爲OpenStack創建volume group

打算將分區/dev/sdb3創建vg, 步驟是：

1. 用/dev/sdb3創建pv

2. 使用上面的pv創建vg

但是現有的system 不是linux LVM類型，需要通過fdisk修改ID 爲8e

/dev/sdb3           13105       36947   191509504    7  HPFS/NTFS

[root@pangpangs ~]# fdisk  /dev/sdb3

p(查看當前分區)

t(修改系統ID)

3(第三塊)

8e(修改類型)

w(保存)

[root@pangpangs ~]# fdisk -l
.....

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1       13105   105263104    7  HPFS/NTFS
/dev/sdb2           13105       36947   191509504    7  HPFS/NTFS
/dev/sdb3           36947       60802   191611904   8e  Linux LVM
....

無法創建pv，可能是之前被掛載過

[root@pangpangs ~]# pvcreate /dev/sdb3
  Can't open /dev/sdb3 exclusively.  Mounted filesystem?

[root@pangpangs ~]# df -h
文件系統              容量  已用  可用 已用%% 掛載點
....

/dev/sdb3             180G  188M  171G   1% /mnt/disk3

卸載/dev/sdb3

[root@pangpangs ~]# umount -v /dev/sdb3

/dev/sdb3 umounted

成功創建pv

[root@pangpangs ~]# pvcreate /dev/sdb3
  Physical volume "/dev/sdb3" successfully created
[root@pangpangs ~]# pvscan
  PV /dev/sda2   VG vg_pangpangs    lvm2 [931.02 GiB / 0    free]
  PV /dev/sdb3                      lvm2 [182.74 GiB]
  Total: 2 [1.09 TiB] / in use: 1 [931.02 GiB] / in no VG: 1 [182.74 GiB】

成功創建vg

【root@pangpangs ~]# vgcreate cinder-volumes /dev/sdb3
  Volume group "cinder-volumes" successfully created

[root@pangpangs ~]# vgdisplay
  --- Volume group ---
  VG Name               cinder-volumes
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  1
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                0
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               182.73 GiB
  PE Size               4.00 MiB
  Total PE              46780
  Alloc PE / Size       0 / 0
  Free  PE / Size       46780 / 182.73 GiB
  VG UUID               qoV4Yf-3iZZ-DorA-SAus-1b0E-OCf2-KHK6Nt

df 和 fdisk命令

xianghui@xianghui:~$ sudo fdisk -l

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0xaf3788b6

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048   106498047    53248000    7  HPFS/NTFS/exFAT
/dev/sda2       106498048   498690047   196096000   83  Linux
/dev/sda3       498690048   890879999   196094976   82  Linux swap / Solaris
/dev/sda4       890884094  1953521663   531318785    f  W95 Ext'd (LBA)
Partition 4 does not start on physical sector boundary.
/dev/sda5       890884096  1953521663   531318784    7  HPFS/NTFS/exFAT
xianghui@xianghui:~$ sudo fdisk -l /dev/sda2

Disk /dev/sda2: 200.8 GB, 200802304000 bytes
255 heads, 63 sectors/track, 24412 cylinders, total 392192000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

Disk /dev/sda2 doesn't contain a valid partition table
xianghui@xianghui:~$ sudo df -lh
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda2       184G   30G  146G  17% /
none            4.0K     0  4.0K   0% /sys/fs/cgroup
udev            3.8G  4.0K  3.8G   1% /dev
tmpfs           779M  1.3M  777M   1% /run
none            5.0M     0  5.0M   0% /run/lock
none            3.8G  588K  3.8G   1% /run/shm
none            100M   32K  100M   1% /run/user

參考 http://book.51cto.com/art/201012/240911.htm

http://blog.csdn.net/aaronychen/article/details/2270048

http://blog.csdn.net/dlodj/article/details/6672357