Radhat Linux 6.3 Partition online expansion

Requirements: The virtual machine needs to expand the hard disk capacity, through the Vcenter Edit resource settings, the original 50G expansion to 100G. But not immediately. The following actions are available:

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After the modified 100G, log in to the virtual machine to view the following:

[Email protected]_test etc]# df-h

Filesystem Size used Avail use% mounted on

/dev/mapper/rootvg-lv_root

45G 7.0G 36G 17%/

Tmpfs 3.9G 88K 3.9G 1%/DEV/SHM

/DEV/SDA1 485M 37M 423M 8%/boot

[Email protected]_test ~]# fdisk-l

DISK/DEV/SDA: 107.4 GB, 107374182400 bytes

255 heads, Sectors/track, 13054 cylinders

Units = Cylinders of 16065 * 8225280 bytes

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

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

Disk identifier:0x000b6327

Device Boot Start End Blocks Id System

/DEV/SDA1 * 1 512000 Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2 6528 51915776 8e Linux LVM

disk/dev/mapper/rootvg-lv_root:49.0 GB, 48997859328 bytes

255 heads, Sectors/track, 5956 cylinders

Units = Cylinders of 16065 * 8225280 bytes

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

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

Disk identifier:0x00000000

disk/dev/mapper/rootvg-lv_swap:4160 MB, 4160749568 bytes

255 heads, Sectors/track, 505 cylinders

Units = Cylinders of 16065 * 8225280 bytes

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

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

Disk identifier:0x00000000

1. The operation steps are as follows:

fdisk-l //view partition list

FDISK/DEV/SDA //partition, divide the Extend partition first, then divide the logical partition. This example is zoned Extand:/dev/sda3, logical partition/DEV/SDA5

M->n, E-W

Fdisk/dev/sda

M->n-L-W

partx-a/DEV/SDA //Add the specified partition or read the disk and add all partitions

Pvcreate/dev/sda5 //Initialize partition

vgextend Rootvg/dev/sda5 //Add the initialized partition to the virtual volume Group ROOTVG (view through Vgdisplay)

lvextend-l +100%free/dev/mapper/rootvg-lv_root //Online expansion of disk space, expansion of/dev/mapper/rootvg-lv_root volume space.

Resize2fs/dev/mapper/rootvg-lv_root //Reset size, expansion/dev/mapper/rootvg-lv_root.

Examples of specific operations are as follows:

[[email protected]_test ~]# fdisk -ldisk /dev/sda: 107.4 gb,  107374182400 bytes255 heads, 63 sectors/track, 13054 cylindersunits =  cylinders of 16065 * 512 = 8225280 bytessector size  (logical/ Physical): 512 bytes / 512 bytesi/o size  (minimum/optimal): 512  bytes / 512 bytesdisk identifier: 0x000b6327   device boot       Start         End       Blocks   Id  System/dev/sda1   *            1           64      512000   83  linuxpartition 1 does  not end on cylinder boundary./dev/sda2               64        6528    51915776    8e  linux lvmdisk /dev/mapper/rootvg-lv_root: 49.0 gb, 48997859328  bytes255 heads, 63 sectors/track, 5956 cylindersunits = cylinders  of 16065 * 512 = 8225280 bytesSector size  (logical/physical):  512 bytes / 512 bytesI/O size  (Minimum/optimal): 512 bytes  / 512 bytesdisk identifier: 0x00000000disk /dev/mapper/rootvg-lv_swap: 4160  mb, 4160749568 bytes255 heads, 63 sectors/track, 505 cylindersunits  = cylinders of 16065 * 512 = 8225280 bytesSector size  (logical/physical):  512 bytes / 512 bytesi/o size  (minimum/optimal):  512 bytes / 512  bytesdisk identifier: 0x00000000

1) Partitioning

[Email protected]_test etc]# FDISK/DEV/SDA

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): N

Command Action

E Extended

P primary partition (1-4)

E

Partition number (1-4): 3

First cylinder (6528-13054, default 6528):

Using Default Value 6528

Last cylinder, +cylinders or +size{k,m,g} (6528-13054, default 13054):

Using Default Value 13054

Command (M for help): W

The partition table has been altered!

Calling IOCTL () to re-read partition table.

Warning:re-reading the partition table failed with error 16:device or resource busy.

The kernel still uses the old table. The new table is being used at

The next reboot or after you run Partprobe (8) or KPARTX (8)

Syncing disks.

[Email protected]_test etc]# FDISK/DEV/SDA

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): N

Command Action

L logical (5 or over)

P primary partition (1-4)

L

First cylinder (6528-13054, default 6528):

Using Default Value 6528

Last cylinder, +cylinders or +size{k,m,g} (6528-13054, default 13054):

Using Default Value 13054

Command (M for help): W

The partition table has been altered!

Calling IOCTL () to re-read partition table.

Warning:re-reading the partition table failed with error 16:device or resource busy.

The kernel still uses the old table. The new table is being used at

The next reboot or after you run Partprobe (8) or KPARTX (8)

Syncing disks.

Partition completion:

[Email protected]_test etc]# fdisk-l

disk/dev/sda:107.4 GB, 107374182400 bytes

255 heads, Sectors/track, 13054 cylinders

Units = Cylinders of 16065 * 8225280 bytes

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

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

Disk identifier:0x000b6327

Device Boot Start End Blocks Id System

/DEV/SDA1 * 1 512000 Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2 6528 51915776 8e Linux LVM

/dev/sda3 6528 13054 52427455 5 Extended

/dev/sda5 6528 13054 52427423+-up Linux

disk/dev/mapper/rootvg-lv_root:49.0 GB, 48997859328 bytes

255 heads, Sectors/track, 5956 cylinders

Units = Cylinders of 16065 * 8225280 bytes

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

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

Disk identifier:0x00000000

disk/dev/mapper/rootvg-lv_swap:4160 MB, 4160749568 bytes

255 heads, Sectors/track, 505 cylinders

Units = Cylinders of 16065 * 8225280 bytes

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

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

Disk identifier:0x00000000

2) Initialize/DEV/SDA5, have the following error prompt, Partx-a/dev/sda, initialize again, OK.

[Email protected]_test etc]# Pvcreate/dev/sda5

Device/dev/sda5 not found (or ignored by filtering).

[Email protected]_test etc]# partx-a/DEV/SDA

Blkpg:device or resource busy

Error adding partition 1

Blkpg:device or resource busy

Error adding partition 2

Blkpg:device or resource busy

Error adding partition 3

[Email protected]_test etc]# Pvcreate/dev/sda5

Writing physical volume data to disk "/dev/sda5"

Physical volume "/DEV/SDA5" successfully created

View VG

[Email protected]_test etc]# vgdisply

---Volume Group---

VG Name ROOTVG

System ID

Format lvm2

Metadata Areas 1

Metadata Sequence No 3

VG Access Read/write

VG Status resizable

MAX LV 0

Cur LV 2

Open LV 2

Max PV 0

Cur PV 1

ACT PV 1

VG Size 49.51 GiB

PE Size 4.00 MiB

Total PE 12674

Alloc pe/size 12674/49.51 GiB

Free Pe/size 0/0

VG UUID 0N5RVO-5UOB-YYM7-HGNP-PG0X-2RPH-AKJPXF

3) Add/dev/sda5 to the Vggroup volume group: ROOTVG.

[Email protected]_test etc]# vgextend Rootvg/dev/sda5

Volume Group "ROOTVG" successfully extended

4) Online expansion of disk space, expansion/dev/mapper/rootvg-lv_root volume space.

[Email protected]_test etc]# lvextend-l +100%free/dev/mapper/rootvg-lv_root

Extending logical Volume Lv_root to 95.63 GiB

Logical Volume Lv_root successfully resized

[Email protected]_test etc]# Pvdisplay

---physical volume---

PV Name/dev/sda2

VG Name ROOTVG

PV Size 49.51 gib/not usable 3.00 MiB

Allocatable Yes (but full)

PE Size 4.00 MiB

Total PE 12674

Free PE 0

Allocated PE 12674

PV UUID UIP0KZ-A3XO-4X0V-P78O-T1E6-ABUC-F0QQR7

---physical volume---

PV Name/dev/sda5

VG Name ROOTVG

PV Size 50.00 gib/not usable 2.66 MiB

Allocatable Yes (but full)

PE Size 4.00 MiB

Total PE 12799

Free PE 0

Allocated PE 12799

PV UUID JIJY54-GSER-NVPU-FEZV-ZVMI-8CRP-M5AFHP

No reset size,

[Email protected]_test etc]# df-h

Filesystem Size used Avail use% mounted on

/dev/mapper/rootvg-lv_root

45G 7.0G 36G 17%/

Tmpfs 3.9G 88K 3.9G 1%/DEV/SHM

/DEV/SDA1 485M 37M 423M 8%/boot

5) Reset Volume size

[Email protected]_test etc]# resize2fs/dev/mapper/rootvg-lv_root

RESIZE2FS 1.41.12 (17-may-2010)

Filesystem at/dev/mapper/rootvg-lv_root is mounted on/; On-line resizing required

Old desc_blocks = 3, new_desc_blocks = 6

Performing an on-line resize of/dev/mapper/rootvg-lv_root to 25068544 (4k) blocks.

The filesystem on/dev/mapper/rootvg-lv_root is now 25068544 blocks long.

view again, has been expanded successfully

[Email protected]_test etc]# df-h

Filesystem Size used Avail use% mounted on

/dev/mapper/rootvg-lv_root

95G 7.0G 83G 8%/

Tmpfs 3.9G 88K 3.9G 1%/DEV/SHM

/DEV/SDA1 485M 37M 423M 8%/boot

[Email protected]_test ~]# fdisk-l

disk/dev/sda:107.4 GB, 107374182400 bytes

255 heads, Sectors/track, 13054 cylinders

Units = Cylinders of 16065 * 8225280 bytes

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

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

Disk identifier:0x000b6327

Device Boot Start End Blocks Id System

/DEV/SDA1 * 1 512000 Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2 6528 51915776 8e Linux LVM

/dev/sda3 6528 13054 52427455 5 Extended

/dev/sda5 6528 13054 52427423+-up Linux

disk/dev/mapper/rootvg-lv_root:102.7 GB, 102680756224 bytes

255 heads, Sectors/track, 12483 cylinders

Units = Cylinders of 16065 * 8225280 bytes

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

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

Disk identifier:0x00000000

disk/dev/mapper/rootvg-lv_swap:4160 MB, 4160749568 bytes

255 heads, Sectors/track, 505 cylinders

Units = Cylinders of 16065 * 8225280 bytes

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

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

Disk identifier:0x00000000

[[Email Protected]_test ~]#

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Radhat Linux 6.3 partition online expansion