CentOS扩展分区大小

login as: root
Access denied
root@10.10.9.244's password:
Last login: Sat Jul  9 07:12:29 2016 from 10.30.31.110
[root@localhost ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
26G   20G  5.5G  78% /
tmpfs                 5.9G   72K  5.9G   1% /dev/shm
/dev/sda1             477M   68M  385M  15% /boot
[root@localhost ~]# fdisk -l

Disk /dev/sda: 107.4 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 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: 0x00037586

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        3917    30944256   8e  Linux LVM

Disk /dev/mapper/VolGroup-lv_root: 28.5 GB, 28462546944 bytes
255 heads, 63 sectors/track, 3460 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: 3221 MB, 3221225472 bytes
255 heads, 63 sectors/track, 391 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@localhost ~]# lvdisplay
--- Logical volume ---
LV Path                /dev/VolGroup/lv_root
LV Name                lv_root
VG Name                VolGroup
LV UUID                S8KICb-emT1-PtqH-Fhgc-szCl-7lRd-tq26hj
LV Write Access        read/write
LV Creation host, time localhost.localdomain, 2016-01-25 13:04:50 +0800
LV Status              available
# open                 1
LV Size                26.51 GiB
Current LE             6786
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           253:0

--- Logical volume ---
LV Path                /dev/VolGroup/lv_swap
LV Name                lv_swap
VG Name                VolGroup
LV UUID                tagUGp-5vNM-bR70-caqo-r5rb-fE0M-ZfeqY6
LV Write Access        read/write
LV Creation host, time localhost.localdomain, 2016-01-25 13:04:54 +0800
LV Status              available
# open                 1
LV Size                3.00 GiB
Current LE             768
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           253:1

[root@localhost ~]# fdisk /dev/sda

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): m
Command action
a   toggle a bootable flag
b   edit bsd disklabel
c   toggle the dos compatibility flag
d   delete a partition
l   list known partition types
m   print this menu
n   add a new partition
o   create a new empty DOS partition table
p   print the partition table
q   quit without saving changes
s   create a new empty Sun disklabel
t   change a partition's system id
u   change display/entry units
v   verify the partition table
w   write table to disk and exit
x   extra functionality (experts only)

Command (m for help): n
Command action
e   extended
p   primary partition (1-4)
p
Partition number (1-4): 4
First cylinder (3917-13054, default 3917):
Using default value 3917
Last cylinder, +cylinders or +size{K,M,G} (3917-13054, default 13054):
Using default value 13054

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
[root@localhost ~]#

[root@localhost ~]# reboot

Broadcast message from root@localhost.localdomain
(/dev/pts/0) at 8:27 ...

The system is going down for reboot NOW!

[root@localhost ~]# mkfs -t ext4 /dev/sda4
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
4587520 inodes, 18349743 blocks
917487 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
560 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424

Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 39 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.
[root@localhost ~]# pvcreate /dev/sda4
Physical volume "/dev/sda4" successfully created
[root@localhost ~]# vgextend /dev/mapper/VolGroup  /dev/sda4
Volume group "VolGroup" successfully extended
[root@localhost ~]# vgdisplay
--- Volume group ---
VG Name               VolGroup
System ID
Format                lvm2
Metadata Areas        2
Metadata Sequence No  4
VG Access             read/write
VG Status             resizable
MAX LV                0
Cur LV                2
Open LV               2
Max PV                0
Cur PV                2
Act PV                2
VG Size               99.50 GiB
PE Size               4.00 MiB
Total PE              25473
Alloc PE / Size       7554 / 29.51 GiB
Free  PE / Size       17919 / 70.00 GiB
VG UUID               xFBNk3-FQKV-KVLP-vnon-gA0Y-ouVV-MqBbkO

[root@localhost ~]# lvextend -L +69.9G /dev/mapper/VolGroup-lv_root  /dev/sda4
Rounding size to boundary between physical extents: 69.90 GiB
Size of logical volume VolGroup/lv_root changed from 26.51 GiB (6786 extents) to 96.41 GiB (24681 extents).
Logical volume lv_root successfully resized
[root@localhost ~]# resize2fs /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 = 2, new_desc_blocks = 7
Performing an on-line resize of /dev/mapper/VolGroup-lv_root to 25273344 (4k) blocks.
The filesystem on /dev/mapper/VolGroup-lv_root is now 25273344 blocks long.

[root@localhost ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
95G   20G   71G  22% /
tmpfs                 5.9G   72K  5.9G   1% /dev/shm
/dev/sda1             477M   68M  385M  15% /boot