linux创建物理卷、卷组、逻辑卷以及格式化、挂载。

[root@centos ~]# fdisk /dev/sdb                                 #创建3主分区，每个区5G Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them. Be careful before using the write command.

Device does not contain a recognized partition table Building a new DOS disklabel with disk identifier 0x29162724.

Command (m for help): n Partition type:    p   primary (0 primary, 0 extended, 4 free)    e   extended Select (default p): p Partition number (1-4, default 1): 1 First sector (2048-41943039, default 2048):  Using default value 2048 Last sector, +sectors or +size{K,M,G} (2048-41943039, default 41943039): +5G Partition 1 of type Linux and of size 5 GiB is set

Command (m for help): n Partition type:    p   primary (1 primary, 0 extended, 3 free)    e   extended Select (default p): p Partition number (2-4, default 2): 2 First sector (10487808-41943039, default 10487808):  Using default value 10487808 Last sector, +sectors or +size{K,M,G} (10487808-41943039, default 41943039): +5G Partition 2 of type Linux and of size 5 GiB is set

Command (m for help): n Partition type:    p   primary (2 primary, 0 extended, 2 free)    e   extended Select (default p): p Partition number (3,4, default 3): 3 First sector (20973568-41943039, default 20973568):  Using default value 20973568 Last sector, +sectors or +size{K,M,G} (20973568-41943039, default 41943039): +5G Partition 3 of type Linux and of size 5 GiB is set

Command (m for help): t                                                 #修改分区号 Partition number (1-3, default 3): 1 Hex code (type L to list all codes): 8e Changed type of partition 'Linux' to 'Linux LVM'

Command (m for help): t Partition number (1-3, default 3): 2 Hex code (type L to list all codes): 8e Changed type of partition 'Linux' to 'Linux LVM'

Command (m for help): t Partition number (1-3, default 3): 3 Hex code (type L to list all codes): 8e Changed type of partition 'Linux' to 'Linux LVM'

Command (m for help): p                                #查看创建的分区

Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: dos Disk identifier: 0x29162724

   Device Boot      Start         End      Blocks   Id  System /dev/sdb1            2048    10487807     5242880   8e  Linux LVM /dev/sdb2        10487808    20973567     5242880   8e  Linux LVM /dev/sdb3        20973568    31459327     5242880   8e  Linux LVM

Command (m for help): w                       #保存并退出 The partition table has been altered!

Calling ioctl() to re-read partition table. Syncing disks.

[root@centos ~]# pvcreate /dev/sdb{1,2,3}                   #创建物理卷  Physical volume "/dev/sdb1" successfully created.   Physical volume "/dev/sdb2" successfully created.   Physical volume "/dev/sdb3" successfully created.

[root@centos ~]# pvs                                                     #查看物理卷信息   PV         VG     Fmt  Attr PSize   PFree   /dev/sda2  centos lvm2 a--