How Linux disks extend the LVM format without damaging the data

Mode: LVM mode

The first step is to increase the partition:
1, vm-> edit settings, disk expansion under the Disk (menu operation no longer redundant).
2. Use the FDISK command
Fdisk/dev/sda
# Use the n command to build a P-type disk, and then change the ID to 8e (LVM category) with the T command.
# p Check:
disk/dev/sda:17.1 GB, 17179869184 bytes
255 heads, Sectors/track, 2088 cylinders
Units = Cylinders of 16065 * 8225280 bytes

Device Boot Start End Blocks Id System
/DEV/SDA1 * 1 104391 Linux
/dev/sda2 1044 8281507+ 8e Linux LVM
/dev/sda3 1045 1545 4024282+ 8e Linux LVM
Last W Save
3, restart the server, or not mount the new Sda3, SDA4,

The second step is to add VLM:
Root#mkfs.ext3/dev/sda3 # #格式化新增的分区)

Root#lvm
Lvm>pvcreate/dev/sda3 # #创建LVM硬分区
Physical volume "/dev/sda3" successfully created
lvm> vgextend Volgroup00/dev/sda3 # #加入与/directory with one LVM group
Volume Group "VolGroup00" successfully extended
Take a look:
Lvm>pvdisplay
---physical volume---
PV Name/dev/sda2
VG Name VolGroup00
PV Size 7.90 gb/not usable 23.41 MB
Allocatable Yes (but full)
PE Size (KByte) 32768
Total PE 252
Free PE 0
Allocated PE 252
PV UUID UA5FJN-JSLL-BGKP-W0XO-N8JG-MBR0-1YDZGW

---physical volume---
PV Name/dev/sda3
VG Name VolGroup00
PV Size 3.84 gb/not usable 25.96 MB
Allocatable Yes
PE Size (KByte) 32768
Total PE 122
Free PE 122
Allocated PE 0
PV UUID mhkwzk-mq1o-jkqb-0dzc-pvqw-w2r9-14y19g
Virtual disk that turns Sda3 into LVM (the key to increasing capacity)
Lvm>vgextend/dev/volgroup00/logvol102/dev/sda3
Third Step Add/catalog capacity
Lvm> lvextend-l +3.8g/dev/volgroup00/logvol00
Rounding up size to full physical extent 3.81 GB
Extending logical Volume LogVol00 to 9.69 GB
Logical Volume LogVol00 successfully resized
# resize2fs/dev/volgroup00/logvol00 # #还要重新一下识别磁盘容量
RESIZE2FS 1.39 (29-may-2006)
Filesystem at/dev/volgroup00/logvol00 is mounted on/; On-line resizing required
Performing an on-line resize of/dev/volgroup00/logvol00 to 2539520 (4k) blocks.
The filesystem on/dev/volgroup00/logvol00 is now 2539520 blocks long.

Final Confirmation Result:
Lvm> Lvdisplay
---Logical volume---
LV name/dev/volgroup00/logvol00
VG Name VolGroup00
LV UUID r9eg4x-njbd-z2ht-lml2-2l81-p3xv-kvd0e4
LV Write Access Read/write
LV Status Available
# open 1
LV Size 9.69 GB
Current LE 310
Segments 2
Allocation inherit
Read ahead Sectors Auto
-Currently set to 256
Block Device 253:0

Add a new hard drive

1. Before adding a VM, and then editing the VM properties, adding a vritual disk (SCSI), is actually adding a vdisk file.

Hard Disk2 is my new addition.

2. View the current disk structure

[Email protected] ~]# fdisk-l

disk/dev/sda:10.7 GB, 10737418240 bytes
255 heads, Sectors/track, 1305 cylinders
Units = Cylinders of 16065 * 8225280 bytes

Device Boot Start End Blocks Id System
/DEV/SDA1 * 1 104391 Linux
/dev/sda2 905 7164990 Linux

disk/dev/sdb:1073 MB, 1073741824 bytes
255 heads, Sectors/track, cylinders
Units = Cylinders of 16065 * 8225280 bytes

Disk/dev/sdb doesn ' t contain a valid partition table
Description Disk/dev/sdb is not yet recognized by the system

3. Partition

[Email protected] ~]# FDISK/DEV/SBD

Command (M for Assist): N//input m get help information, n create partition
Command Action
E Extended
P primary partition (1-4)
P//Create primary partition
Partition number (1-4): 1//Specify the starting cylinder of the partition
First cylinder (1-130, default 1):
Using Default value 1
Last cylinder or +size or +sizem or +sizek (1-130, default 130)://Set partition capacity, direct carriage return means all
Using Default Value 130

Command (M for help): t//change the system ID of a partition
Selected partition 1
Hex Code (Type L to list codes): L//view hex for file type

Extended//linux ext3 hex of Linux is 85

Hex code (type L to list codes): 85
Cannot change a partition to an extended one or vice versa
Delete it first.

Command (M for help): P//Lists the partition of the current hard disk

disk/dev/sdb:1073 MB, 1073741824 bytes
255 heads, Sectors/track, cylinders
Units = Cylinders of 16065 * 8225280 bytes

Device Boot Start End Blocks Id System
/DEV/SDB1 1 1044193+ Linux

Command (M for help): w//Save
The partition table has been altered!

Calling IOCTL () to re-read partition table.
Syncing disks.

4. View the current partition

[Email protected] ~]# fdisk-l

disk/dev/sda:10.7 GB, 10737418240 bytes
255 heads, Sectors/track, 1305 cylinders
Units = Cylinders of 16065 * 8225280 bytes

Device Boot Start End Blocks Id System
/DEV/SDA1 * 1 104391 Linux
/dev/sda2 905 7164990 Linux

disk/dev/sdb:1073 MB, 1073741824 bytes
255 heads, Sectors/track, cylinders
Units = Cylinders of 16065 * 8225280 bytes

Device Boot Start End Blocks Id System
/DEV/SDB1 1 1044193+ Linux

5. formatting partitions

[[email protected] ~]# MKFS.EXT3/DEV/SDB1//format into EXT3 format

6. Mount Partition

[Email protected] ~]# mount/dev/sdb1/tmp
[Email protected] ~]# DF-H/tmp
Filesystem Size used Avail use% mounted on
/DEV/SDB1 1004M 1.3M 952M 1%/tmp

7. Auto Mount

Modify/etc/fstab

Add a row

/DEV/SDB1/SDB1 ext3 defaults 0 0
Re-up

This article is from the "Technical Achievement Dream" blog, please be sure to keep this source http://pizibaidu.blog.51cto.com/1361909/1641695

How Linux disks extend the LVM format without damaging the data