1.磁盘分区
fdisk /dev/sda2
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 0x574721c3.
2.添加新的分区
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-39843839, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-39843839, default 39843839): +1G
Partition 1 of type Linux and of size 1 GiB is set
3.保存并退出
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 22: Invalid argument.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
4.查看磁盘分区是否成功
fdisk -l /dev/sda2
Disk /dev/sda2: 20.4 GB, 20400046080 bytes, 39843840 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: 0x574721c3
Device Boot Start End Blocks Id System
/dev/sda2p1 2048 2099199 1048576 83 Linux
5.读取指定硬盘分区
partprobe /dev/sda2
Error: Partition(s) 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64 on /dev/sda2 have been written, but we have been unable to inform the kernel of the change, probably because it/they are in use. As a result, the old partition(s) will remain in use. You should reboot now before making further changes.
bash-4.2# mkfs.ext4 /dev/sdb1
mke2fs 1.42.9 (28-Dec-2013)
Could not stat /dev/sdb1 --- No such file or directory
6.格式化分区
mkfs.ext4 /dev/sdb1
mke2fs 1.42.9 (28-Dec-2013)
Could not stat /dev/sdb1 --- No such file or directory
7.创建挂载目录
mkdir /zhangxiang
8.挂载
mount /dev/sdb1 /zhangxiang
标签：512,default,partition,dev,table,磁盘分区 From： https://www.cnblogs.com/zhangxiang1/p/17019664.html