linux新增一块硬盘加入原有分区

原有硬盘空间已经不足，添加一块新硬盘，并且加入到原根目录下

查看新硬盘

1 2	fdisk -l Disk /dev/sdb: 240.1 GB, 240057409536 bytes

在新硬盘上创建Lvm分区

1 2	fdisk /dev/sdb

输入输出如下：

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Command (m for help): n Command action    e   extended    p   primary partition (1-4) p Partition number (1-4): 1 First cylinder (1-29185, default 1): Using default value 1 Last cylinder, +cylinders or +size{K,M,G} (1-29185, default 29185): Using default value 29185    Command (m for help): t Selected partition 1 Hex code (type L to list codes): 8e Changed system type of partition 1 to 8e (Linux LVM)    Command (m for help): p    Disk /dev/sdb: 240.1 GB, 240057409536 bytes 255 heads, 63 sectors/track, 29185 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x40044fad       Device Boot      Start         End      Blocks   Id  System /dev/sdb1               1       29185   234428481   8e  Linux LVM Partition 1 does not start on physical sector boundary.    Command (m for help): w

查看分区

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fdisk -l     Device Boot      Start         End      Blocks   Id  System /dev/sdb1               1       29185   234428481   8e  Linux LVM

可以看到已经成功创建了LVM分区: /dev/sdb1

建立物理卷 

1	pvcreate /dev/sdb1

查看原有VG

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[root@localhost ~]# vgdisplay   --- Volume group ---   VG Name               VolGroup   System ID               Format                lvm2   Metadata Areas        1   Metadata Sequence No  9   VG Access             read/write   VG Status             resizable   MAX LV                0   Cur LV                3   Open LV               3   Max PV                0   Cur PV                1   Act PV                1   VG Size               111.30 GiB   PE Size               4.00 MiB   Total PE              28492   Alloc PE / Size       28378 / 110.85 GiB   Free  PE / Size       114 / 456.00 MiB

可以看到VG Name为VolGroup

下一步是将PV加入到原有VG中

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[root@localhost ~]# vgextend VolGroup /dev/sdb1   Volume group "VolGroup" successfully extended [root@localhost ~]# vgdisplay   --- Volume group ---   VG Name               VolGroup   System ID               Format                lvm2   Metadata Areas        2   Metadata Sequence No  10   VG Access             read/write   VG Status             resizable   MAX LV                0   Cur LV                3   Open LV               3   Max PV                0   Cur PV                2   Act PV                2   VG Size               334.86 GiB   PE Size               4.00 MiB   Total PE              85725   Alloc PE / Size       28378 / 110.85 GiB   Free  PE / Size       57347 / 224.01 GiB

VG Size已经改变

调整LV的空间  

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[root@localhost ~]# lvextend -L +220G /dev/VolGroup/lv_root Extending logical volume lv_root to 313.00 GiB Logical volume lv_root successfully resized [root@localhost ~]# df -h 文件系统          容量  已用  可用 已用%% 挂载点 /dev/mapper/VolGroup-lv_root                        92G   61G   27G  70% / tmpfs                 7.8G   88K  7.8G   1% /dev/shm /dev/sda1             485M   32M  428M   7% /boot

可以看到调整后并没有马上增加，需要resize2fs

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[root@localhost ~]# resize2fs -p /dev/VolGroup/lv_root resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/VolGroup/lv_root is mounted on /; on-line resizing required old desc_blocks = 6, new_desc_blocks = 20 Performing an on-line resize of /dev/VolGroup/lv_root to 82051072 (4k) blocks. The filesystem on /dev/VolGroup/lv_root is now 82051072 blocks long.

再次查看，已经成功显示。

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[root@localhost ~]# df -h 文件系统          容量  已用  可用 已用%% 挂载点 /dev/mapper/VolGroup-lv_root                       309G   61G  233G  21% / tmpfs                 7.8G   88K  7.8G   1% /dev/shm /dev/sda1             485M   32M  428M   7% /boot

done!

如果上文中的PV VG LV  等概念、命令不清楚，建议先看看LVM的基础知识再操作。