LVM扩容/卷删除

[root@localhost Desktop]# vgdisplay

  --- Volume group ---

  VG Name               vg1

  System ID            

  Format                lvm2

  Metadata Areas        3

  Metadata Sequence No  3

  VG Access             read/write

  VG Status             resizable

  MAX LV                0

  Cur LV                1

  Open LV               1

  Max PV                0

  Cur PV                3

  Act PV                3

  VG Size               0.40 GiB

  PE Size               4.00 MiB

  Total PE              614

  Alloc PE / Size       50 / 200.00 MiB

  Free  PE / Size       564 / 2.20 GiB

  VG UUID               Fmf8tO-TdiW-U3nB-ug0G-ny8x-eZHG-a50dWE

在原本的400M空间上+2G

[root@localhost Desktop]# pvcreate /dev/sdc

  Writing physical volume data to disk "/dev/sdc"

  Physical volume "/dev/sdc" successfully created

 vgextend vg1 /dev/sdc      ---------将/dev/sdc 加入vg1组

  Volume group "vg1" successfully extended

一下就给/dev/vg1/lv1 +上1G大小

lvextend

lvextend -L +1G /dev/vg1/lv1

Extending logical volume lv1 to 1.20 GiB

Logical volume lv1 successfully resized

--- Logical volume ---

  LV Path                /dev/vg1/lv1

  LV Name                lv1

  VG Name                vg1

  LV UUID                eysn8s-IYuT-QImT-agV1-ZHFJ-IJDG-jMrnG9

  LV Write Access        read/write

  LV Creation host, time localhost.localdomain, 2014-11-08 01:39:45 -0800

  LV Status              available

  # open                 1

  LV Size                1.20 GiB

  Current LE             306

  Segments               2

  Allocation             inherit

  Read ahead sectors     auto

  - currently set to     256

  Block device           253:0

 

-----删除lv

 如果挂载了 先将它umount

umount /dev/mapper/vg1-lv1

[root@localhost Desktop]# lvremove /dev/vg1/lv1

Do you really want to remove active logical volume lv1? [y/n]: y

  Logical volume "lv1" successfully removed

--删除vg

[root@localhost Desktop]# vgremove /dev/vg1

  Volume group "vg1" successfully removed

--删除pv

[root@localhost Desktop]# pvscan

  PV /dev/sdb1                      lvm2 [109.79 MiB]

  PV /dev/sdb2                      lvm2 [305.93 MiB]

  PV /dev/sdc                       lvm2 [2.00 GiB

[root@localhost Desktop]# pvremove /dev/sdb1

  Labels on physical volume "/dev/sdb1" successfully wiped

 [root@localhost Desktop]# pvscan

  PV /dev/sdb2                      lvm2 [305.93 MiB]

  PV /dev/sdc                       lvm2 [2.00 GiB]

  Total: 2 [2.30 GiB] / in use: 0 [0   ] / in no VG: 2 [2.30 GiB]