- 现有一台服务器已经安装了操作系统,接上了盘柜以后,需要创建逻辑卷以供系统挂载使用。整个磁盘作为一个分区,CentOS 6.3文件系统有最大16T限制。
- 首先清除磁盘上的分区表信息:
- [root@SD-H0-ATTACH-G0S0 ~]# dd if=/dev/zero of=/dev/sda bs=512 count=1
- 1+0 records in
- 1+0 records out
- 512 bytes (512 B) copied, 0.000446406 s, 1.1 MB/s
- 创建物理卷
- [root@SD-H0-ATTACH-G0S0 ~]# pvcreate /dev/sda
- Writing physical volume data to disk "/dev/sda"
- Physical volume "/dev/sda" successfully created
- [root@SD-H0-ATTACH-G0S0 ~]# pvdisplay
- --- Physical volume ---
- PV Name /dev/sdb2
- VG Name vg_lvs2
- PV Size 1.09 TiB / not usable 3.00 MiB
- Allocatable yes (but full)
- PE Size 4.00 MiB
- Total PE 285762
- Free PE 0
- Allocated PE 285762
- PV UUID 93Hrn1-R8m4-fv8S-S7G6-3vpa-N4EH-GOevM9
- --- Physical volume ---
- PV Name /dev/sda
- VG Name vg_mongodb
- PV Size 18.19 TiB / not usable 4.00 MiB
- Allocatable yes
- PE Size 4.00 MiB
- Total PE 4767999
- Free PE 4767999
- Allocated PE 0
- PV UUID nUhMM9-S51t-nlKz-wgVS-nkCh-sgXD-Qr4bZv
- 创建物理卷组
- [root@SD-H0-ATTACH-G0S0 ~]# vgcreate vg_mongodb /dev/sda
- Volume group "vg_mongodb" successfully created
- [root@SD-H0-ATTACH-G0S0 ~]# vgs
- VG #PV #LV #SN Attr VSize VFree
- vg_lvs2 1 2 0 wz--n- 1.09t 0
- vg_mongodb 1 0 0 wz--n- 18.19t 18.19t
- 创建逻辑卷
- [root@SD-H0-ATTACH-G0S0 ~]# lvcreate -l 16T -n lv_mongodb vg_mongodb
- Logical volume "lv_mongodb" created
- 格式化文件系统
- [root@SD-H0-ATTACH-G0S0 ~]# mkfs.ext4 /dev/vg_mongodb/lv_mongodb
- mke2fs 1.41.12 (17-May-2010)
- Filesystem label=
- OS type: Linux
- Block size=4096 (log=2)
- Fragment size=4096 (log=2)
- Stride=0 blocks, Stripe width=0 blocks
- 1073741824 inodes, 4294967295 blocks
- 214748364 blocks (5.00%) reserved for the super user
- First data block=0
- 131072 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, 1934917632,
- 2560000000, 3855122432
- Writing inode tables: done
- Creating journal (32768 blocks): done
- Writing superblocks and filesystem accounting information: done
- This filesystem will be automatically checked every 22 mounts or
- 180 days, whichever comes first. Use tune2fs -c or -i to override.
- 挂载使用
- [root@SD-H0-ATTACH-G0S0 ~]# mount /dev/vg_mongodb/lv_mongodb /dragon/data
- [root@SD-H0-ATTACH-G0S0 ~]#
- [root@SD-H0-ATTACH-G0S0 ~]# df -h
- Filesystem Size Used Avail Use% Mounted on
- /dev/mapper/vg_lvs2-lv_root
- 1.1T 2.5G 1.1T 1% /
- tmpfs 7.8G 0 7.8G 0% /dev/shm
- /dev/sdb1 485M 58M 402M 13% /boot
- /dev/mapper/vg_mongodb-lv_mongodb
- 16T 129M 15T 1% /dragon/data