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
  Free PE
  Allocated PE
  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 . 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
  Free PE
  Allocated PE
  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
  Total PE
  Free PE
  Allocated PE
  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
  Metadata Sequence No
  VG Access             read/write
  VG Status             resizable
  MAX LV
  Cur LV
  Open LV
  Max PV
  Cur PV
  Act PV
  VG Size               7.51 GiB
  PE Size               4.00 MiB
  Total PE
  Alloc PE / Size        / 7.47 GiB
  Free  PE / Size        / 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, -- :: +
  LV Status              available
  # open
  LV Size                820.00 MiB
  Current LE
  Segments
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to
  Block device           :

  --- 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, -- :: +
  LV Status              available
  # open
  LV Size                6.67 GiB
  Current LE
  Segments
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to
  Block device           :

看看现在卷组的情况
[root@wb201 /]# vgdisplay
  --- Volume group ---
  VG Name               centos
  System ID
  Format                lvm2
  Metadata Areas
  Metadata Sequence No
  VG Access             read/write
  VG Status             resizable
  MAX LV
  Cur LV
  Open LV
  Max PV
  Cur PV
  Act PV
  VG Size               28.28 GiB
  PE Size               4.00 MiB
  Total PE
  Alloc PE / Size        / 7.47 GiB
  Free  PE / Size        / 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, -- :: +
  LV Status              available
  # open
  LV Size                820.00 MiB
  Current LE
  Segments
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to
  Block device           :

  --- 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, -- :: +
  LV Status              available
  # open
  LV Size                6.67 GiB
  Current LE
  Segments
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to
  Block device           :

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 +.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 ( extents) to 27.48 GiB ( 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  .7G  .5G  .3G  % /
devtmpfs                 .9G       .9G   % /dev
tmpfs                    .9G       .9G   % /dev/shm
tmpfs                    .9G  8.4M  .9G   % /run
tmpfs                    .9G       .9G   % /sys/fs/cgroup
/dev/sda1                497M  205M  292M  % /boot
tmpfs                    380M       380M   % /run/user/

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. (-Dec-)
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  .7G  .5G  .3G  % /
devtmpfs                 .9G       .9G   % /dev
tmpfs                    .9G       .9G   % /dev/shm
tmpfs                    .9G  8.4M  .9G   % /run
tmpfs                    .9G       .9G   % /sys/fs/cgroup
/dev/sda1                497M  205M  292M  % /boot
tmpfs                    380M       380M   % /run/user/
[root@wb201 /]# xfs_growfs /dev/centos/root
meta-data=/dev/mapper/centos-root isize=    agcount=, agsize= blks
         =                       sectsz=   attr=, projid32bit=
         =                       crc=        finobt=
data     =                       bsize=   blocks=, imaxpct=
         =                       sunit=      swidth= blks
naming   =version               bsize=   ascii-ci= ftype=
log      =internal               bsize=   blocks=, version=
         =                       sectsz=   sunit= blks, lazy-count=
realtime =none                   extsz=   blocks=, rtextents=
data blocks changed from  to 

现在看就ok啦，哈哈
[root@wb201 /]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   28G  .5G   23G  % /
devtmpfs                 .9G       .9G   % /dev
tmpfs                    .9G       .9G   % /dev/shm
tmpfs                    .9G  8.4M  .9G   % /run
tmpfs                    .9G       .9G   % /sys/fs/cgroup
/dev/sda1                497M  205M  292M  % /boot
tmpfs                    380M       380M   % /run/user/

ok了，完美~