Lesson 4.3: Assign physical volumes to volume groups


Case I: Create VG with the default PE

# Create a Volume Group [root@server dev]# vgcreate loanvg /dev/nvme0n3 Volume group "loanvg" successfully created # Viewing the Volume Group Information [root@server dev]# vgdisplay loanvg --- Volume group --- VG Name loanvg System ID Format lvm2 Metadata Areas 1 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 1 Act PV 1 VG Size <6.00 GiB PE Size 4.00 MiB Total PE 1535 Alloc PE / Size 0 / 0 Free PE / Size 1535 / <6.00 GiB VG UUID TdeDuw-dDFu-iI4w-rFNs-QQse-Aye9-pu3gnr

Default PE SIZE is 4.00 MiB

Total PE = (Size of Physical volume) / Pe

Case II: Create VG with the specified PE Size

# Create VG with 16M PE Size [root@server dev]# vgcreate -s 16M loanvg /dev/nvme0n3 Volume group "loanvg" successfully created # View VG [root@server dev]# vgdisplay loanvg --- Volume group --- VG Name loanvg System ID Format lvm2 Metadata Areas 1 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 1 Act PV 1 VG Size 5.98 GiB PE Size 16.00 MiB Total PE 383 Alloc PE / Size 0 / 0 Free PE / Size 383 / 5.98 GiB VG UUID JB30qz-RgVz-cSlB-aegh-rj6d-oqXW-EaIgzs

All systems normal

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