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This article introduces the relevant knowledge of "what is the method of expanding hard disk in linux system VPS". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

[root@cloud ~] # df-hal to view the disk status after capacity expansion.

File system capacity used available mount point% used

/ dev/mapper/vg_cloud-lv_root

7.5g 7.5g 0 100% /

Proc 0 000-/ proc

Sysfs 0 000-/ sys

Devpts 0 000-/ dev/pts

Tmpfs 494m 0 494m 0% / dev/shm

/ dev/sda1 485M 33M 427M 8% / boot

None 0 000-/ proc/sys/fs/binfmt_misc

Sunrpc 0 000-/ var/lib/nfs/rpc_pipefs

[root@cloud wwwroot] # fdisk-l to view partitions. You can see here that / dev/sdc is the disk that you just added without partition.

Disk / dev/sda: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

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

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

Disk identifier: 0x00051f5f

Device Boot Start End Blocks Id System

/ dev/sda1 * 1 64 512000 83 Linux

Partition 1 does not end on cylinder boundary.

/ dev/sda2 64 1306 9972736 8e Linux LVM

Disk / dev/sdb: 53.7 GB, 53687091200 bytes

255 heads, 63 sectors/track, 6527 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

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

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

Disk identifier: 0x00000000

Disk / dev/mapper/vg_cloud-lv_root: 8128 MB, 8128561152 bytes

255 heads, 63 sectors/track, 988 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

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

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

Disk identifier: 0x00000000

Disk / dev/mapper/vg_cloud-lv_swap: 2080 MB, 2080374784 bytes

255 heads, 63 sectors/track, 252 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

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

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

Disk identifier: 0x00000000

[root@cloud ~] # fdisk / dev/sdb for partition. Fdisk partitioning the hard disk is essentially a kind of formatting of the hard disk.

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklable

Building a new DOS disklabel with disk identifier 0x3c59d1a9.

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): n # New partition

Command action

E extended

P primary partition (1-4)

P # set the primary partition

Partition number (1-4): 1 # main partition number

First cylinder (1-2610, default 1): 1 # start sector (direct default enter)

Using default value 1

Last cylinder, + cylinders or + size {KMagne Mpeng} (1-2610, default 2610): 2610

Using default value 2610 # end sector (direct default enter)

Command (m for help): t # specifies the partition type

Selected partition 1 # Select Partition 1

Hex code (type L to list codes): 8e # 8e is LVM

Changed system type of partition 1 to 8e (Linux LVM)

Command (m for help): W # Save

The partition table has been altered!

Calling ioctl () to re-read partition table.

Syncing disks.

[root@cloud ~] # reboot

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Rebooting

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[root@cloud ~] # vgs

VG # PV # LV # SN Attr VSize VFree

Vg_cloud 1 2 0 wz--n- 9.51g 0

[root@cloud ~] # pvcreate / dev/sdb1

Physical volume "/ dev/sdb1" successfully created

[root@cloud ~] # vgextend vg_cloud / dev/sdb1

Volume group "vg_cloud" successfully extended

[root@cloud ~] # vgdisplay

-Volume group

VG Name vg_cloud

System ID

Format lvm2

Metadata Areas 2

Metadata Sequence No 4

VG Access read/write

VG Status resizable

MAX LV 0

Cur LV 2

Open LV 2

Max PV 0

Cur PV 2

Act PV 2

VG Size 59.50 GiB

PE Size 4.00 MiB

Total PE 15233

Alloc PE / Size 2434 / 9.51 GiB

Free PE / Size 12799 / 50.00 GiB

VG UUID I5k6GO-mjni-7dO0-O4TF-RUxH-RNcI-bnWFY3

[root@cloud] # lvresize-L + 49.900G / dev/vg_cloud/lv_root

Rounding size to boundary between physical extents: 49.90 GiB

Extending logical volume lv_root to 57.47 GiB

Logical volume lv_root successfully resized

[root@cloud ~] # resize2fs / dev/vg_cloud/lv_root

Resize2fs 1.41.12 (17-May-2010)

Filesystem at / dev/vg_cloud/lv_root is mounted on /; on-line resizing required

Old desc_blocks = 1, new_desc_blocks = 4

Performing an on-line resize of / dev/vg_cloud/lv_root to 15066112 (4k) blocks.

The filesystem on / dev/vg_cloud/lv_root is now 15066112 blocks long.

[root@cloud ~] # df-hal

File system capacity used available mount point% used

/ dev/mapper/vg_cloud-lv_root

57G 7.5g 47G 14% /

Proc 0 000-/ proc

Sysfs 0 000-/ sys

Devpts 0 000-/ dev/pts

Tmpfs 494m 0 494m 0% / dev/shm

/ dev/sda1 485M 33M 427M 8% / boot

None 0 000-/ proc/sys/fs/binfmt_misc

Sunrpc 0 000-/ var/lib/nfs/rpc_pipefs

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Expand successfully

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