linux服务器磁盘空间扩充方法

[root@localhost indices]# fdisk /dev/sdc
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x5799aeba.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

WARNING: The size of this disk is 2.2 TB (2199023255552 bytes).
DOS partition table format can not be used on drives for volumes
larger than (2199023255040 bytes) for 512-byte sectors. Use parted(1) and GUID 
partition table format (GPT).


WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

Command (m for help): n #new 新分区
Command action
   e   extended
   p   primary partition (1-4)
p #选择主扇区
Partition number (1-4): 1 #起始扇区
First cylinder (1-267349, default 1):  #这里直接回车表示取默认值1
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-267349, default 267349):   #这里由于es需要的存储空间比较大，所以2个T的空间我都加上了，正常可以按照需求修改扇区大小
Using default value 267349

Command (m for help): w #保存退出
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

[root@localhost indices]# pvcreate /dev/sdc1
  Physical volume "/dev/sdc1" successfully created

[root@localhost indices]# vgscan
  Reading all physical volumes.  This may take a while...
  Found volume group "VolGroup" using metadata type lvm2
  #这里物理卷组名称为VolGroup

[root@localhost indices]# vgextend VolGroup /dev/sdc1
  Volume group "VolGroup" successfully extended

[root@localhost indices]# lvextend -L +2048G /dev/mapper/VolGroup-lv_root
  Size of logical volume VolGroup/lv_root changed from 135.47 GiB (34681 extents) to 2.13 TiB (558848 extents).
  Logical volume lv_root successfully resized.

[root@localhost indices]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
                      134G  119G  8.4G  94% /
tmpfs                  32G   72K   32G   1% /dev/shm
/dev/sda1             477M   41M  411M  10% /boot

[root@localhost indices]# resize2fs -f /dev/mapper/VolGroup-lv_root
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/mapper/VolGroup-lv_root is mounted on /; on-line resizing required
old desc_blocks = 9, new_desc_blocks = 137
Performing an on-line resize of /dev/mapper/VolGroup-lv_root to 572260352 (4k) blocks.
The filesystem on /dev/mapper/VolGroup-lv_root is now 572260352 blocks long.

[root@localhost indices]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
                      2.1T  125G  1.9T   7% /
tmpfs                  32G   72K   32G   1% /dev/shm
/dev/sda1             477M   41M  411M  10% /boot