AKAI TSUKI

System development or Technical something

Create Physical volume in Linux CentOS

Check disk mount and type with df

# df -khT
Filesystem          Type      Size  Used Avail Use% Mounted on
/dev/mapper/cl-root xfs        35G  1.2G   34G   4% /
devtmpfs            devtmpfs  1.9G     0  1.9G   0% /dev
tmpfs               tmpfs     1.9G     0  1.9G   0% /dev/shm
tmpfs               tmpfs     1.9G  8.3M  1.9G   1% /run
tmpfs               tmpfs     1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/sda1           xfs      1014M  182M  833M  18% /boot
tmpfs               tmpfs     380M     0  380M   0% /run/user/0
#

I created LVM partiation. Create LVM type partition in Linux CentOS 7 by fdisk - AKAI TSUKI

before

# fdisk -l

Disk /dev/sda: 85.9 GB, 85899345920 bytes, 167772160 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: 0x000b4090

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200    79691775    38796288   8e  Linux LVM
#

after

# fdisk -l /dev/sda

Disk /dev/sda: 85.9 GB, 85899345920 bytes, 167772160 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: 0x000b4090

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200    79691775    38796288   8e  Linux LVM
/dev/sda3        79691776   111149055    15728640   8e  Linux LVM
/dev/sda4       111149056   167772159    28311552   8e  Linux LVM
#

create PV

After create these partiation, I reboot server and create PV as follows:

# pvcreate /dev/sda3
  Physical volume "/dev/sda3" successfully created.
# pvcreate /dev/sda4
  Physical volume "/dev/sda4" successfully created.
# pvs
  PV         VG Fmt  Attr PSize  PFree
  /dev/sda2  cl lvm2 a--  37.00g  4.00m
  /dev/sda3     lvm2 ---  15.00g 15.00g
  /dev/sda4     lvm2 ---  27.00g 27.00g
#