为OpenStack创建volume group

打算将分区/dev/sdb3创建vg, 步骤是：

1. 用/dev/sdb3创建pv

2. 使用上面的pv创建vg

但是现有的system 不是linux LVM类型，需要通过fdisk修改ID 为8e

/dev/sdb3           13105       36947   191509504    7  HPFS/NTFS

[root@pangpangs ~]# fdisk  /dev/sdb3p(查看当前分区)t(修改系统ID)3(第三块)8e(修改类型)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....

无法创建pv，可能是之前被挂载过

[root@pangpangs ~]# pvcreate /dev/sdb3  Can't open /dev/sdb3 exclusively.  Mounted filesystem?[root@pangpangs ~]# df -h文件系统              容量  已用  可用 已用%% 挂载点..../dev/sdb3             180G  188M  171G   1% /mnt/disk3

卸载/dev/sdb3

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

成功创建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】

成功创建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 -lDisk /dev/sda: 1000.2 GB, 1000204886016 bytes255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 4096 bytesI/O size (minimum/optimal): 4096 bytes / 4096 bytesDisk 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/exFATxianghui@xianghui:~$ sudo fdisk -l /dev/sda2Disk /dev/sda2: 200.8 GB, 200802304000 bytes255 heads, 63 sectors/track, 24412 cylinders, total 392192000 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 4096 bytesI/O size (minimum/optimal): 4096 bytes / 4096 bytesDisk identifier: 0x00000000Disk /dev/sda2 doesn't contain a valid partition tablexianghui@xianghui:~$ sudo df -lhFilesystem      Size  Used Avail Use% Mounted on/dev/sda2       184G   30G  146G  17% /none            4.0K     0  4.0K   0% /sys/fs/cgroupudev            3.8G  4.0K  3.8G   1% /devtmpfs           779M  1.3M  777M   1% /runnone            5.0M     0  5.0M   0% /run/locknone            3.8G  588K  3.8G   1% /run/shmnone            100M   32K  100M   1% /run/user

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

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

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