How To Configure LVM on Linux / CentOS / Redhat

ADVERTISEMENT

Page index:
Overview
Setup Physical Volumes
Setup Volume Groups
Setup Logical Volume Group
Extending Volume Group
Extending Logical Volume
Reducing Logical Volume

ADVERTISEMENT
Article will continue after the ad

Page 2 of 7

Make the partition with the id of 8e for LVM.

[root@SRV01 ~]# fdisk/dev/sdc

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel

Building a new DOS disklabel. Changes will remain in memory only,

until you decide to write them. After that, of course, the previous

content won’t be recoverable.

The number of cylinders for this disk is set to 2610.

There is nothing wrong with that, but this is larger than 1024,

and could in certain setups cause problems with:

1) software that runs at boot time (e.g., old versions of LILO)

2) booting and partitioning software from other OSs

(e.g., DOS FDISK, OS/2 FDISK)

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

Command (m for help):

Command (m for help): n ——> to create new partition

Command action

e extended

p primary partition (1-4)

p ——> create a primary partition

Partition number (1-4): 1 ——> partition number

First cylinder (1-2610, default 1):

Using default value 1

Last cylinder or +size or +sizeM or +sizeK (1-2610, default 2610):

Using default value 2610

Command (m for help): t ———-> Changing Partition Id to LVM (8e)

Selected partition 1

Hex code (type L to list codes): l ——> list the Hex Code

0 Empty 1e Hidden W95 FAT1 80 Old Minix bf Solaris

1 FAT12 24 NEC DOS 81 Minix / old Lin c1 DRDOS/sec (FAT-

2 XENIX root 39 Plan 9 82 Linux swap / So c4 DRDOS/sec (FAT-

3 XENIX usr 3c PartitionMagic 83 Linux c6 DRDOS/sec (FAT-

4 FAT16 <32M 40 Venix 80286 84 OS/2 hidden C: c7 Syrinx

5 Extended 41 PPC PReP Boot 85 Linux extended da Non-FS data

6 FAT16 42 SFS 86 NTFS volume set db CP/M / CTOS / .

7 HPFS/NTFS 4d QNX4.x 87 NTFS volume set de Dell Utility

8 AIX 4e QNX4.x 2nd part 88 Linux plaintext df BootIt

9 AIX bootable 4f QNX4.x 3rd part 8e Linux LVM e1 DOS access

a OS/2 Boot Manag 50 OnTrack DM 93 Amoeba e3 DOS R/O

b W95 FAT32 51 OnTrack DM6 Aux 94 Amoeba BBT e4 SpeedStor

c W95 FAT32 (LBA) 52 CP/M 9f BSD/OS eb BeOS fs

e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a0 IBM Thinkpad hi ee EFI GPT

f W95 Ext’d (LBA) 54 OnTrackDM6 a5 FreeBSD ef EFI (FAT-12/16/

10 OPUS 55 EZ-Drive a6 OpenBSD f0 Linux/PA-RISC b

11 Hidden FAT12 56 Golden Bow a7 NeXTSTEP f1 SpeedStor

12 Compaq diagnost 5c Priam Edisk a8 Darwin UFS f4 SpeedStor

14 Hidden FAT16 <3 61 SpeedStor a9 NetBSD f2 DOS secondary

16 Hidden FAT16 63 GNU HURD or Sys ab Darwin boot 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

Hex code (type L to list codes): 8e

Changed system type of partition 1 to 8e (Linux LVM)

Command (m for help): w ——> save the changes

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

Now we do the same for the hard disks /dev/sdc – /dev/sdf

fdisk /dev/sdc
fdisk /dev/sdd
fdisk /dev/sde

fdisk /dev/sdf

Once done use the following command to see the hdd details.

[root@SRV01 ~]# fdisk –l

Disk /dev/sdc: 21.4 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sdc1 1 2610 20964793+ 8e Linux LVM

Disk /dev/sdd: 21.4 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sdd1 1 2610 20964793+ 8e Linux LVM

Disk /dev/sde: 21.4 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sde1 1 2610 20964793+ 8e Linux LVM

Disk /dev/sdf: 21.4 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sdf1 1 2610 20964793+ 8e Linux LVM

Let’s create PV’s for LVM.

[root@SRV01 ~]# pvcreate /dev/sdc1 /dev/sdd1 /dev/sde1

Physical volume “/dev/sdc1” successfully created

Physical volume “/dev/sdd1” successfully created

Physical volume “/dev/sde1” successfully created

Physical volume “/dev/sdf1” successfully created

Let’s remove for testing purpose.

[root@SRV01 ~]# pvremove /dev/sdc1 /dev/sdd1 /dev/sde1

Labels on physical volume “/dev/sdc1” successfully wiped

Labels on physical volume “/dev/sdd1” successfully wiped

Labels on physical volume “/dev/sde1” successfully wiped

Labels on physical volume “/dev/sdf1” successfully wiped

Page 1: Overview

Page 3: Setup Volume Groups

ADVERTISEMENT

POSTS YOU MAY LIKE -:)

Share This Post

Shares