Linux Logical Volume creation

1. Create a PV physical volume
[Email protected] ~]# PVCREATE/DEV/SDA4/DEV/SDA5/DEV/SDA6/DEV/SDA7
Physical volume "/DEV/SDA4" successfully created
Physical volume "/DEV/SDA5" successfully created
Physical volume "/dev/sda6" successfully created
Physical volume "/DEV/SDA7" successfully created

2. Create a VG volume group
[Email protected] ~]# vgcreate VG_DATA/DEV/SDA4/DEV/SDA5/DEV/SDA6/DEV/SDA7
Volume Group "Vg_data" successfully created

3. View Volume Group information
[Email protected] ~]# Vgdisplay
-volume group-
VG Name Vg_data
System ID
Format lvm2
Metadata Areas 4
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 4
ACT PV 4
VG Size 3.00 TiB
PE Size 4.00 MiB
Total PE 787436
Alloc pe/size 0/0
Free Pe/size 787436/3.00 TiB
VG UUID ee9ybc-nwcj-zqea-o4vs-o2jk-3m9a-y8br8r

3. Create a logical volume according to the PE size
Lvcreate-l 787436-n Lv_data Vg_data

4. Formatting logical Volumes
Mkfs.ext4/dev/mapper/vg_data-lv_data

5. View the logical volume UUID
[Email protected] ~]# Blkid
/dev/sda2:uuid= "Fc5f54a3-f6c9-49bd-8dd2-a536de2b8370″type=" Ext4″
/dev/sda1:sec_type= "Msdos" uuid= "99fb-7635″type=" VFAT "
/dev/sda3:uuid= "3e5deca5-7b13-4630-83bd-97223a796e2d" type= "swap"
/dev/sda4:uuid= "Ikfv7k-nmgt-y99g-ac8i-uylb-e3f0-6ddvjl" type= "Lvm2_member"
/dev/sda5:uuid= "68t2lx-njss-texe-gjir-giqw-hbr1-meaweb" type= "Lvm2_member"
/dev/sda6:uuid= "0LH7H8-NPIS-J2ZW-VZR9-3E2G-0T7K-MAQDLM" type= "Lvm2_member"
/dev/sda7:uuid= "WLAFSQ-SZND-TD7S-B8OS-S7SN-PDP1-RXYVDX" type= "Lvm2_member"
/dev/mapper/vg_data-lv_data:uuid= "7d816a72-1797-4746-b48b-594ffa954fe4″type=" Ext4″

6. Create a mount Directory
Mkdir/u01

7. Write/etc/fstab
UUID=7D816A72-1797-4746-B48B-594FFA954FE4/U01 EXT4 Defaults 1 2

8. Mounting the file system
Mount-a

9. Verify the results
[Email protected] ~]# df-h
Filesystem Size used Avail use% mounted on
/dev/sda2 753G 2.5G 713G 1%/
Tmpfs 32G 72K 32G 1%/DEV/SHM
/DEV/SDA1 200M 260K 200M 1%/boot/efi
/dev/mapper/vg_data-lv_data
3.0T 200M 2.9T 1%/u01

10. Delete the logical volume (for new creation)
[Email protected] ~]# lvremove/dev/mapper/vg_data-lvol0
Do you really want to remove active logical volume LVOL0? [y/n]: Y
Logical volume "lvol0" successfully removed

Linux Logical Volume creation