- Check current virtual disk
[root@localhost ~]# fdisk -l /dev/xvda
Disk /dev/xvda: 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: 0x000b3dc8
Device Boot Start End Blocks Id System
/dev/xvda1 * 2048 1026047 512000 83 Linux
/dev/xvda2 1026048 41943039 20458496 8e Linux LVM
- Edit virtual disk in Oracle VM Manager, e.g. adjust the size from 20G to 80G
- Reboot the VM
[root@localhost ~]# fdisk -l /dev/xvda
Disk /dev/xvda: 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: 0x000b3dc8
Device Boot Start End Blocks Id System
/dev/xvda1 * 2048 1026047 512000 83 Linux
/dev/xvda2 1026048 41943039 20458496 8e Linux LVM
The Disk size has been changed from 21.5 GB to 85.9 GB
- Delete and recreate the LVM partition (the data will be remain unchanged)
[root@hktasu168 ~]# fdisk /dev/xvda
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.
Command (m for help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
g create a new empty GPT partition table
G create an IRIX (SGI) partition table
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
Command (m for help): p
Disk /dev/xvda: 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: 0x000b3dc8
Device Boot Start End Blocks Id System
/dev/xvda1 * 2048 1026047 512000 83 Linux
/dev/xvda2 1026048 41943039 20458496 8e Linux LVM
Command (m for help): d
Partition number (1,2, default 2): 2
Partition 2 is deleted
Command (m for help): n
Partition type:
p primary (1 primary, 0 extended, 3 free)
e extended
Select (default p): p
Partition number (2-4, default 2): 2
First sector (1026048-167772159, default 1026048):
Using default value 1026048
Last sector, +sectors or +size{K,M,G} (1026048-167772159, default 167772159):
Using default value 167772159
Partition 2 of type Linux and of size 79.5 GiB is set
Command (m for help): p
Disk /dev/xvda: 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: 0x000b3dc8
Device Boot Start End Blocks Id System
/dev/xvda1 * 2048 1026047 512000 83 Linux
/dev/xvda2 1026048 167772159 83373056 83 Linux
Command (m for help): t
Partition number (1,2, default 2): 2
Hex code (type L to list all codes): L
0 Empty 24 NEC DOS 81 Minix / old Lin bf Solaris
1 FAT12 27 Hidden NTFS Win 82 Linux swap / So c1 DRDOS/sec (FAT-
2 XENIX root 39 Plan 9 83 Linux c4 DRDOS/sec (FAT-
3 XENIX usr 3c PartitionMagic 84 OS/2 hidden C: c6 DRDOS/sec (FAT-
4 FAT16 <32M 40 Venix 80286 85 Linux extended c7 Syrinx
5 Extended 41 PPC PReP Boot 86 NTFS volume set da Non-FS data
6 FAT16 42 SFS 87 NTFS volume set db CP/M / CTOS / .
7 HPFS/NTFS/exFAT 4d QNX4.x 88 Linux plaintext de Dell Utility
8 AIX 4e QNX4.x 2nd part 8e Linux LVM df BootIt
9 AIX bootable 4f QNX4.x 3rd part 93 Amoeba e1 DOS access
a OS/2 Boot Manag 50 OnTrack DM 94 Amoeba BBT e3 DOS R/O
b W95 FAT32 51 OnTrack DM6 Aux 9f BSD/OS e4 SpeedStor
c W95 FAT32 (LBA) 52 CP/M a0 IBM Thinkpad hi eb BeOS fs
e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a5 FreeBSD ee GPT
f W95 Ext'd (LBA) 54 OnTrackDM6 a6 OpenBSD ef EFI (FAT-12/16/
10 OPUS 55 EZ-Drive a7 NeXTSTEP f0 Linux/PA-RISC b
11 Hidden FAT12 56 Golden Bow a8 Darwin UFS f1 SpeedStor
12 Compaq diagnost 5c Priam Edisk a9 NetBSD f4 SpeedStor
14 Hidden FAT16 <3 61 SpeedStor ab Darwin boot f2 DOS secondary
16 Hidden FAT16 63 GNU HURD or Sys af HFS / HFS+ fb VMware VMFS
17 Hidden HPFS/NTF 64 Novell Netware b7 BSDI fs fc VMware VMKCORE
18 AST SmartSleep 65 Novell Netware b8 BSDI swap fd Linux raid auto
1b Hidden W95 FAT3 70 DiskSecure Mult bb Boot Wizard hid fe LANstep
1c Hidden W95 FAT3 75 PC/IX be Solaris boot ff BBT
1e Hidden W95 FAT1 80 Old Minix
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.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
- Reboot the VM
- Resize the physical volume
[root@localhost ~]# pvdisplay
--- Physical volume ---
PV Name /dev/xvda2
VG Name ol
PV Size 19.51 GiB / not usable 2.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 4994
Free PE 0
Allocated PE 4994
PV UUID U3oe3C-7qVe-YuHm-5toc-QfDF-YYWn-6hw6vB
[root@localhost ~]# pvresize /dev/xvda2
Physical volume "/dev/xvda2" changed
1 physical volume(s) resized / 0 physical volume(s) not resized
[root@localhost ~]# pvdisplay
--- Physical volume ---
PV Name /dev/xvda2
VG Name ol
PV Size 79.51 GiB / not usable 2.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 20354
Free PE 15360
Allocated PE 4994
PV UUID U3oe3C-7qVe-YuHm-5toc-QfDF-YYWn-6hw6vB
- Resize the root volume
[root@hktasu168 ~]# lvdisplay
--- Logical volume ---
LV Path /dev/ol/swap
LV Name swap
VG Name ol
LV UUID Zv0fXc-mgql-6XAZ-fq0o-Ek3j-YGwz-nsSsUY
LV Write Access read/write
LV Creation host, time localhost, 2017-07-06 03:13:47 -0400
LV Status available
# open 2
LV Size 2.00 GiB
Current LE 512
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:0
--- Logical volume ---
LV Path /dev/ol/root
LV Name root
VG Name ol
LV UUID 1xdvMc-tkPn-CsIM-vxwC-3uv8-fNZx-y0h1mf
LV Write Access read/write
LV Creation host, time localhost, 2017-07-06 03:13:47 -0400
LV Status available
# open 1
LV Size 17.51 GiB
Current LE 4482
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:1
[root@hktasu168 ~]# lvextend -l +100%FREE /dev/ol/root
Size of logical volume ol/root changed from 17.51 GiB (4482 extents) to 77.51 GiB (19842 extents).
Logical volume ol/root successfully resized.
[root@hktasu168 ~]# lvdisplay
--- Logical volume ---
LV Path /dev/ol/swap
LV Name swap
VG Name ol
LV UUID Zv0fXc-mgql-6XAZ-fq0o-Ek3j-YGwz-nsSsUY
LV Write Access read/write
LV Creation host, time localhost, 2017-07-06 03:13:47 -0400
LV Status available
# open 2
LV Size 2.00 GiB
Current LE 512
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:0
--- Logical volume ---
LV Path /dev/ol/root
LV Name root
VG Name ol
LV UUID 1xdvMc-tkPn-CsIM-vxwC-3uv8-fNZx-y0h1mf
LV Write Access read/write
LV Creation host, time localhost, 2017-07-06 03:13:47 -0400
LV Status available
# open 1
LV Size 77.51 GiB
Current LE 19842
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:1
- Resize the file system
[root@hktasu168 ~]# resize2fs /dev/mapper/ol-root
resize2fs 1.42.9 (28-Dec-2013)
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/ol-root
Couldn’t find valid filesystem superblock.
- As Oracle Linux 7 is using
xfs as default file system, so we need to install xfsprogs to resize the file system yum install xfsprogs. Then:[root@hktasu168 ~]# xfs_growfs /dev/mapper/ol-root
meta-data=/dev/mapper/ol-root isize=256 agcount=4, agsize=1147392 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0 finobt=0 spinodes=0
data = bsize=4096 blocks=4589568, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
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 4589568 to 20318208
[root@hktasu168 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/ol-root 78G 7.8G 70G 10% /
devtmpfs 3.8G 0 3.8G 0% /dev
tmpfs 3.8G 0 3.8G 0% /dev/shm
tmpfs 3.8G 8.7M 3.8G 1% /run
tmpfs 3.8G 0 3.8G 0% /sys/fs/cgroup
/dev/xvda1 497M 142M 356M 29% /boot
tmpfs 773M 0 773M 0% /run/user/0