fdisk创建分区
[root@centos8 ~]# fdisk /dev/sdb
Welcome to fdisk (util-linux 2.32.1).
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.
Created a new DOS disklabel with disk identifier 0x127ea212.
#打印当前情况
Command (m for help): p
Disk /dev/sdb: 20 GiB, 21474836480 bytes, 41943040 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
Disklabel type: dos
Disk identifier: 0x127ea212
#创建新分区
Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
#创建扩展分区
Select (default p): e
Partition number (1-4, default 1): 3
First sector (2048-41943039, default 2048):
Last sector, +sectors or +size{K,M,G,T,P} (2048-41943039, default 41943039): +2G
Created a new partition 3 of type 'Extended' and of size 2 GiB.
#创建新分区
Command (m for help): n
Partition type
p primary (0 primary, 1 extended, 3 free)
l logical (numbered from 5)
#创建主分区
Select (default p): p
Partition number (1,2,4, default 1): 2
First sector (4196352-41943039, default 4196352):
Last sector, +sectors or +size{K,M,G,T,P} (4196352-41943039, default 41943039): +2G
Created a new partition 2 of type 'Linux' and of size 2 GiB.
#打印当前情况
Command (m for help): p
Disk /dev/sdb: 20 GiB, 21474836480 bytes, 41943040 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
Disklabel type: dos
Disk identifier: 0x127ea212
Device Boot Start End Sectors Size Id Type
/dev/sdb2 4196352 8390655 4194304 2G 83 Linux
/dev/sdb3 2048 4196351 4194304 2G 5 Extended
Partition table entries are not in disk order.
#创建新分区
Command (m for help): n
Partition type
p primary (1 primary, 1 extended, 2 free)
l logical (numbered from 5)
#创建主分区
Select (default p): p
Partition number (1,4, default 1): 4
First sector (8390656-41943039, default 8390656):
Last sector, +sectors or +size{K,M,G,T,P} (8390656-41943039, default 41943039): +2G
Created a new partition 4 of type 'Linux' and of size 2 GiB.
#创建新分区
Command (m for help): n
Partition type
p primary (2 primary, 1 extended, 1 free)
l logical (numbered from 5)
#创建逻辑分区
Select (default p): l
Adding logical partition 5
First sector (4096-4196351, default 4096):
Last sector, +sectors or +size{K,M,G,T,P} (4096-4196351, default 4196351): +100M
Created a new partition 5 of type 'Linux' and of size 100 MiB.
#创建新分区
Command (m for help): n
Partition type
p primary (2 primary, 1 extended, 1 free)
l logical (numbered from 5)
#创建逻辑分区
Select (default p): l
Adding logical partition 6
First sector (210944-4196351, default 210944):
Last sector, +sectors or +size{K,M,G,T,P} (210944-4196351, default 4196351): +200M
Created a new partition 6 of type 'Linux' and of size 200 MiB.
#打印当前情况
Command (m for help): p
Disk /dev/sdb: 20 GiB, 21474836480 bytes, 41943040 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
Disklabel type: dos
Disk identifier: 0x127ea212
Device Boot Start End Sectors Size Id Type
/dev/sdb2 4196352 8390655 4194304 2G 83 Linux
/dev/sdb3 2048 4196351 4194304 2G 5 Extended
/dev/sdb4 8390656 12584959 4194304 2G 83 Linux
/dev/sdb5 4096 208895 204800 100M 83 Linux
/dev/sdb6 210944 620543 409600 200M 83 Linux
Partition table entries are not in disk order.
#创建新分区
Command (m for help): n
Partition type
p primary (2 primary, 1 extended, 1 free)
l logical (numbered from 5)
#创建主分区
Select (default p): p
Selected partition 1
First sector (12584960-41943039, default 12584960):
Last sector, +sectors or +size{K,M,G,T,P} (12584960-41943039, default 41943039): +2G
Created a new partition 1 of type 'Linux' and of size 2 GiB.
#打印当前情况
Command (m for help): p
Disk /dev/sdb: 20 GiB, 21474836480 bytes, 41943040 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
Disklabel type: dos
Disk identifier: 0x127ea212
Device Boot Start End Sectors Size Id Type
/dev/sdb1 12584960 16779263 4194304 2G 83 Linux #4
/dev/sdb2 4196352 8390655 4194304 2G 83 Linux #2
/dev/sdb3 2048 4196351 4194304 2G 5 Extended #1
/dev/sdb4 8390656 12584959 4194304 2G 83 Linux #3
/dev/sdb5 4096 208895 204800 100M 83 Linux #1-1
/dev/sdb6 210944 620543 409600 200M 83 Linux #1-2
Partition table entries are not in disk order.
#保存退出
Command (m for help):w
gdisk创建分区和以上类似
对现有磁盘进行分区之后不同步的问题
#除CentOS6以外
partprobe
#CentOS6(增加用a,删除用d)
partx -a /dev/sda
非交互式创建分区
echo -e 'n\np\n\n+2G\nw\n'|fdisk /dev/sdc
