1. Add a hard disk, formatted partition, loading
[root@localhost ~]# fdisk /dev/sdb
[root@localhost ~]# mkfs.ext4 /dev/sdb1
[root@localhost ~]# mkdir /disk
[root@localhost ~]# mount /dev/sdb1 /disk/
[root@localhost ~]# df –I
Inode file system is used (I) can be used (I) has a mount point (I)%
/dev/sdb1 65536 10 65526 1% /disk
Second, to create multiple files, run out of capacity
[root@localhost ~]# cd /disk/
[root@localhost disk]# touch {1..65526}
Third, the occupancy verification file
[root@localhost ~]# df -i
Inode file system is used (I) can be used (I) has a mount point (I)%
/dev/sdb1 65536 65536 0 100% /disk
3> try to create a file
[root@localhost disk]# touch q
touch: Unable to create "q": there is no space left on device
4> View disk space
[root@localhost ~]# df -hT /disk/
File system type available capacity has been used with a mount point%
/dev/sdb1 ext4 976M 4.3M 905M 1% /disk
Fourth, repair disk depleted failure
[Root @ localhost ~] # mv important data / root
[root@localhost ~]#umount /dev/sdb1
[root@localhost ~]#mkfs.ext4 /dev/sdb1
[root@localhost ~]# df -i /dev/sdb1
Inode file system is used (I) can be used (I) has a mount point (I)%
/dev/sdb1 65536 11 65525 1% /disk
[root@localhost ~]# mount /dev/sdb1 /disk/
[Root @ localhost ~] # mv important data / disk