Expand hard disk space process records for CENTOS7 in VMware virtual machines

expand Hard disk space process records for CENTOS7 in VMware virtual machines

Reference Links:

http://blog.csdn.net/remote_roamer/article/details/50670802

Http://www.cnblogs.com/juandx/p/5618162.html

1. Turn off virtual machines, virtual machine settings, disk utilities--Extensions

The original Linux HDD only 30G, extended to 100G

2. Partition and format the newly added hard drive

2.1 Partitioning The newly added hard drive

Input command: FDISK/DEV/SDA (because the above selection is an extension, that is, in the original hard disk SDA expansion, so the space to increase the hard disk is/DEV/SDA)

Follow the prompts to enter:

[root@centos7dev~]# FDISK/DEV/SDA

Welcome to Fdisk (Util-linux 2.23.2).

Changes'll remainin memory only, until you decide to write them.

Be careful beforeusing the write command.

Command (M for help):p (View the number of partitions with two/dev/sda1/dev/sda2))

DISK/DEV/SDA:107.4GB, 107374182400 bytes, 209715200 sectors

Units = sectors of 1* = bytes

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

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

Disk label Type:dos

Disk identifier:0x0003f424

Device Boot Start End Blocks Id System

/DEV/SDA1 * 2048 1026047 512000 Linux

/dev/sda2 1026048 62914559 30944256 8e Linux LVM (original 30G HDD)

Command (M for help): N (add a new partition)

Partition Type:

P Primary (2 primary, 0 extended, 2 free)

E Extended

Select (Default p):p (partition type selected as primary partition)

Partition Number (3,4, default 3):3 (3 of the area code)

First sector (62914560-209715199, default 62914560): Entre (enter, select default Start Sector)

Using default value62914560

Last sector, +sectors or +size{k,m,g} (62914560-209715199, default209715199): Entre (enter, select default End sector)

Using default value209715199

Partition 3 of Typelinux and of size the GiB is set

Command (M for help):t (t modify partition Type)

Partition Number (1-3, default 3):3 (select partition 3)

Hex Code (type L to list all codes):8e (modified to LVM (8es is the ID found above p option) LVM is Logicalvolume Manager (logical Volume management))

Changed type ofpartition ' Linux ' to ' Linux LVM '

Command (M for help):W (Save)

The partition Tablehas been altered!

Calling IOCTL () tore-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 would be Usedat

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

Syncing disks.

[root@centos7dev~]# Partprobe (according to the above prompt input)

[root@centos7dev~]# reboot (restart Linux)

2.2 To format the newly added hard drive

After restarting the Linux format partition: mkfs.xfs/dev/sda3(Sda3 is the area just divided, also note : The format of what file system to use the df-th command to first see what your current Linux system uses the file system, What I'm looking at here is printed:

Filesystem Type Size used Avail use% mounted on

/dev/mapper/centos-root xfs 28G 12G 17G 42%/

So use the MKFS.XFS command

2.3. Add new LVM to existing LVM group for capacity expansion

LVM into LVM management:

Lvm> Pvcreate/dev/sda3 Initialize the partition just now

lvm> Vgdisplay View Volume Group (volumegroup) name

---volumegroup---

Vgname CentOS

... ... ...

Lvm> vgextend Centos/dev/sda3 Add the initialized partition to the virtual volume group centos

Lvm> Lvdisplay View the Logical volume (Logical volume), you can see the new 70G logical volume

---physical volume---

PV Name/dev/sda2

VG Name CentOS

PV Size 29.51 gib/not usable 3.00 MiB

Allocatable Yes

... ... ...

"/dev/sda3" is a new physicalvolume of "70.00 GiB"

---NEW physical volume---

PV Name/dev/sda3

VG Name

PV Size 70.00 GiB

Allocatable NO

... ... ...

Lvm> lvextend-l +70g/dev/centos/root Add the physical volume to the root directory, from the print information above you can see that the root directory is in the/dev/centos/root

3. The above is only the volume expansion, the following is the real expansion of the file system, enter the following command:

Xfs_growfs/dev/mapper/centos-root

4. Results View

[root@centos7dev~]# df-h

Filesystem Size used Avail use% mounted on

/dev/mapper/centos-root 97G 12G 86G 12%/

...