Step 1
[root@subash ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 5.4G 0 5.4G 0% /dev
tmpfs 5.4G 0 5.4G 0% /dev/shm
tmpfs 5.4G 13M 5.4G 1% /run
tmpfs 5.4G 0 5.4G 0% /sys/fs/cgroup
/dev/mapper/ol-root 25G 11G 15G 42% /
/dev/sda1 5.7G 303M 5.1G 6% /boot
/dev/mapper/ol-temp 20G 45M 19G 1% /temp
/dev/mapper/ol-u01 287G 47G 226G 17% /u01
tmpfs 1.1G 24K 1.1G 1% /run/user/0
[root@subash ~]# partprobe
Step 2 : To check the block
[root@subash ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 390G 0 disk
├─sda1 8:1 0 5.9G 0 part /boot
└─sda2 8:2 0 354.1G 0 part
├─ol-root 249:0 0 25G 0 lvm /
├─ol-swap 249:1 0 18G 0 lvm [SWAP]
├─ol-temp 249:2 0 20G 0 lvm /temp
└─ol-u01 249:3 0 291.1G 0 lvm /u01
sdb 8:16 0 10G 0 disk
sr0 11:0 1 1024M 0 rom
Step 3 : To check the PVdisplay
[root@subash ~]# pvdisplay
— Physical volume —
PV Name /dev/sda2
VG Name ol
PV Size <354.14 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 90658
Free PE 0
Allocated PE 90658
PV UUID 2BoLTV-2XEq-3TPr-eEK8-Akw1-iT9E-M1rXi9
Step 4 : To check the VG-display
[root@subash ~]# vgdisplay
— Volume group —
VG Name ol
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 4
Open LV 4
Max PV 0
Cur PV 1
Act PV 1
VG Size 354.13 GiB
PE Size 4.00 MiB
Total PE 90658
Alloc PE / Size 90658 / 354.13 GiB
Free PE / Size 0 / 0
VG UUID 7mUrR8-pSbE-mlGn-q771-T1cd-mwgE-nmIcXS
Step 5 : To check the lvdisplay
[root@subash ~]# lvdisplay
— Logical volume —
LV Path /dev/ol/temp
LV Name temp
VG Name ol
LV UUID 0QGQNQ-d8kn-dmvT-wL5M-1eSL-3G6f-LyIMr4
LV Write Access read/write
LV Creation host, time subash.ebs.com, 2020-07-21 12:14:38 +0530
LV Status available
# open 1
LV Size 20.00 GiB
Current LE 5120
Segments 1
Allocation inherit
Read ahead sectors auto
– currently set to 8192
Block device 249:2
— Logical volume —
LV Path /dev/ol/swap
LV Name swap
VG Name ol
LV UUID Gq99hH-NxAr-vXfb-GfDN-4ahl-bjh8-uYNlLc
LV Write Access read/write
LV Creation host, time subash.ebs.com, 2020-07-21 12:14:38 +0530
LV Status available
# open 2
LV Size 18.00 GiB
Current LE 4608
Segments 1
Allocation inherit
Read ahead sectors auto
– currently set to 8192
Block device 249:1
— Logical volume —
LV Path /dev/ol/root
LV Name root
VG Name ol
LV UUID F0qHty-220k-YAaL-VP2Y-hGi4-fD5R-JrEbqE
LV Write Access read/write
LV Creation host, time subash.ebs.com, 2020-07-21 12:14:38 +0530
LV Status available
# open 1
LV Size 25.00 GiB
Current LE 6400
Segments 1
Allocation inherit
Read ahead sectors auto
– currently set to 8192
Block device 249:0
— Logical volume —
LV Path /dev/ol/u01
LV Name u01
VG Name ol
LV UUID 1z6wMS-TPPh-aUyH-Z0QQ-6Hws-tdAG-pDEOWt
LV Write Access read/write
LV Creation host, time subash.ebs.com, 2020-07-21 12:14:39 +0530
LV Status available
# open 1
LV Size 291.13 GiB
Current LE 74530
Segments 1
Allocation inherit
Read ahead sectors auto
– currently set to 8192
Block device 249:3
Step – 6 To create the sdb
[root@subash ~]# pvcreate /dev/sdb
Physical volume “/dev/sdb” successfully created.
[root@subash ~]# man vgcreate
[root@subash ~]# vgcreate ol /dev/sda2 /dev/sdb
/dev/ol: already exists in filesystem
Run `vgcreate –help’ for more information.
[root@subash ~]# vgdisplay
— Volume group —
VG Name ol
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 4
Open LV 4
Max PV 0
Cur PV 1
Act PV 1
VG Size 354.13 GiB
PE Size 4.00 MiB
Total PE 90658
Alloc PE / Size 90658 / 354.13 GiB
Free PE / Size 0 / 0
VG UUID 7mUrR8-pSbE-mlGn-q771-T1cd-mwgE-nmIcXS
[root@subash ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 5.4G 0 5.4G 0% /dev
tmpfs 5.4G 0 5.4G 0% /dev/shm
tmpfs 5.4G 13M 5.4G 1% /run
tmpfs 5.4G 0 5.4G 0% /sys/fs/cgroup
/dev/mapper/ol-root 25G 11G 15G 42% /
/dev/sda1 5.7G 303M 5.1G 6% /boot
/dev/mapper/ol-temp 20G 45M 19G 1% /temp
/dev/mapper/ol-u01 287G 47G 226G 17% /u01
tmpfs 1.1G 24K 1.1G 1% /run/user/0
[root@subash ~]# vgcreate ol /dev/sdb
/dev/ol: already exists in filesystem
Run `vgcreate –help’ for more information.
[root@subash ~]# vgcreate –helpvgcreate – Create a volume group
vgcreate VG_new PV …
[ -A|–autobackup y|n ] [ -c|–clustered y|n ] [ -l|–maxlogicalvolumes Number ] [ -p|–maxphysicalvolumes Number ] [ -M|–metadatatype lvm2|lvm1 ] [ -s|–physicalextentsize Size[m|UNIT] ] [ -f|–force ] [ -Z|–zero y|n ] [ –addtag Tag ] [ –alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit ] [ –metadataprofile String ] [ –labelsector Number ] [ –metadatasize Size[m|UNIT] ] [ –pvmetadatacopies 0|1|2 ] [ –vgmetadatacopies all|unmanaged|Number ] [ –reportformat basic|json ] [ –dataalignment Size[k|UNIT] ] [ –dataalignmentoffset Size[k|UNIT] ] [ –shared ] [ –systemid String ] [ –locktype sanlock|dlm|none ] [ COMMON_OPTIONS ]
Common options for lvm:
[ -d|–debug ] [ -h|–help ] [ -q|–quiet ] [ -v|–verbose ] [ -y|–yes ] [ -t|–test ] [ –commandprofile String ] [ –config String ] [ –driverloaded y|n ] [ –lockopt String ] [ –longhelp ] [ –profile String ] [ –version ]
Use –longhelp to show all options and advanced commands.
[root@subash ~]# dd if=/dev/zero of=/usr/tmp-dir bs=1024M count=2
2+0 records in
2+0 records out
2147483648 bytes (2.1 GB) copied, 27.0306 s, 79.4 MB/s
[root@subash ~]# mke2fs -j /usr/tmp-dir
\mke2fs 1.42.9 (28-Dec-2013)
/usr/tmp-dir is not a block special device.
Proceed anyway? (y,n) y
[root@subash ~]# mount -t ext3 -o loop /usr/tmp-dir /tmp
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog – try
dmesg | tail or so.
[root@subash ~]# mount -t ext3 -o loop /usr/tmp-dir /tmp
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog – try
dmesg | tail or so.
[root@subash ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 5.4G 0 5.4G 0% /dev
tmpfs 5.4G 0 5.4G 0% /dev/shm
tmpfs 5.4G 13M 5.4G 1% /run
tmpfs 5.4G 0 5.4G 0% /sys/fs/cgroup
/dev/mapper/ol-root 25G 13G 13G 50% /
/dev/sda1 5.7G 303M 5.1G 6% /boot
/dev/mapper/ol-temp 20G 45M 19G 1% /temp
/dev/mapper/ol-u01 287G 47G 226G 17% /u01
tmpfs 1.1G 24K 1.1G 1% /run/user/0
[root@subash ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 390G 0 disk
├─sda1 8:1 0 5.9G 0 part /boot
└─sda2 8:2 0 354.1G 0 part
├─ol-root 249:0 0 25G 0 lvm /
├─ol-swap 249:1 0 18G 0 lvm [SWAP]
├─ol-temp 249:2 0 20G 0 lvm /temp
└─ol-u01 249:3 0 291.1G 0 lvm /u01
sdb 8:16 0 10G 0 disk
sr0 11:0 1 1024M 0 rom
[root@subash ~]# fdisk /dev/sdb
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 0x2a77af4d.
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): 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
Command (m for help): 8e
8: unknown command
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): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p):
Using default response 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): 6G
Value out of range.
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): p
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 label type: dos
Disk identifier: 0x2a77af4d
Device Boot Start End Blocks Id System
/dev/sdb1 2048 20971519 10484736 83 Linux
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): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@subash ~]# partprobe
[root@subash ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 390G 0 disk
├─sda1 8:1 0 5.9G 0 part /boot
└─sda2 8:2 0 354.1G 0 part
├─ol-root 249:0 0 25G 0 lvm /
├─ol-swap 249:1 0 18G 0 lvm [SWAP]
├─ol-temp 249:2 0 20G 0 lvm /temp
└─ol-u01 249:3 0 291.1G 0 lvm /u01
sdb 8:16 0 10G 0 disk
└─sdb1 8:17 0 10G 0 part
sr0 11:0 1 1024M 0 rom
[root@subash ~]# pvcreate /dev/sdb1
Physical volume “/dev/sdb1” successfully created.
[root@subash ~]# vgextend ol /dev/sdb1
Volume group “ol” successfully extended
[root@subash ~]# lvextend -L +5G /dev/mapper/ol-uo1
Logical volume uo1 not found in volume group ol.
[root@subash ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 5.4G 0 5.4G 0% /dev
tmpfs 5.4G 0 5.4G 0% /dev/shm
tmpfs 5.4G 13M 5.4G 1% /run
tmpfs 5.4G 0 5.4G 0% /sys/fs/cgroup
/dev/mapper/ol-root 25G 13G 13G 50% /
/dev/sda1 5.7G 303M 5.1G 6% /boot
/dev/mapper/ol-temp 20G 45M 19G 1% /temp
/dev/mapper/ol-u01 287G 47G 226G 17% /u01
tmpfs 1.1G 24K 1.1G 1% /run/user/0
[root@subash ~]# lvextend -L +5G /dev/ol/ol-uo1
Logical volume ol-uo1 not found in volume group ol.
[root@subash ~]# lvextend -L +5G /dev/mapper/ol-u01
Size of logical volume ol/u01 changed from 291.13 GiB (74530 extents) to 296.13 GiB (75810 extents).
Logical volume ol/u01 successfully resized.
[root@subash ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 5.4G 0 5.4G 0% /dev
tmpfs 5.4G 0 5.4G 0% /dev/shm
tmpfs 5.4G 13M 5.4G 1% /run
tmpfs 5.4G 0 5.4G 0% /sys/fs/cgroup
/dev/mapper/ol-root 25G 13G 13G 50% /
/dev/sda1 5.7G 303M 5.1G 6% /boot
/dev/mapper/ol-temp 20G 45M 19G 1% /temp
/dev/mapper/ol-u01 287G 47G 226G 17% /u01
tmpfs 1.1G 24K 1.1G 1% /run/user/0
[root@subash ~]# man resize2fs
[root@subash ~]# resize2fs /dev/mapper/ol-u01
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/mapper/ol-u01 is mounted on /u01; on-line resizing required
old_desc_blocks = 37, new_desc_blocks = 38
The filesystem on /dev/mapper/ol-u01 is now 77629440 blocks long.
[root@subash ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 5.4G 0 5.4G 0% /dev
tmpfs 5.4G 0 5.4G 0% /dev/shm
tmpfs 5.4G 13M 5.4G 1% /run
tmpfs 5.4G 0 5.4G 0% /sys/fs/cgroup
/dev/mapper/ol-root 25G 13G 13G 50% /
/dev/sda1 5.7G 303M 5.1G 6% /boot
/dev/mapper/ol-temp 20G 45M 19G 1% /temp
/dev/mapper/ol-u01 292G 47G 231G 17% /u01
tmpfs 1.1G 24K 1.1G 1% /run/user/0
