LINUX下为LVM磁盘增加硬盘空间
1，为客户机增加一块新的硬盘
2， 重启客户机
3， 用fdisk -l查看整个磁盘空间
#fdisk -l Disk /dev/sda: 34.4 GB, 34359738368 bytes 255 heads, 63 sectors/track, 4177 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000b2d34 Device Boot Start End Blocks Id System /dev/sda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 64 4178 33041408 8e Linux LVM Disk /dev/sdb: 214.7 GB, 214748364800 bytes //新加的盘硬盘 255 heads, 63 sectors/track, 26108 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/VolGroup-lv_root: 30.4 GB, 30396121088 bytes 255 heads, 63 sectors/track, 3695 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/VolGroup-lv_swap: 3435 MB, 3435134976 bytes 255 heads, 63 sectors/track, 417 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
4， 用pvcreate /dev/sdb将新的硬盘加入物理卷
pvcreate /dev/sdb Physical volume “/dev/sdb” successfully created
5， 用vgextend VolGroup /dev/sdb将新硬盘加入卷组
vgextend VolGroup /dev/sdb Volume group “VolGroup” successfully extended
6， 为根分区扩散空间lvextend -L +200G /dev/mapper/VolGroup-lv_root
lvextend -L +180G /dev/mapper/VolGroup-lv_root //加180G lvextend -l +100%FREE /dev/VolGroup-lv_root //加全部 控制台显示信息： Extending logical volume lv_root to 208.31 GiB Logical volume lv_root successfully resized
7， 将之应用resize2fs /dev/VolGroup/lv_root
resize2fs /dev/VolGroup/lv_root 注意：centos7使用：xfs_growfs /dev/VolGroup/lv_root 控制台显示信息: resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/VolGroup/lv_root is mounted on /; on-line resizing required old desc_blocks = 2, new_desc_blocks = 14 Performing an on-line resize of /dev/VolGroup/lv_root to 54606848 (4k) blocks. The filesystem on /dev/VolGroup/lv_root is now 54606848 blocks long.
8， 再用df -hT查看空间，已加入
Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root 206G 5.7G 189G 3% / tmpfs 1.9G 0 1.9G 0% /dev/shm /dev/sda1 485M 32M 428M 7% /boot
