centos7 添加硬盘和分区


首先查看系统中的硬盘

[root@svnhost ~]# fdisk -l

Disk /dev/sda: 120.0 GB, 120034123776 bytes, 234441648 sectors

Units = sectors of 1 * 512 = 512 bytes

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

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

Disk label type: dos

Disk identifier: 0x00033922

Device Boot Start End Blocks Id System

/dev/sda1 * 2048 1026047 512000 83 Linux

/dev/sda2 1026048 234440703 116707328 8e Linux LVM

Disk /dev/mapper/centos-root: 53.7 GB, 53687091200 bytes, 104857600 sectors

Units = sectors of 1 * 512 = 512 bytes

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

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

Disk /dev/mapper/centos-swap: 12.0 GB, 12004098048 bytes, 23445504 sectors

Units = sectors of 1 * 512 = 512 bytes

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

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

Disk /dev/sdb: 1999.8 GB, 1999844147200 bytes, 3905945600 sectors

Units = sectors of 1 * 512 = 512 bytes

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

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

Disk /dev/mapper/centos-home: 53.8 GB, 53750005760 bytes, 104980480 sectors

Units = sectors of 1 * 512 = 512 bytes

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

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

系统中有2块盘/dev/sda和/dev/sdb. /dev/sda已经做好分区。下面对/dev/sdb做分区

[root@svnhost ~]# fdisk /dev/sdb

Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.

Be careful before using the write command.

Device does not contain a recognized partition table

Building a new DOS disklabel with disk identifier 0x8626c507.

Command (m for help): m

Command action

a toggle a bootable flag

b edit bsd disklabel

c toggle the dos compatibility flag

d delete a partition

g create a new empty GPT partition table

G create an IRIX (SGI) partition table

l list known partition types

m print this menu

n add a new partition

o create a new empty DOS partition table

p print the partition table

q quit without saving changes

s create a new empty Sun disklabel

t change a partition's system id

u change display/entry units

v verify the partition table

w write table to disk and exit

x extra functionality (experts only)

Command (m for help): n //新建主分区

Partition type:

p primary (0 primary, 0 extended, 4 free)

e extended

Select (default p):

Using default response p

Partition number (1-4, default 1):

First sector (2048-3905945599, default 2048):

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-3905945599, default 3905945599): +500G //输入分区大小

Partition 1 of type Linux and of size 500 GiB is set

Command (m for help): p //打印分区

Disk /dev/sdb: 1999.8 GB, 1999844147200 bytes, 3905945600 sectors

Units = sectors of 1 * 512 = 512 bytes

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

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

Disk label type: dos

Disk identifier: 0x8626c507

Device Boot Start End Blocks Id System

/dev/sdb1 2048 1048578047 524288000 83 Linux

Command (m for help): n

Partition type:

p primary (1 primary, 0 extended, 3 free)

e extended

Select (default p):

Using default response p

Partition number (2-4, default 2):

First sector (1048578048-3905945599, default 1048578048):

Using default value 1048578048

Last sector, +sectors or +size{K,M,G} (1048578048-3905945599, default 3905945599): +500G

Partition 2 of type Linux and of size 500 GiB is set

Command (m for help): p

Disk /dev/sdb: 1999.8 GB, 1999844147200 bytes, 3905945600 sectors

Units = sectors of 1 * 512 = 512 bytes

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

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

Disk label type: dos

Disk identifier: 0x8626c507

Device Boot Start End Blocks Id System

/dev/sdb1 2048 1048578047 524288000 83 Linux

/dev/sdb2 1048578048 2097154047 524288000 83 Linux

Command (m for help): n //新建扩展分区

Partition type:

p primary (2 primary, 0 extended, 2 free)

e extended

Select (default p): e

Partition number (3,4, default 3):

First sector (2097154048-3905945599, default 2097154048):

Using default value 2097154048

Last sector, +sectors or +size{K,M,G} (2097154048-3905945599, default 3905945599):

Using default value 3905945599

Partition 3 of type Extended and of size 862.5 GiB is set

Command (m for help): p

Disk /dev/sdb: 1999.8 GB, 1999844147200 bytes, 3905945600 sectors

Units = sectors of 1 * 512 = 512 bytes

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

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

Disk label type: dos

Disk identifier: 0x8626c507

Device Boot Start End Blocks Id System

/dev/sdb1 2048 1048578047 524288000 83 Linux

/dev/sdb2 1048578048 2097154047 524288000 83 Linux

/dev/sdb3 2097154048 3905945599 904395776 5 Extended

Command (m for help): n //新建逻辑分区

Partition type:

p primary (2 primary, 1 extended, 1 free)

l logical (numbered from 5)

Select (default p): l

Adding logical partition 5

First sector (2097156096-3905945599, default 2097156096):

Using default value 2097156096

Last sector, +sectors or +size{K,M,G} (2097156096-3905945599, default 3905945599):

Using default value 3905945599

Partition 5 of type Linux and of size 862.5 GiB is set

Command (m for help): p

Disk /dev/sdb: 1999.8 GB, 1999844147200 bytes, 3905945600 sectors

Units = sectors of 1 * 512 = 512 bytes

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

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

Disk label type: dos

Disk identifier: 0x8626c507

Device Boot Start End Blocks Id System

/dev/sdb1 2048 1048578047 524288000 83 Linux

/dev/sdb2 1048578048 2097154047 524288000 83 Linux

/dev/sdb3 2097154048 3905945599 904395776 5 Extended

/dev/sdb5 2097156096 3905945599 904394752 83 Linux

Command (m for help): w //写入新的分区表

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

创建文件系统

[root@svnhost ~]# mkfs -t ext3 /dev/sdb1

[root@svnhost /]# mkfs -t ext3 /dev/sdb2

[root@svnhost /]# mkfs -t ext3 /dev/sdb5

编辑系统文件

[root@svnhost /]#vi /etc/fstab

添加：

/dev/sdb1 /u01 ext3 defaults 0 0

/dev/sdb2 /u02 ext3 defaults 0 0

/dev/sdb5 /u03 ext3 defaults 0 0

至此，新建的硬盘分区在系统重启时就会自动挂载。