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=11+0 records in1+0 records out512 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_mongodbmke2fs 1.41.12 (17-May-2010)Filesystem label=OS type: LinuxBlock size=4096 (log=2)Fragment size=4096 (log=2)Stride=0 blocks, Stripe width=0 blocks1073741824 inodes, 4294967295 blocks214748364 blocks (5.00%) reserved for the super userFirst data block=0131072 block groups32768 blocks per group, 32768 fragments per group8192 inodes per groupSuperblock 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: doneCreating journal (32768 blocks): doneWriting superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 22 mounts or180 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 -hFilesystem 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
你所缺少的部分，也早已被我用想像的画笔填满。
