1、mkfs命令格式化分区报错信息：
计算
安全
数据库
网络和加速
企业服务
[root@localhost ~]# mkfs -t ext4 /dev/sdb7
mke2fs 1.42.9 (28-Dec-2013)
Could not stat /dev/sdb7 --- No such file or directory
The device apparently does not exist; did you specify it correctly?2、解决方法：
第一步：安装parted包
先检查系统中是否安装parted包
[root@localhost ~]# rpm -q parted
parted-3.1-29.el7.x86_64 安装parted包命令
yum -y install parted 或 rpm -ivh parted-3.1-29.el7.x86_64.rpm
第二步：执行partprobe命令
[root@localhost ~]# partprobe
Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only. 第三步：重新格式化分区
[root@localhost ~]# mkfs -t ext4 /dev/sdb7
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
131072 inodes, 524288 blocks
26214 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=536870912
16 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912
Allocating group tables: done
Writing inode tables: done
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information: done 第四步：用blkid命令查看分区是否格式化成功
[root@localhost ~]# blkid -s TYPE
/dev/sda1: TYPE="xfs"
/dev/sda2: TYPE="LVM2_member"
/dev/sdb5: TYPE="xfs"
/dev/sr0: TYPE="iso9660"
/dev/mapper/rhel-root: TYPE="xfs"
/dev/mapper/rhel-swap: TYPE="swap"
/dev/sdb7: TYPE="ext4" #显示/dev/sdb7分区格式化成功亿速云「云服务器」，即开即用、新一代英特尔至强铂金CPU、三副本存储NVMe SSD云盘，价格低至29元/月。点击查看>>
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