Linux System Management PV-VG-LV

Experiment

Take 10G from each of the two disks and make up the 20G volume group. Divides a 16G logical volume from a volume group, formats and mounts the logical volume to/mbox.

1. Add disk SDB and divide the disk into a 10G zone.

[Email protected] ~]# Fdisk/dev/sdb

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

Partition number (1-4): 1

First cylinder (1-10443, default 1):

Using Default value 1

Last cylinder, +cylinders or +size{k,m,g} (1-10443, default 10443): +10g

2. Change the partition format to LVM

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 {Enter P to view create disk partition information}

disk/dev/sdb:85.9 GB, 85899345920 bytes

255 heads, Sectors/track, 10443 cylinders

Units = Cylinders of 16065 * 8225280 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk identifier:0x8ba5d75e

Device Boot Start End Blocks Id System

/DEV/SDB1 1 1306 10490413+ 8e Linux LVM

Command (M for help): W {confirm the creation of OK and enter W save

3. Add a second disk repeat above 1.2. Operation

4. Check if two LVM disks are OK

[Email protected] ~]# fdisk-l |grep LVM

/DEV/SDB1 1 1306 10490413+ 8e Linux LVM

/DEV/SDC1 1 1306 10490413+ 8e Linux LVM

5. Create PV

[Email protected] ~]# PVCREATE/DEV/SDB1/DEV/SDC1

Dev_is_mpath:failed to get device for 8:17

Physical volume "/DEV/SDB1" successfully created

Dev_is_mpath:failed to get device for 8:33

Physical volume "/DEV/SDC1" successfully created

6. View the creation of the PV

[Email protected] ~]# Pvscan

PV/DEV/SDB1 lvm2 [10.00 GiB]

PV/DEV/SDC1 lvm2 [10.00 GiB]

Total:2 [20.01 Gib]/in use:0 [0]/In no vg:2 [20.01 Gib]

7. View PV Details

[Email protected] ~]# Pvdisplay

"/DEV/SDB1" is a new physical volume of "10.00 GiB"

---NEW physical volume---

PV NAME/DEV/SDB1

VG Name

PV Size 10.00 GiB

Allocatable NO

PE Size 0

Total PE 0

Free PE 0

Allocated PE 0

PV UUID ZEKDRX-NPLC-T3RC-OSP1-122X-LU1A-YWBJFS

"/DEV/SDC1" is a new physical volume of "10.00 GiB"

---NEW physical volume---

PV NAME/DEV/SDC1

VG Name

PV Size 10.00 GiB

Allocatable NO

PE Size 0

Total PE 0

Free PE 0

Allocated PE 0

PV UUID BKBSSE-TUGX-KUGI-LIEW-LH5Y-PBZO-KEZVWT

8. Create VG [named DATA_VG]

[Email protected] ~]# vgcreate DATA_VG/DEV/SDB1/DEV/SDC1

Device DATA_VG not found (or ignored by filtering).

Dev_is_mpath:failed to get device for 8:17

Physical volume "/DEV/SDB1" successfully created

Physical volume "/DEV/SDC1" successfully created

[Email protected] ~]# Vgdisplay

---Volume Group---

VG Name DATA_VG

System ID

Format lvm2

Metadata Areas 2

Metadata Sequence No 1

VG Access Read/write

VG Status resizable

MAX LV 0

Cur LV 0

Open LV 0

Max PV 0

Cur PV 2

ACT PV 2

VG Size 20.00 GiB

PE Size 4.00 MiB

Total PE 5120

Alloc pe/size 0/0

Free Pe/size 5120/20.00 GiB

VG UUID LGJTBL-E71I-ASCH-AX01-NBYB-T8YN-OJJ4Z1

9. Divide 16G from the created 20G VG [named DATA_LV]

[Email protected] ~]# lvcreate-l 16g-n data_lv DATA_VG

Logical volume "Data_lv" created

10.16GLV formatted as EXT3 format

[Email protected] ~]# MKFS.EXT3/DEV//DATA_VG/DATA_LV

MKE2FS 1.41.12 (17-may-2010)

File System label =

Operating system: Linux

Block size =4096 (log=2)

Chunked size =4096 (log=2)

Stride=0 blocks, Stripe width=0 blocks

1048576 inodes, 4194304 blocks

209715 blocks (5.00%) reserved for the Super user

First block of data =0

Maximum filesystem blocks=4294967296

Block groups

32768 blocks per group, 32768 fragments per group

8192 inodes per group

Superblock backups stored on blocks:

32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,

4096000

Writing Inode table: complete

Creating Journal (32768 blocks): complete

Writing Superblocks and FileSystem accounting information: Complete

11. Create the/mbox and hang the/data_lv on to/mbox

[Email protected] ~]# Mkdir/mbox

[Email protected] ~]# Mount/dev/data_vg/data_lv/mbox

12. Enter Df-h to view mount information

[Email protected] ~]# df-h

Filesystem Size used Avail use% mounted on

/dev/sda2 97G 4.0G 88G 5%/

Tmpfs 932M 556K 931M 1%/DEV/SHM

/DEV/SDA1 194M 34M 151M 19%/boot

/dev/sda3 97G 188M 92G 1%/data

/dev/sr0 3.6G 3.6G 0 100%/media/rhel_6.5 x86_64 Disc 1

/dev/mapper/data_vg-data_lv 16G 173M 15G 2%/mbox

[Email protected] ~]#

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Linux System Management PV-VG-LV