Showing posts from February, 2016

CentOS - LVM quick notes

Please refer to full documentation online - LVM Administrator's Guide Am not responsible if you break your server by following my notes. TIP : If not sure, always try on TEST server before running your commands on PRODUCTION. SCENARIO : There is a Fresh install of CentOS on VM (TEST Server) [root@localhost ~]# df -h Filesystem                    Size  Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root  6.7G  1.1G  5.3G  17% / tmpfs                         250M  4.0K  250M   1% /dev/shm /dev/sda1                     485M   31M  430M   7% /boot By default LVM is used. REQUIREMENT : Add new logical volume to the server (use existing Volume Group called "VolGroup"). STEPS : 1. add new Virtual Hard Disk (at VMWARE or VIRTUALBOX level) 2. fdisk -l ( e.g newly added disk is /dev/sdb) 3. pvcreate /dev/sdb 4. pvs (verify) 5. vgextend VolGroup /dev/sdb 6. vgs (verify) 7. lvcreate -L 450M -n mydata VolGroup  (create new logical volume of 450MB named &