查看分区格式

#需要达到的效果，分区格式为 LVM [root@localhost ~]# fdisk -l

Disk /dev/sdb: 2147.5 GB, 2147483648000 bytes 255 heads, 63 sectors/track, 261083 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x39a49a90

   Device Boot      Start         End      Blocks   Id  System /dev/sdb1               1      261083  2097149166   8e  Linux LVM

修改分区格式为8e(lvm) [root@localhost ~]# fdisk /dev/sdb Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel with disk identifier 0x10342e9b. Changes will remain in memory only, until you decide to write them. After that, of course, the previous content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

WARNING: DOS-compatible mode is deprecated. It's strongly recommended to          switch off the mode (command 'c') and change display units to          sectors (command 'u').

Command (m for help): m Command action    a   toggle a bootable flag    b   edit bsd disklabel    c   toggle the dos compatibility flag    d   delete a partition    l   list known partition types    m   print this menu    n   add a new partition    o   create a new empty DOS partition table    p   print the partition table    q   quit without saving changes    s   create a new empty Sun disklabel    t   change a partition's system id    u   change display/entry units    v   verify the partition table    w   write table to disk and exit    x   extra functionality (experts only)

Command (m for help): n                            #####输入n Command action    e   extended    p   primary partition (1-4) p Partition number (1-4): 1 First cylinder (1-97906, default 1):                   #####回车 Using default value 1 Last cylinder, +cylinders or +size{K,M,G} (1-97906, default 97906):                 #####回车，或者+size xxG，自己定 Using default value 97906

Command (m for help): t                         #####输入t Selected partition 1 Hex code (type L to list codes): 8e                         #####输入8e Changed system type of partition 1 to 8e (Linux LVM)

Command (m for help): p                                   #####查看修改之后

Disk /dev/sdd: 805.3 GB, 805306368000 bytes 255 heads, 63 sectors/track, 97906 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x10342e9b

   Device Boot      Start         End      Blocks   Id  System /dev/sdd1               1       97906   786429913+  8e  Linux LVM

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

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

[root@localhost ~]# lsblk NAME                        MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT sr0                          11:0    1 1024M  0 rom   sda                           8:0    0  100G  0 disk  ├─sda1                        8:1    0  500M  0 part /boot └─sda2                        8:2    0 99.5G  0 part    ├─VolGroup-lv_root (dm-0) 253:0    0   50G  0 lvm  /   ├─VolGroup-lv_swap (dm-1) 253:1    0   10G  0 lvm  [SWAP]   └─VolGroup-lv_home (dm-2) 253:2    0 39.5G  0 lvm  /home sdb                           8:16   0    2T  0 disk  └─sdb1                        8:17   0    2T  0 part  sdc                           8:32   0  450G  0 disk  └─sdc1                        8:33   0  450G  0 part  sdd                           8:48   0  750G  0 disk  └─sdd1                        8:49   0  750G  0 part 

查看现有物理卷命令 [root@localhost ~]# pvdisplay   --- Physical volume ---   PV Name               /dev/sda2   VG Name               VolGroup   PV Size               99.51 GiB / not usable 3.00 MiB   Allocatable           yes (but full)   PE Size               4.00 MiB   Total PE              25474   Free PE               0   Allocated PE          25474   PV UUID               5CJGsP-wPWT-SumD-QXtC-9xQc-Gupc-41LYlF

扫描当前系统中所有硬盘的物理卷   

[root@localhost ~]# pvscan   PV /dev/sda2   VG VolGroup   lvm2 [99.51 GiB / 0    free]   Total: 1 [99.51 GiB] / in use: 1 [99.51 GiB] / in no VG: 0 [0   ]

创建物理卷 PV

#创建物理卷,将sdb1,sdc1和sdd1分区转成pv（这里根据现实资源） [root@localhost ~]# pvcreate /dev/sdb1 /dev/sdc1 /dev/sdd1   Physical volume "/dev/sdb1" successfully created   Physical volume "/dev/sdc1" successfully created   Physical volume "/dev/sdd1" successfully created

输出格式化的物理卷信息报表

[root@localhost ~]# pvs   PV         VG   Fmt  Attr PSize   PFree     /dev/sdb1       lvm2 a--    1.95t   1.95t   /dev/sdc1       lvm2 a--  449.99g 449.99g   /dev/sdd1       lvm2 a--  750.00g 750.00g

创建卷组 VG

创建卷组VolGroup_01，并且将物理卷/dev/sd{b1,c1,d1}添加到卷组中 [root@localhost ~]# vgcreate VolGroup_01 /dev/sd{b1,c1,d1}   Volume group "VolGroup_01" successfully created

查看新创建的VG

[root@localhost ~]# vgs   VG          #PV #LV #SN Attr   VSize  VFree   VolGroup      1   3   0 wz--n- 99.51g    0    VolGroup_01   3   0   0 wz--n-  3.12t 3.12t [root@localhost ~]# vgdisplay   --- Volume group ---   VG Name               VolGroup_01   System ID                Format                lvm2   Metadata Areas        3   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                3   Act PV                3   VG Size               3.12 TiB   PE Size               4.00 MiB   Total PE              819196   Alloc PE / Size       0 / 0      Free  PE / Size       819196 / 3.12 TiB   VG UUID               13Ktx5-BiIm-9DS8-H6BH-xu39-aS0T-Gs1Hux       --- Volume group ---   VG Name               VolGroup   System ID                Format                lvm2   Metadata Areas        1   Metadata Sequence No  4   VG Access             read/write   VG Status             resizable   MAX LV                0   Cur LV                3   Open LV               3   Max PV                0   Cur PV                1   Act PV                1   VG Size               99.51 GiB   PE Size               4.00 MiB   Total PE              25474   Alloc PE / Size       25474 / 99.51 GiB   Free  PE / Size       0 / 0      VG UUID               Ho7xTt-MEjV-XcUm-cXtp-VA2v-NtRx-cqPS9A                                   

创建逻辑卷 LV

#819196就是从上面执行的命令”vgdisplay“ VolGroup_01 中列出所有PE数量的空间给 lv_data 使用 [root@localhost ~]# lvcreate -l 819196 -n lv_data VolGroup_01   Logical volume "lv_data" created    -L    指定创建的LV 的大小 -l    指定创建的LV 的PE 数量 -n    LV的名字

查看已创建的LV

[root@localhost ~]# lvdisplay   --- Logical volume ---   LV Path                /dev/VolGroup_01/lv_data   LV Name                lv_data   VG Name                VolGroup_01   LV UUID                2A0W6d-16Rv-Vc1u-34Bi-GPH8-bXWg-xgv0NN   LV Write Access        read/write   LV Creation host, time localhost, 2019-02-21 17:44:57 +0800   LV Status              available   # open                 0   LV Size                3.12 TiB   Current LE             819196   Segments               3   Allocation             inherit   Read ahead sectors     auto   - currently set to     256   Block device           253:3

挂载文件系统            

#先格式化 LV                                         [root@localhost VolGroup_01]# mkfs.ext4 /dev/VolGroup_01/lv_data mke2fs 1.41.12 (17-May-2010) 文件系统标签= 操作系统:Linux 块大小=4096 (log=2) 分块大小=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 209715200 inodes, 838856704 blocks 41942835 blocks (5.00%) reserved for the super user 第一个数据块=0 Maximum filesystem blocks=4294967296 25600 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks:      32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,      4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,      102400000, 214990848, 512000000, 550731776, 644972544

正在写入inode表: 完成                             Creating journal (32768 blocks): 完成 Writing superblocks and filesystem accounting information: 完成

This filesystem will be automatically checked every 34 mounts or 180 days, whichever comes first.  Use tune2fs -c or -i to override.

创建挂载目录并挂载

mkdir /data mount /dev/VolGroup_01/lv_data /data

写入fstab

[root@localhost VolGroup_01]# vi /etc/fstab /dev/mapper/VolGroup_01-lv_data    /data    ext4    defaults    0 0

检查磁盘是否挂载

[root@localhost VolGroup_01]# df -h Filesystem                       Size  Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root      50G  1.1G   46G   3% / tmpfs                             16G     0   16G   0% /dev/shm /dev/sda1                        485M   33M  427M   8% /boot /dev/mapper/VolGroup-lv_home      39G  3.8G   34G  11% /home /dev/mapper/VolGroup_01-lv_data  3.1T  199M  3.0T   1% /data