linux 硬盘分区扩容

时间:2014-12-30 13:36 来源:linux.it.net.cn 作者:IT

记一下记录，忘了好找

某服务器硬盘没划分完，某个分区相当小，很浪费

[root@svr68 ~]# vgdisplay

--- Volume group ---

VG Name VolGroup00

System ID

Format lvm2

Metadata Areas 2

Metadata Sequence No 11

VG Access read/write

VG Status resizable

MAX LV 0

Cur LV 6

Open LV 5

Max PV 0

Cur PV 2

Act PV 2

VG Size 836.34 GB

PE Size 32.00 MB

Total PE 26763

Alloc PE / Size 18238 / 569.94 GB

Free PE / Size 8525 / 266.41 GB

VG UUID GQxsHi-QnFz-54YO-Htzs-jwBp-n7t5-DoEv8R

###可以看到有266G的空闲空间

[root@svr68 ~]# df -h

文件系统容量已用可用已用% 挂载点

/dev/mapper/VolGroup00-LogVol00

3.9G 477M 3.3G 13% /

/dev/mapper/VolGroup00-LogVol05

252G 2.7G 239G 2% /home

/dev/mapper/VolGroup00-LogVol04

3.9G 730M 3.0G 20% /var

/dev/mapper/VolGroup00-LogVol03

35G 221M 33G 1% /tmp

/dev/mapper/VolGroup00-LogVol02

256G 9.5G 234G 4% /usr

/dev/sda3 190M 15M 166M 9% /boot

tmpfs 7.9G 0 7.9G 0% /dev/shm

### 目标是/home目录，准备扩它。其他也可以扩，看自己需要。

[root@svr68 ~]# umount /dev/mapper/VolGroup00-LogVol05

umount: /home: device is busy

###卸载home目录所在逻辑卷，但是有进程在用

[root@svr68 ~]# fuser -m /dev/mapper/VolGroup00-LogVol05

/dev/mapper/VolGroup00-LogVol05: 4996c 4997c

###看谁在用它

[root@btirsvr68 ~]# kill 4996 4997

-bash: kill: (22338) - 没有那个进程

-bash: kill: (22340) - 没有那个进程

###干掉

[root@svr68 ~]# fuser -m /dev/mapper/VolGroup00-LogVol05

### 嗯，没了

[root@svr68 ~]# umount /dev/mapper/VolGroup00-LogVol05

###这下卸载了

[root@svr68 ~]# lvextend -l +8525 /dev/VolGroup00/LogVol05

Extending logical volume LogVol05 to 526.41 GB

Logical volume LogVol05 successfully resized

###扩展8525个单位，从vgdisplay看到的最大了。也可以用-L 参数扩充具体的大小如lvextend -L+266G /dev/VolGroup00/LogVol05

[root@svr68 ~]# resize2fs /dev/VolGroup00/LogVol05

resize2fs 1.39 (29-May-2006)

Please run 'e2fsck -f /dev/VolGroup00/LogVol05' first.

###挂在钱要重新改变尺寸才真正生效，噢，碰到一个问题，要先检查一下磁盘。

[root@svr68 ~]# e2fsck -f /dev/VolGroup00/LogVol05

e2fsck 1.39 (29-May-2006)

Pass 1: Checking inodes, blocks, and sizes

Pass 2: Checking directory structure

Pass 3: Checking directory connectivity

Pass 4: Checking reference counts

Pass 5: Checking group summary information

/dev/VolGroup00/LogVol05: 30956/68157440 files (0.8% non-contiguous), 2819130/68157440 blocks

###查吧，花点时间而已，约1分钟

[root@btirsvr68 ~]# resize2fs /dev/VolGroup00/LogVol05

resize2fs 1.39 (29-May-2006)

Resizing the filesystem on /dev/VolGroup00/LogVol05 to 137994240 (4k) blocks.

The filesystem on /dev/VolGroup00/LogVol05 is now 137994240 blocks long.

###改大小成功

[root@btirsvr68 ~]# mount /dev/VolGroup00/LogVol05

###挂上啦

[root@btirsvr68 ~]# df -h