[root@MSLINUX ~]# df
将sdb划9G给根目录使用：
文件系统 1K-块 已用 可用 已用% 挂载点
/dev/mapper/vg_mslinux-lv_root 16134560 6843500 8471452 45% /
tmpfs 1955576 72 1955504 1% /dev/shm
/dev/sda1 495844 37797 432447 9% /boot
//193.168.120.3/e$ 51207152 18612592 32594560 37% /shared
[root@MSLINUX ~]# fdisk -l
Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 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: 0x000d8e9e
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 2611 20458496 8e Linux LVM
Disk /dev/sdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 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/vg_mslinux-lv_root: 16.8 GB, 16785604608 bytes
255 heads, 63 sectors/track, 2040 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/vg_mslinux-lv_swap: 4160 MB, 4160749568 bytes
255 heads, 63 sectors/track, 505 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
[root@MSLINUX ~]# fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0xdc6052f1.
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: 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
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-2610, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-2610, default 2610): +10G
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@MSLINUX ~]# lvdisplay
--- Logical volume ---
LV Path /dev/vg_mslinux/lv_root
LV Name lv_root
VG Name vg_mslinux
LV UUID rmUL10-kznP-SNeL-WtlO-sefO-pl26-YtGhGX
LV Write Access read/write
LV Creation host, time MSLINUX, 2016-12-13 19:17:00 +0800
LV Status available
# open 1
LV Size 15.63 GiB
Current LE 4002
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Path /dev/vg_mslinux/lv_swap
LV Name lv_swap
VG Name vg_mslinux
LV UUID gocgis-2vvH-0gOF-qmLC-dlYW-A3x3-HOFg4b
LV Write Access read/write
LV Creation host, time MSLINUX, 2016-12-13 19:17:09 +0800
LV Status available
# open 1
LV Size 3.88 GiB
Current LE 992
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
[root@MSLINUX ~]# vgextend vg_mslinux /dev/sdb1
No physical volume label read from /dev/sdb1
Physical volume "/dev/sdb1" successfully created
Volume group "vg_mslinux" successfully extended
You have new mail in /var/spool/mail/root
[root@MSLINUX ~]# lvextend -L +9000M /dev/vg_mslinux/lv_root
Extending logical volume lv_root to 24.42 GiB
Logical volume lv_root successfully resized
[root@MSLINUX ~]# resize2fs -p /dev/vg_mslinux/lv_root
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/vg_mslinux/lv_root is mounted on /; on-line resizing required
old desc_blocks = 1, new_desc_blocks = 2
Performing an on-line resize of /dev/vg_mslinux/lv_root to 6402048 (4k) blocks.
The filesystem on /dev/vg_mslinux/lv_root is now 6402048 blocks long.
[root@MSLINUX ~]# df
文件系统 1K-块 已用 可用 已用% 挂载点
/dev/mapper/vg_mslinux-lv_root
25207436 6846512 17086772 29% /
tmpfs 1955576 72 1955504 1% /dev/shm
/dev/sda1 495844 37797 432447 9% /boot
//193.168.120.3/e$ 51207152 18612592 32594560 37% /shared