You cannot use a logical volume until you create a valid file system.
To create 10GB of logical volume using the PE size the command would be: # lvcreate -n lv001 -l 2560 vg01 How to Create File system 10GB = 10240MB / 4MB (PE Size) = 2560 PEsĬommon syntax for Logical Volume Creation with PE Size’s (lvcreate). It’s very simple, for example, if you have a volume group of 10 GB, then what is the PE size?īy default, it uses 4MB for the physical extent, but check the correct PE size by running the vgdisplay command, as it may have been created with a different size. LV Creation host, time localhost.localdomain, 11:43:05 -0700īlock device 253:4 How to Create Logical Volume Using PE Size’sĪlternatively, you can create Logical Volumes Using Physical Extends (PE) size. LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert Use the lvs and lvdisplay commands to display information about the LVs you have created. Run the below command to create a logical volume lv001 of size 10 GB. General syntax for creating logical volume (lvcreate) lvcreate –n –L You can use the lvcreate command to create a logical volume. It acts as a virtual disk partition and can be easily managed using LVM commands. Logical volumes are block devices created from the volume group. Logical Volume is the top layer in LVM structure. Volume group "vg01" successfully extended How to Create Logical Volume Using GB Size’s If you do not have space in the VG, Use the following command to add a new physical volume to the existing volume group.Ĭommon syntax for Volume Group extension (vgextend). Use the vgs and vgdisplay commands to display information about the VG you created. For instance, to create a volume group with a size of 32MB physical extent, run: # vgcreate -s 32M vg01 /dev/sdb /dev/sdc /dev/sdd Make a note: By default, it uses 4MB for physical extent, but you can change it based on your need. # vgcreate vg01 /dev/sdb /dev/sdc /dev/sdd Use the following command to add a new physical volume to the new volume group. General syntax for Volume Group creation (vgcreate). You can add physical volume to an existing volume group or create a new volume group for physical volume as needed. Basically the volume group consists of the LVM physical volumes you created. Volume group is the another layer in LVM structure. PV UUID d92fa769-e00f-4fd7-b6ed-ecf7224af7faS How to Create a Volume Group "/dev/sdd" is a new physical volume of "15.00 GiB" "/dev/sdc" is a new physical volume of "15.00 GiB"
"/dev/sdb" is a new physical volume of "15.00 GiB" The pvs command shows summarize output and the pvdisplay shows the detailed output of the PVs. Use the pvdisplay and pvs commands to display the PVs you have created.
Once the disk is detected in the OS, use the pvcreate command to initialize the LVM PV (Physical Volumes). General syntax for the creation of a physical volume (pvcreate). Host0 # echo "-" > /sys/class/scsi_host/host0/scan # fdisk -l Run the following commands to discover newly added LUNs or disks in Linux.
Let’s imagine, you have already added three disks, these disks are /dev/sdb, and /dev/sdc, /dev/sdd. You can use any disk, RAID array, SAN disk, or a partition as the LVM physical volume.