How to extend LVM in Linux
Physical Volumes
Volume Groups
Logical Volumes
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
root centos_centos7 -wi-ao---- <17.00g
swap centos_centos7 -wi-ao---- 2.00g
Locate the new volume to add as a Physical Volume:
Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 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: 0x000b3a0f
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 41943039 19921920 8e Linux LVM
Disk /dev/sdb: 10.7 GB, 10737418240 bytes, 20971520 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 /dev/mapper/centos_centos7-root: 18.2 GB, 18249416704 bytes, 35643392 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 /dev/mapper/centos_centos7-swap: 2147 MB, 2147483648 bytes, 4194304 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
Partition the new disk:
To create new partition Press n
Choose primary partition user p
Change the type using t
Type 8e to change the partition type to Linux LVM
Use p to print the create partition
Press w to write the changes
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x38e14a7a.
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-20971519, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519):
Using default value 20971519
Partition 1 of type Linux and of size 10 GiB is set
Command (m for help): t
Selected partition 1
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
Create the new Physical Volume:
Verify:
PV VG Fmt Attr PSize PFree
/dev/sda2 centos_centos7 lvm2 a-- <19.00g 0
/dev/sdb1 lvm2 --- <10.00g <10.00g
Add the PV to the volume group:
Extend the logical volume with all free space:
Size of logical volume centos_centos7/root changed from <17.00 GiB (4351 extents) to 26.99 GiB (6910 extents).
Logical volume centos_centos7/root successfully resized.
Resize the filesystem:
meta-data=/dev/mapper/centos_centos7-root isize=512 agcount=4, agsize=1113856 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=4455424, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 4455424 to 7075840
Confirm the result:
PV VG Fmt Attr PSize PFree
/dev/sda2 centos_centos7 lvm2 a-- <19.00g 0
/dev/sdb1 centos_centos7 lvm2 a-- <10.00g 0
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
root centos_centos7 -wi-ao---- 26.99g
swap centos_centos7 -wi-ao---- 2.00g