Please Follow the below steps to create LVM and mount it on /home:
Step 1: mv /home /home_temp/
Step 2: fdisk /dev/vdc (/dev/vdc you can verify the same using fdisk -l) ———Create an Linux LVM partiton
fdisk /dev/vdc
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0xc22314ad.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): p
Disk /dev/vdc: 53.7 GB, 53653536768 bytes
16 heads, 63 sectors/track, 103960 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xc22314ad
Device Boot Start End Blocks Id System
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-103960, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-103960, default 103960):
Using default value 103960
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): L
0 Empty 24 NEC DOS 81 Minix / old Lin bf Solaris
1 FAT12 39 Plan 9 82 Linux swap / So c1 DRDOS/sec (FAT-
2 XENIX root 3c PartitionMagic 83 Linux c4 DRDOS/sec (FAT-
3 XENIX usr 40 Venix 80286 84 OS/2 hidden C: c6 DRDOS/sec (FAT-
4 FAT16 <32M 41 PPC PReP Boot 85 Linux extended c7 Syrinx
5 Extended 42 SFS 86 NTFS volume set da Non-FS data
6 FAT16 4d QNX4.x 87 NTFS volume set db CP/M / CTOS / .
7 HPFS/NTFS 4e QNX4.x 2nd part 88 Linux plaintext de Dell Utility
8 AIX 4f QNX4.x 3rd part 8e Linux LVM df BootIt
9 AIX bootable 50 OnTrack DM 93 Amoeba e1 DOS access
a OS/2 Boot Manag 51 OnTrack DM6 Aux 94 Amoeba BBT e3 DOS R/O
b W95 FAT32 52 CP/M 9f BSD/OS e4 SpeedStor
c W95 FAT32 (LBA) 53 OnTrack DM6 Aux a0 IBM Thinkpad hi eb BeOS fs
e W95 FAT16 (LBA) 54 OnTrackDM6 a5 FreeBSD ee GPT
f W95 Ext'd (LBA) 55 EZ-Drive a6 OpenBSD ef EFI (FAT-12/16/
10 OPUS 56 Golden Bow a7 NeXTSTEP f0 Linux/PA-RISC b
11 Hidden FAT12 5c Priam Edisk a8 Darwin UFS f1 SpeedStor
12 Compaq diagnost 61 SpeedStor a9 NetBSD f4 SpeedStor
14 Hidden FAT16 <3 63 GNU HURD or Sys ab Darwin boot f2 DOS secondary
16 Hidden FAT16 64 Novell Netware af HFS / HFS+ fb VMware VMFS
17 Hidden HPFS/NTF 65 Novell Netware b7 BSDI fs fc VMware VMKCORE
18 AST SmartSleep 70 DiskSecure Mult b8 BSDI swap fd Linux raid auto
1b Hidden W95 FAT3 75 PC/IX bb Boot Wizard hid fe LANstep
1c Hidden W95 FAT3 80 Old Minix be Solaris boot ff BBT
1e Hidden W95 FAT1
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)
Command (m for help): p
Disk /dev/vdc: 53.7 GB, 53653536768 bytes
16 heads, 63 sectors/track, 103960 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xc22314ad
Device Boot Start End Blocks Id System
/dev/vdc1 1 103960 52395808+ 8e Linux LVM
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
Step 3: pvcreate /dev/vdc1 (Creating physical Voloume group)
Step 4: vgcreate vgsan /dev/vdc1
Step 5: lvcreate -L 49.96G -n lvsan vgsan or you can use lvcreate -l 100%FREE -n lvsan vgsan
Step 6: mkfs.ext4 /dev/mapper/vgsan-lvsan
Step 7: Now add the entry in /etc/fstab and mount
#
# /etc/fstab
# Created by anaconda on Tue May 7 08:31:46 2013
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=5279d38a-889e-48e7-a0fa-5c52bfb70a67 / ext4 defaults,noatime,nodiratime 1 1
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
UUID=6d666213-be08-4eeb-a13d-ec0ff3d274ac swap swap defaults 0 0
/usr/tmpDSK /tmp ext3 noauto,noexec,rw 0 0
/dev/mapper/vgsan-lvsan /home ext4 defaults 0 0
Step 8: mount /home
Step 9: Now, we need to copy the contents of the home_temp to home run screen
cd /home_temp
cp -a * /home (This will take some time to complete)
Once this is done, reboot the server and remove the home_temp directory once this is up.
*****************************************************************************************************************************************************************************************************************************************
If the client is adding new SAN and he want to merge it with the current “/home”. Please follow the below steps:
Step 1: fdisk /dev/vdd (/dev/vdd you can verify the same using fdisk -l) ———Create an Linux LVM partiton
fdisk /dev/vdd
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0xb08662e9.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): p
Disk /dev/vdd: 53.7 GB, 53653536768 bytes
16 heads, 63 sectors/track, 103960 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xb08662e9
Device Boot Start End Blocks Id System
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-103960, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-103960, default 103960):
Using default value 103960
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)
Command (m for help): p
Disk /dev/vdd: 53.7 GB, 53653536768 bytes
16 heads, 63 sectors/track, 103960 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xb08662e9
Device Boot Start End Blocks Id System
/dev/vdd1 1 103960 52395808+ 8e Linux LVM
Command (m for help):
Command (m for help):
Command (m for help):
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
Step 2: pvcreate /dev/vdd1
Step 3: vgextend vgsan /dev/vdd1
Step 4: lvextend -l +100%FREE -r /dev/mapper/sanstorage1-sanlv
*Note: Please note that if you are reducing you need to umount the /home