Linux环境:

virtual box 下,redhat5 64位版本,原来系统默认分区.

新添加一个8G的硬盘sdb,将新加的硬盘容量扩充到原来的/上去.

1.分区,

[root@test ~]# fdisk -l

Disk /dev/sda: 8589 MB, 8589934592 bytes

255 heads, 63 sectors/track, 1044 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *           1          13      104391   83  Linux

/dev/sda2              14        1044     8281507+  8e  Linux LVM

Disk /dev/sdb: 8589 MB, 8589934592 bytes

255 heads, 63 sectors/track, 1044 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdb doesn't contain a valid partition table

[root@test ~]# fdisk /dev/sdb

-----此处有一段英文省略

Command (m for help): n（输入n）

Command action

   e   extended

   p   primary partition (1-4)

p（输入p）

Partition number (1-4): 1 （输入1）

First cylinder (1-1044, default 1): (回车）

Using default value 1

Last cylinder or +size or +sizeM or +sizeK (1-1044, default 1044): （回车）

Using default value 1044

Command (m for help): w（输入w）

w保存退出！

2.创建pv

[root@test ~]# pvcreate /dev/sdb1

  Physical volume "/dev/sdb1" successfully created

查看pv

root@test ~]# pvdisplay

  /dev/hdc: open failed: No medium found

  --- Physical volume ---

  PV Name               /dev/sda2

  VG Name               VolGroup00

  PV Size               7.90 GB / not usable 23.41 MB

  Allocatable           yes (but full)

  PE Size (KByte)       32768

  Total PE              252

  Free PE               0

  Allocated PE          252

  PV UUID               ntpCtU-7gX3-988d-ifQv-SCyb-oFcx-S0jFrM

  "/dev/sdb1" is a new physical volume of "8.00 GB"

  --- NEW Physical volume ---

  PV Name               /dev/sdb1

  VG Name               

  PV Size               8.00 GB

  Allocatable           NO

  PE Size (KByte)       0

  Total PE              0

  Free PE               0

  Allocated PE          0

  PV UUID               2XiyBc-5hJD-LJDQ-Fslo-t3CD-go4j-Zt8nxO

3.查看vg

vgdisplay

  /dev/hdc: open failed: No medium found

  --- Volume group ---

  VG Name               VolGroup00

  System ID             

  Format                lvm2

  Metadata Areas        1

  Metadata Sequence No  3

  VG Access             read/write

  VG Status             resizable

  MAX LV                0

  Cur LV                2

  Open LV               2

  Max PV                0

  Cur PV                1

  Act PV                1

  VG Size               7.88 GB

  PE Size               32.00 MB

  Total PE              252

  Alloc PE / Size       252 / 7.88 GB

  Free  PE / Size       0 / 0   

  VG UUID               Mjkp7h-lSOy-qR7r-RQ1b-FRrH-rNjQ-BOJYDY

4.扩容vg

[root@test ~]# vgextend VolGroup00 /dev/sdb1

  /dev/hdc: open failed: No medium found

  Volume group "VolGroup00" successfully extended

5.检查vg

[root@test ~]# vgdisplay

  /dev/hdc: open failed: No medium found

  --- Volume group ---

  VG Name               VolGroup00

  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               15.84 GB

  PE Size               32.00 MB

  Total PE              507

  Alloc PE / Size       252 / 7.88 GB

  Free  PE / Size       255 / 7.97 GB

  VG UUID               Mjkp7h-lSOy-qR7r-RQ1b-FRrH-rNjQ-BOJYDY

6.查看lv

[root@test ~]# lvdisplay

  /dev/hdc: open failed: No medium found

  --- Logical volume ---

  LV Name                /dev/VolGroup00/LogVol00

  VG Name                VolGroup00

  LV UUID                KBRr5T-kBNg-UfqY-5kEE-snsd-eKl3-1dtUT9

  LV Write Access        read/write

  LV Status              available

  # open                 1

  LV Size                6.88 GB

  Current LE             220

  Segments               1

  Allocation             inherit

  Read ahead sectors     auto

  - currently set to     256

  Block device           253:0

  --- Logical volume ---

  LV Name                /dev/VolGroup00/LogVol01

  VG Name                VolGroup00

  LV UUID                YMu5P9-nuwE-GbD6-9T9P-knzk-H1rQ-ccyzYX

  LV Write Access        read/write

  LV Status              available

  # open                 1

  LV Size                1.00 GB

  Current LE             32

  Segments               1

  Allocation             inherit

  Read ahead sectors     auto

  - currently set to     256

  Block device           253:1

7.扩容lv

[root@test ~]# lvextend /dev/VolGroup00/LogVol00 /dev/sdb1

  /dev/hdc: open failed: No medium found

  Extending logical volume LogVol00 to 14.84 GB

  Logical volume LogVol00 successfully resized

8.查看lv

[root@test ~]# lvdisplay

  /dev/hdc: open failed: No medium found

  --- Logical volume ---

  LV Name                /dev/VolGroup00/LogVol00

  VG Name                VolGroup00

  LV UUID                KBRr5T-kBNg-UfqY-5kEE-snsd-eKl3-1dtUT9

  LV Write Access        read/write

  LV Status              available

  # open                 1

  LV Size                14.84 GB

  Current LE             475

  Segments               2

  Allocation             inherit

  Read ahead sectors     auto

  - currently set to     256

  Block device           253:0

  --- Logical volume ---

  LV Name                /dev/VolGroup00/LogVol01

  VG Name                VolGroup00

  LV UUID                YMu5P9-nuwE-GbD6-9T9P-knzk-H1rQ-ccyzYX

  LV Write Access        read/write

  LV Status              available

  # open                 1

  LV Size                1.00 GB

  Current LE             32

  Segments               1

  Allocation             inherit

  Read ahead sectors     auto

  - currently set to     256

  Block device           253:1

9.扩容 /  磁盘空间

[root@test ~]# mount

/dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw)

proc on /proc type proc (rw)

sysfs on /sys type sysfs (rw)

devpts on /dev/pts type devpts (rw,gid=5,mode=620)

/dev/sda1 on /boot type ext3 (rw)

tmpfs on /dev/shm type tmpfs (rw)

none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)

sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)

[root@test ~]# res

reset           resize          reslisa         restorecon      restore.static  

resetall        resize2fs       restore         restorecond     

[root@test ~]# resize2fs /dev/mapper/VolGroup00-LogVol0

VolGroup00-LogVol00  VolGroup00-LogVol01  

[root@test ~]# resize2fs /dev/mapper/VolGroup00-LogVol00

resize2fs 1.39 (29-May-2006)

Filesystem at /dev/mapper/VolGroup00-LogVol00 is mounted on /; on-line resizing required

Performing an on-line resize of /dev/mapper/VolGroup00-LogVol00 to 3891200 (4k) blocks.

The filesystem on /dev/mapper/VolGroup00-LogVol00 is now 3891200 blocks long.

[root@test ~]# df -h

Filesystem            Size  Used Avail Use% Mounted on

/dev/mapper/VolGroup00-LogVol00

                       15G  6.2G  7.5G  46% /

/dev/sda1              99M   13M   82M  14% /boot

tmpfs                 250M     0  250M   0% /dev/shm

磁盘空间添加完成