1.53 GB]
  PV /dev/sdb6                      lvm2 [1.53 GB]
  Total: 3 [560.69 GB] / in use: 1 [557.62 GB] / in no VG: 2 [3.06 GB]
 [root@root ~]# pvresize --setphysicalvolumesize 300 /dev/sdb5
  Physical volume "/dev/sdb5" changed
  1 physical volume(s) resized / 0 physical volume(s) not resized
[root@root ~]# pvscan 
  PV /dev/sda2   VG VolGroup00      lvm2 [557.62 GB / 0    free]
  PV /dev/sdb5                      lvm2 [300.00 MB]
  PV /dev/sdb6                      lvm2 [1.53 GB]
  Total: 3 [559.45 GB] / in use: 1 [557.62 GB] / in no VG: 2 [1.83 GB]

创建卷组

使用命令vgcreate创建卷组。

[root@root ~]# vgcreate vg0 /dev/sdb5 /dev/sdb6
  Volume group "vg0" successfully created

扩展卷组

命令格式如下:

vgextend vgname pvname

操作例子如下所示:

[root@root ~]# vgdisplay -v /dev/vg0
    Using volume group(s) on command line
    Finding volume group "vg0"
  --- 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               1.82 GB
  PE Size               4.00 MB
  Total PE              466
  Alloc PE / Size       0 / 0   
  Free  PE / Size       466 / 1.82 GB
  VG UUID               ARkbdL-9ID6-5HCy-DSQG-Aj5z-dQap-9VkM5X
  --- Physical volumes ---
  PV Name               /dev/sdb5     
  PV UUID               g60zN0-3sYn-qPbd-7y0M-dGfZ-hVs7-763Ywo
  PV Status             allocatable
  Total PE / Free PE    74 / 74
  PV Name               /dev/sdb6     
  PV UUID               5UhmY2-fS4p-gdCo-OOgZ-nOa9-AV3H-LkvrNc
  PV Status             allocatable
  Total PE / Free PE    392 / 392
[root@root ~]# vgextend /dev/vg0 /dev/sdb7
  Volume group "vg0" successfully extended
[root@root ~]# vgdisplay -v /dev/vg0
    Using volume group(s) on command line
    Finding volume group "vg0"
  --- Volume group ---
  VG Name               vg0
  System ID             
  Format                lvm2
  Metadata Areas        3
  Metadata Sequence No  2
  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               3.35 GB
  PE Size               4.00 MB
  Total PE              858
  Alloc PE / Size       0 / 0   
  Free  PE / Size       858 / 3.35 GB
  VG UUID               ARkbdL-9ID6-5HCy-DSQG-Aj5z-dQap-9VkM5X
  --- Physical volumes ---
  PV Name               /dev/sdb5     
  PV UUID               g60zN0-3sYn-qPbd-7y0M-dGfZ-hVs7-763Ywo
  PV Status             allocatable
  Total PE / Free PE    74 / 74
  PV Name               /dev/sdb6     
  PV UUID               5UhmY2-fS4p-gdCo-OOgZ-nOa9-AV3H-LkvrNc
  PV Status             allocatable
  Total PE / Free PE    392 / 392
  PV Name               /dev/sdb7     
  PV UUID               iF5Att-fVIj-9dOy-5055-rJlq-pOrS-aW8g2P
  PV Status             allocatable
  Total PE / Free PE    392 / 392

卷组/dev/vg0中原本包含有物理卷:/dev/sdb5和/dev/sdb6。上面的命令将物理卷:/dev/sdb7加入该卷组中,从而达到扩展卷组的目的。

创建逻辑卷

操作步骤描述如下:

  1. 使用交互式命令lvcreate命令创建逻辑卷,例子如下所示:

    [root@root ~]# lvcreate -L 10m -n lv0 vg0 
      Rounding up size to full physical extent 12.00 MB 
      Logical volume "lv0" created

    上面的命令中,部分参数解释如下:

    • -L:Logical_volume_size,以MB为单位的逻辑卷大小。
    • -n:逻辑卷的名字。

  2. 查看创建的逻辑卷,确认卷的信息无误。

    [root@root ~]# vgdisplay -v vg0 
        Using volume group(s) on command line 
        Finding volume group "vg0" 
      --- Volume group --- 
      VG Name               vg0 
      System ID              
      Format                lvm2 
      Metadata Areas        3 
      Metadata Sequence No  3 
      VG Access             read/write 
      VG Status             resizable 
      MAX LV                0 
      Cur LV                1 
      Open LV               0 
      Max PV                0 
      Cur PV                3 
      Act PV                3 
      VG Size               3.35 GB 
      PE Size               4.00 MB 
      Total PE              858 
      Alloc PE / Size       3 / 12.00 MB 
      Free  PE / Size       855 / 3.34 GB 
      VG UUID               ARkbdL-9ID6-5HCy-DSQG-Aj5z-dQap-9VkM5X 
        
      --- Logical volume --- 
      LV Name                /dev/vg0/lv0 
      VG Name                vg0 
      LV UUID                H6uskM-6clf-NVh2-KMiO-1Gk2-0iBz-nXOav2 
      LV Write Access        read/write 
      LV Status              available 
      # open                 0 
      LV Size                12.00 MB 
      Current LE             3 
      Segments               1 
      Allocation             inherit 
      Read ahead sectors     auto 
      - currently set to     256 
      Block device           253:2 
        
      --- Physical volumes --- 
      PV Name               /dev/sdb5      
      PV UUID               g60zN0-3sYn-qPbd-7y0M-dGfZ-hVs7-763Ywo 
      PV Status             allocatable 
      Total PE / Free PE    74 / 74 
        
      PV Name               /dev/sdb6      
      PV UUID               5UhmY2-fS4p-gdCo-OOgZ-nOa9-AV3H-LkvrNc 
      PV Status             allocatable 
      Total PE / Free PE    392 / 389 
        
      PV Name               /dev/sdb7      
      PV UUID               iF5Att-fVIj-9dOy-5055-rJlq-pOrS-aW8g2P 
      PV Status             allocatable 
      Total PE / Free PE    392 / 392 
    [root@root ~]# lvdisplay -v /dev/vg0/lv0  
        Using logical volume(s) on command line 
      --- Logical volume --- 
      LV Name                /dev/vg0/lv0 
      VG Name                vg0 
      LV UUID                H6uskM-6clf-NVh2-KMiO-1Gk2-0iBz-nXOav2 
      LV Write Access        read/write 
      LV Status              available 
      # open                 0 
      LV Size                12.00 MB 
      Current LE             3 
      Segments               1 
      Allocation             inherit 
      Read ahead sectors     auto 
      - currently set to     256 
      Block device           253:2 

创建文件系统

操作步骤描述如下:

  1. 使用mkfs.xx命令创建文件系统。例子如下:

    [root@root ~]# mkfs.ext3 /dev/vg0/rlv0  
    mke2fs 1.39 (29-May-2006) 
    Filesystem label= 
    OS type: Linux 
    Block size=1024 (log=0) 
    Fragment size=1024 (log=0) 
    3072 inodes, 12288 blocks 
    614 blocks (5.00%) reserved for the super user 
    First data block=1 
    Maximum filesystem blocks=12582912 
    2 block groups 
    8192 blocks per group, 8192 fragments per group 
    1536 inodes per group 
    Superblock backups stored on blocks:  
    8193 
     
    Writing inode tables: done                             
    Creating journal (1024 blocks): done 
    Writing superblocks and filesystem accounting information: done 
     
    This filesystem will be automatically checked every 20 mounts or 
    180 days, whichever comes first.  Use tune2fs -c or -i to override.

  2. 创建相应的挂载点,并将逻辑卷挂载起来。

    [root@root ~]# mkdir /test/mnt1 
    [root@root ~]# mount /dev/vg0/lv0 /test/mnt1/

  3. 显示挂载信息。

    [root@root ~]# df -l 
    Filesystem           1K-blocks      Used Available Use% Mounted on 
    /dev/mapper/VolGroup00-LogVol00 
                         548527904   3105828 517108888   1% / 
    /dev/sda1               101086     15667     80200  17% /boot 
    tmpfs                  8137904         0   8137904   0% /dev/shm 
    /dev/mapper/vg0-lv0      11895      1138     10143  11% /test/mnt1

    如上所示,逻辑卷挂载正常,后续即可对其进行读写操作。

  4. 如果需要卸载卷,则可以执行下面的命令:

    [root@root ~]# umount /dev/vg0/lv0  
    [root@root ~]# df -l 
    Filesystem           1K-blocks      Used Available Use% Mounted on 
    /dev/mapper/VolGroup00-LogVol00 
                         548527904   3105828 517108888   1% / 
    /dev/sda1               101086     15667     80200  17% /boot 
    tmpfs                  8137904         0   8137904   0% /dev/shm 

扩展逻辑卷

扩展逻辑卷使用lvextend命令,其格式为

lvextend  -L +要扩展的容量大小  逻辑卷路径

示例如下:

[root@root ~]# lvscan 
  ACTIVE            '/dev/vg0/lv0' [12.00 MB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol00' [540.03 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol01' [17.59 GB] inherit
[root@root ~]# pvscan 
  PV /dev/sdb5   VG vg0          lvm2 [296.00 MB / 296.00 MB free]
  PV /dev/sdb6   VG vg0          lvm2 [1.53 GB / 1.52 GB free]
  PV /dev/sdb7   VG vg0          lvm2 [1.53 GB / 1.53 GB free]
  PV /dev/sda2   VG VolGroup00   lvm2 [557.62 GB / 0    free]
  Total: 4 [560.98 GB] / in use: 4 [560.98 GB] / in no VG: 0 [0   ]
[root@root ~]# lvextend -L +100m /dev/vg0/lv0 
  Extending logical volume lv0 to 112.00 MB
  Logical volume lv0 successfully resized
[root@root ~]# lvscan 
  ACTIVE            '/dev/vg0/lv0' [112.00 MB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol00' [540.03 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol01' [17.59 GB] inherit
[root@root ~]# pvscan 
  PV /dev/sdb5   VG vg0          lvm2 [296.00 MB / 296.00 MB free]
  PV /dev/sdb6   VG vg0          lvm2 [1.53 GB / 1.42 GB free]
  PV /dev/sdb7   VG vg0          lvm2 [1.53 GB / 1.53 GB free]
  PV /dev/sda2   VG VolGroup00   lvm2 [557.62 GB / 0    free]
  Total: 4 [560.98 GB] / in use: 4 [560.98 GB] / in no VG: 0 [0   ]

从上面的显示可以发现,逻辑卷的容量已经更新,扩展成功。

缩减逻辑卷

缩减逻辑卷使用lvreduce命令,其格式为

lvreduce  -L -要扩展的容量大小  逻辑卷路径

示例如下:

[root@root ~]# lvscan 
  ACTIVE            '/dev/vg0/lv0' [112.00 MB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol00' [540.03 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol01' [17.59 GB] inherit
[root@root ~]# pvscan 
  PV /dev/sdb5   VG vg0          lvm2 [296.00 MB / 296.00 MB free]
  PV /dev/sdb6   VG vg0          lvm2 [1.53 GB / 1.42 GB free]
  PV /dev/sdb7   VG vg0          lvm2 [1.53 GB / 1.53 GB free]
  PV /dev/sda2   VG VolGroup00   lvm2 [557.62 GB / 0    free]
  Total: 4 [560.98 GB] / in use: 4 [560.98 GB] / in no VG: 0 [0   ]
[root@root ~]# lvreduce -L -100m /dev/vg0/lv0 
  WARNING: Reducing active logical volume to 12.00 MB
  THIS MAY DESTROY YOUR DATA (filesystem etc.)
Do you really want to reduce lv0? [y/n]: y
  Reducing logical volume lv0 to 12.00 MB
  Logical volume lv0 successfully resized
[root@root ~]# lvscan 
  ACTIVE            '/dev/vg0/lv0' [12.00 MB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol00' [540.03 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol01' [17.59 GB] inherit
[root@root ~]# pvscan 
  PV /dev/sdb5   VG vg0          lvm2 [296.00 MB / 296.00 MB free]
  PV /dev/sdb6   VG vg0          lvm2 [1.53 GB / 1.52 GB free]
  PV /dev/sdb7   VG vg0          lvm2 [1.53 GB / 1.53 GB free]
  PV /dev/sda2   VG VolGroup00   lvm2 [557.62 GB / 0    free]
  Total: 4 [560.98 GB] / in use: 4 [560.98 GB] / in no VG: 0 [0   ]

从上面的显示可以发现,逻辑卷的容量已经更新,缩减成功。

激活卷组

激活卷组的命令格式如下:

vgchange -a  y 卷组名称

例子如下所示:

[root@root ~]# vgchange -a y /dev/vg0
  1 logical volume(s) in volume group "vg0" now active

去激活卷组

去激活命令格式如下:

vgchange –a n 卷组名称

例子如下所示:

[root@root ~]# vgchange -a n /dev/vg0
  0 logical volume(s) in volume group "vg0" now active

导出卷组

在集群、数据备份和数据恢复等应用场景时,需要导入或导出卷组。

导出卷组命令格式如下:

vgexport卷组名称

例子如下所示:

[root@root ~]# vgexport vg0
  Volume group "vg0" successfully exported
[root@root ~]# pvscan 
  PV /dev/sdb5    is in exported VG vg0 [296.00 MB / 296.00 MB free]
  PV /dev/sdb6    is in exported VG vg0 [1.53 GB / 1.52 GB free]
  PV /dev/sdb7    is in exported VG vg0 [1.53 GB / 1.53 GB free]
  PV /dev/sda2   VG VolGroup00   lvm2 [557.62 GB / 0    free]
  Total: 4 [560.98 GB] / in use: 4 [560.98 GB] / in no VG: 0 [0   ]

导入卷组

导入卷组命令格式如下:

vgimport卷组名称 

例子如下所示(在本机上导入卷组):

[root@root ~]# vgimport vg0
  Volume group "vg0" successfully imported
[root@root ~]# pvscan 
  PV /dev/sdb5   VG vg0          lvm2 [296.00 MB / 296.00 MB free]
  PV /dev/sdb6   VG vg0          lvm2 [1.53 GB / 1.52 GB free]
  PV /dev/sdb7   VG vg0          lvm2 [1.53 GB / 1.53 GB free]
  PV /dev/sda2   VG VolGroup00   lvm2 [557.62 GB / 0    free]
  Total: 4 [560.98 GB] / in use: 4 [560.98 GB] / in no VG: 0 [0   ]

删除逻辑卷

命令格式如下:

lvremove lvname

例子如下所示:

[root@root ~]# lvscan 
  inactive          '/dev/vg0/lv0' [12.00 MB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol00' [540.03 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol01' [17.59 GB] inherit
[root@root ~]# lvremove /dev/vg0/lv0
  Logical volume "lv0" successfully removed
[root@root ~]# lvscan 
  ACTIVE            '/dev/VolGroup00/LogVol00' [540.03 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol01' [17.59 GB] inherit

删除卷组

命令格式如下所示:

vgremove vgname

操作步骤描述如下:

  1. 确保卷组上的逻辑卷已经全部删除。

    [root@root ~]# vgdisplay -v /dev/vg0 
        Using volume group(s) on command line 
        Finding volume group "vg0" 
      --- Volume group --- 
      VG Name               vg0 
      System ID              
      Format                lvm2 
      Metadata Areas        3 
      Metadata Sequence No  8 
      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               3.35 GB 
      PE Size               4.00 MB 
      Total PE              858 
      Alloc PE / Size       0 / 0    
      Free  PE / Size       858 / 3.35 GB 
      VG UUID               ARkbdL-9ID6-5HCy-DSQG-Aj5z-dQap-9VkM5X 
        
      --- Physical volumes --- 
      PV Name               /dev/sdb5      
      PV UUID               g60zN0-3sYn-qPbd-7y0M-dGfZ-hVs7-763Ywo 
      PV Status             allocatable 
      Total PE / Free PE    74 / 74 
        
      PV Name               /dev/sdb6      
      PV UUID               5UhmY2-fS4p-gdCo-OOgZ-nOa9-AV3H-LkvrNc 
      PV Status             allocatable 
      Total PE / Free PE    392 / 392 
        
      PV Name               /dev/sdb7      
      PV UUID               iF5Att-fVIj-9dOy-5055-rJlq-pOrS-aW8g2P 
      PV Status             allocatable 
      Total PE / Free PE    392 / 392

  2. 删除卷组。

    [root@root ~]# vgremove /dev/vg0 
      Volume group "vg0" successfully removed 
    [root@root ~]# vgdisplay -v /dev/vg0 
        Using volume group(s) on command line 
        Finding volume group "vg0" 
        Wiping cache of LVM-capable devices 
      Volume group "vg0" not found

删除物理卷

删除物理卷的命令格式如下:

pvremove 裸设备名

例子如下所示:

[root@root ~]# pvremove /dev/sdb5
  Labels on physical volume "/dev/sdb5" successfully wiped
[root@root ~]# pvremove /dev/sdb6
  Labels on physical volume "/dev/sdb6" successfully wiped
[root@root ~]# pvremove /dev/sdb7
  Labels on physical volume "/dev/sdb7" successfully wiped
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更新时间:2019-09-12

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