CentOS扩展分区大小

login as: root
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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 [email protected]
        (/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