[root@localhost?~]#?df?-h

Filesystem?Size?Used?Avail?Use%?Mounted?on

/dev/mapper/VolGroup-lv_root?50G?47G?16M?100%?/???//lv_root滿了

tmpfs?1.9G?72K?1.9G?1%?/dev/shm

/dev/sda1?485M?40M?420M?9%?/boot

/dev/mapper/VolGroup-lv_home?406G?19G?366G?5%?/home???//lv_home空間很多

[root@localhost?~]#?resize2fs?-p?/dev/mapper/VolGroup-lv_home?100G

resize2fs?1.41.12?(17-May-2010)

Filesystem?at?/dev/mapper/VolGroup-lv_home?is?mounted?on?/home;?on-line?resizing?required

On-line?shrinking?from?107865088?to?65536000?not?supported.????//先umount才能resize2fs

[root@localhost?~]#?umount?/home???//umount?home目錄

[root@localhost?~]#?resize2fs?-p?/dev/mapper/VolGroup-lv_home?100G

resize2fs?1.41.12?(17-May-2010)

請先運行?'e2fsck?-f?/dev/mapper/VolGroup-lv_home'.//提示要先進行磁盤檢測

[root@localhost?~]#?e2fsck?-f?/dev/mapper/VolGroup-lv_home

e2fsck?1.41.12?(17-May-2010)

第一步:?檢查inode,塊,和大小

第二步:?檢查目錄結構

第3步:?檢查目錄連接性

Pass?4:?Checking?reference?counts

第5步:?檢查簇概要信息

/dev/mapper/VolGroup-lv_home:?1459/16384000?files?(4.0%?non-contiguous),?5914204/65536000?blocks

[root@localhost?~]#?resize2fs?-p?/dev/mapper/VolGroup-lv_home?100G????//重定大小

resize2fs?1.41.12?(17-May-2010)

Resizing?the?filesystem?on?/dev/mapper/VolGroup-lv_home?to?26214400?(4k)?blocks.

Begin?pass?2?(max?=?32768)

正在重定位塊?XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Begin?pass?3?(max?=?2000)

正在掃描inode表?XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

The?filesystem?on?/dev/mapper/VolGroup-lv_home?is?now?26214400?blocks?long.

[root@localhost?~]#?mount?/home/

[root@localhost?~]#?df?-h

Filesystem?Size?Used?Avail?Use%?Mounted?on

/dev/mapper/VolGroup-lv_root?50G?47G?16M?100%?/

tmpfs?1.9G?72K?1.9G?1%?/dev/shm

/dev/sda1?485M?40M?420M?9%?/boot

/dev/mapper/VolGroup-lv_home?99G?19G?75G?20%?/home

[root@localhost?~]#?lvreduce?-L?100G?/dev/mapper/VolGroup-lv_home???//釋放空間

WARNING:?Reducing?active?andopen?logical?volume?to?100.00?GiB

THIS?MAY?DESTROY?YOUR?DATA?(filesystem?etc.)

Do?you?really?want?to?reduce?lv_home??[y/n]:?y

Reducing?logical?volume?lv_home?to?100.00?GiB

Logical?volume?lv_home?successfully?resized

[root@localhost?~]#?df?-h

Filesystem?Size?Used?Avail?Use%?Mounted?on

/dev/mapper/VolGroup-lv_root?50G?47G?16M?100%?/

tmpfs?1.9G?72K?1.9G?1%?/dev/shm

/dev/sda1?485M?40M?420M?9%?/boot

/dev/mapper/VolGroup-lv_home?99G?19G?75G?20%?/home

[root@localhost?~]#?vgdisplay

---?Volume?group?---

VG?Name?VolGroup

System?ID

Format?lvm2

Metadata?Areas?1

Metadata?Sequence?No?5

VG?Access?read/write

VG?Status?resizable

MAX?LV?0

Cur?LV?3

Open?LV?3

Max?PV?0

Cur?PV?1

Act?PV?1

VG?Size?465.27?GiB

PE?Size?4.00?MiB

Total?PE?119109

Alloc?PE?/?Size?39372?/?153.80?GiB

Free?PE?/?Size?79737?/?311.47?GiB???????//空閑空間

VG?UUID?Vt2V4t-Byxs-tQqk-cY0h-IDE3-pabX-LUfkRS

[root@localhost?~]#?lvextend?-L?+311.47G?/dev/mapper/VolGroup-lv_root???//空閑空間加入到lv_root

Rounding?size?to?boundary?between?physical?extents:?311.47?GiB

Extending?logical?volume?lv_root?to?361.47?GiB

Logical?volume?lv_root?successfully?resized

[root@localhost?~]#?resize2fs?-p?/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?=?4,?new_desc_blocks?=?23????//這兒要耐心等待，擴大越多，時間越長

Performing?an?on-line?resize?of?/dev/mapper/VolGroup-lv_root?to?94757888?(4k)?blocks.

The?filesystem?on?/dev/mapper/VolGroup-lv_root?is?now?94757888?blocks?long.

[root@localhost?openfire]#?df?-h

Filesystem?Size?Used?Avail?Use%?Mounted?on

/dev/mapper/VolGroup-lv_root?356G?48G?308G?14%?/

tmpfs?1.9G?72K?1.9G?1%?/dev/shm

/dev/sda1?485M?40M?420M?9%?/boot

/dev/mapper/VolGroup-lv_home?99G?19G?75G?20%?/home

總結

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