• CentOS添加新硬盘到新的分区(xfs/ext4) 或者添加新分区


     CentOs添加新硬盘到新的分区(xfs/ext4)  添加新分区

    转载请注明:http://www.cnblogs.com/juandx/p/5618162.html

    这篇文章介绍怎么添加一块新的硬盘,然后将其添加到一个新的分区或者一个已有的分区,比如增加根分区的大小

    比如在virtualbox中添加的硬盘也可以用这样的

     添加新分区

    fdisk -l
    可以看到新的硬盘 /dev/sdb
    
    fdisk /dev/sdb
    输入m查看提示
    输入n添加分区
    输入1新建一个分区
    然后默认回车2次创建成功(有人说第二次按w保存,但是我直接回车好像也没问题额)
    
    格式化分区 mkfs -t xfs  /dev/sdb
    
    新建一个自己想要挂载的目录 mkdir /opt/data/data1
    
    然后 mount -t xfs /dev/sdb /opt/data/data1
    
    df -lhT可以看到信息,ok了


    添加新硬盘到新的分区(xfs/ext4)

    fdisk -l
    可以看到新的硬盘 /dev/sdb
    fdisk /dev/sdb
    输入m查看提示
    输入n添加分区
    输入p选择primary
    输入1新建一个分区
    然后默认回车2次创建成功(有人说第二次按w保存,但是我直接回车好像也没问题额)
    
    格式化分区 mkfs -t xfs  /dev/sdb
    
    查看pv(物理卷)
    [root@wb201 /]# pvdisplay
      --- Physical volume ---
      PV Name               /dev/sda2
      VG Name               centos
      PV Size               7.51 GiB / not usable 3.00 MiB
      Allocatable           yes 
      PE Size               4.00 MiB
      Total PE              1922
      Free PE               10
      Allocated PE          1912
      PV UUID               8AV96r-QBvP-Hy6Q-uP1l-YI4b-UYom-GgIUNV
       
    创建pv
    [root@wb201 /]# pvcreate /dev/sdb 
    WARNING: xfs signature detected on /dev/sdb at offset 0. Wipe it? [y/n]: y
      Wiping xfs signature on /dev/sdb.
      Physical volume "/dev/sdb" successfully created
    [root@wb201 /]# pvdisplay
      --- Physical volume ---
      PV Name               /dev/sda2
      VG Name               centos
      PV Size               7.51 GiB / not usable 3.00 MiB
      Allocatable           yes 
      PE Size               4.00 MiB
      Total PE              1922
      Free PE               10
      Allocated PE          1912
      PV UUID               8AV96r-QBvP-Hy6Q-uP1l-YI4b-UYom-GgIUNV
       
      "/dev/sdb" is a new physical volume of "20.78 GiB"
      --- NEW Physical volume ---
      PV Name               /dev/sdb
      VG Name               
      PV Size               20.78 GiB
      Allocatable           NO
      PE Size               0   
      Total PE              0
      Free PE               0
      Allocated PE          0
      PV UUID               OjyuLL-5f4X-BoVB-hZBS-AJpZ-IeMV-JO6UHF
       
    查看vg(卷组)
    [root@wb201 /]# vgdisplay
      --- Volume group ---
      VG Name               centos
      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                1
      Act PV                1
      VG Size               7.51 GiB
      PE Size               4.00 MiB
      Total PE              1922
      Alloc PE / Size       1912 / 7.47 GiB
      Free  PE / Size       10 / 40.00 MiB
      VG UUID               iLRzhR-myQz-XQwG-XBnd-yH2V-2vhu-VWTtgm
       
    增加卷组
     [root@wb201 /]# vgextend centos /dev/sdb
      Volume group "centos" successfully extended
    
    查看lv(卷组)
    [root@wb201 /]# lvdisplay
      --- Logical volume ---
      LV Path                /dev/centos/swap
      LV Name                swap
      VG Name                centos
      LV UUID                dBjVT5-KvtT-t4zS-hWkh-cDvn-rXch-hc7SaA
      LV Write Access        read/write
      LV Creation host, time localhost, 2016-02-22 22:43:17 +0800
      LV Status              available
      # open                 2
      LV Size                820.00 MiB
      Current LE             205
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     8192
      Block device           253:1
       
      --- Logical volume ---
      LV Path                /dev/centos/root
      LV Name                root
      VG Name                centos
      LV UUID                6IJGJT-QEyI-bsQ2-O180-hRcI-T5U8-QBUcMA
      LV Write Access        read/write
      LV Creation host, time localhost, 2016-02-22 22:43:17 +0800
      LV Status              available
      # open                 1
      LV Size                6.67 GiB
      Current LE             1707
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     8192
      Block device           253:0
       
    看看现在卷组的情况
    [root@wb201 /]# vgdisplay
      --- Volume group ---
      VG Name               centos
      System ID             
      Format                lvm2
      Metadata Areas        2
      Metadata Sequence No  4
      VG Access             read/write
      VG Status             resizable
      MAX LV                0
      Cur LV                2
      Open LV               2
      Max PV                0
      Cur PV                2
      Act PV                2
      VG Size               28.28 GiB
      PE Size               4.00 MiB
      Total PE              7240
      Alloc PE / Size       1912 / 7.47 GiB
      Free  PE / Size       5328 / 20.81 GiB
      VG UUID               iLRzhR-myQz-XQwG-XBnd-yH2V-2vhu-VWTtgm
       
    看看现在逻辑卷的情况
    [root@wb201 /]# lvdisplay
      --- Logical volume ---
      LV Path                /dev/centos/swap
      LV Name                swap
      VG Name                centos
      LV UUID                dBjVT5-KvtT-t4zS-hWkh-cDvn-rXch-hc7SaA
      LV Write Access        read/write
      LV Creation host, time localhost, 2016-02-22 22:43:17 +0800
      LV Status              available
      # open                 2
      LV Size                820.00 MiB
      Current LE             205
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     8192
      Block device           253:1
       
      --- Logical volume ---
      LV Path                /dev/centos/root
      LV Name                root
      VG Name                centos
      LV UUID                6IJGJT-QEyI-bsQ2-O180-hRcI-T5U8-QBUcMA
      LV Write Access        read/write
      LV Creation host, time localhost, 2016-02-22 22:43:17 +0800
      LV Status              available
      # open                 1
      LV Size                6.67 GiB
      Current LE             1707
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     8192
      Block device           253:0
       
    
    增加物理卷到根目录,可以看到根目录是在/dev/centos/root
     [root@wb201 /]# lvextend -L +20.81G /dev/centos/root
      Rounding size to boundary between physical extents: 20.81 GiB
      Size of logical volume centos/root changed from 6.67 GiB (1707 extents) to 27.48 GiB (7035 extents).
      Logical volume root successfully resized.
    
    现在还没有增加,因为还没有更新
    [root@wb201 /]# df -h
    Filesystem               Size  Used Avail Use% Mounted on
    /dev/mapper/centos-root  6.7G  5.5G  1.3G  82% /
    devtmpfs                 1.9G     0  1.9G   0% /dev
    tmpfs                    1.9G     0  1.9G   0% /dev/shm
    tmpfs                    1.9G  8.4M  1.9G   1% /run
    tmpfs                    1.9G     0  1.9G   0% /sys/fs/cgroup
    /dev/sda1                497M  205M  292M  42% /boot
    tmpfs                    380M     0  380M   0% /run/user/0
    
    
    如果不xfs用resize2fs更新,但是xfs需要用xfs_growfs
    [root@wb201 /]# resize2fs /dev/centos/root
    resize2fs 1.42.9 (28-Dec-2013)
    resize2fs: Bad magic number in super-block while trying to open /dev/centos/root
    Couldn't find valid filesystem superblock.
    [root@wb201 /]# df -h
    Filesystem               Size  Used Avail Use% Mounted on
    /dev/mapper/centos-root  6.7G  5.5G  1.3G  82% /
    devtmpfs                 1.9G     0  1.9G   0% /dev
    tmpfs                    1.9G     0  1.9G   0% /dev/shm
    tmpfs                    1.9G  8.4M  1.9G   1% /run
    tmpfs                    1.9G     0  1.9G   0% /sys/fs/cgroup
    /dev/sda1                497M  205M  292M  42% /boot
    tmpfs                    380M     0  380M   0% /run/user/0
    [root@wb201 /]# xfs_growfs /dev/centos/root
    meta-data=/dev/mapper/centos-root isize=256    agcount=4, agsize=436992 blks
             =                       sectsz=512   attr=2, projid32bit=1
             =                       crc=0        finobt=0
    data     =                       bsize=4096   blocks=1747968, imaxpct=25
             =                       sunit=0      swidth=0 blks
    naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
    log      =internal               bsize=4096   blocks=2560, version=2
             =                       sectsz=512   sunit=0 blks, lazy-count=1
    realtime =none                   extsz=4096   blocks=0, rtextents=0
    data blocks changed from 1747968 to 7203840
    
    现在看就ok啦,哈哈
    [root@wb201 /]# df -h
    Filesystem               Size  Used Avail Use% Mounted on
    /dev/mapper/centos-root   28G  5.5G   23G  20% /
    devtmpfs                 1.9G     0  1.9G   0% /dev
    tmpfs                    1.9G     0  1.9G   0% /dev/shm
    tmpfs                    1.9G  8.4M  1.9G   1% /run
    tmpfs                    1.9G     0  1.9G   0% /sys/fs/cgroup
    /dev/sda1                497M  205M  292M  42% /boot
    tmpfs                    380M     0  380M   0% /run/user/0

    ok了,完美~

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  • 原文地址:https://www.cnblogs.com/juandx/p/5618162.html
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