#取消挂载[root@localhost /]# umount /optumount: /opt: device is busy. (In some cases useful info
#取消挂载[root@localhost /]# umount /optumount: /opt: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1))#强制取消挂载[root@localhost /]# umount /opt -fumount2: 设备或资源忙umount: /opt: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1))umount2: 设备或资源忙#查看哪些进程占用该文件夹[root@localhost /]# fuser -m /opt/opt: 189688c189820c190111c190117c#杀掉[root@localhost /]# kill -9 189688 189820 190111 190117[root@localhost /]# fuser -m /opt[root@localhost /]# umount /opt#mke2fs: inode数量小于 2^32 = 4294967296[root@localhost /]# mke2fs -O 64bit,has_journal,extents,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize -i 4194304 /dev/sdb -N 4294967295mke2fs 1.43.3 (04-Sep-2016) /dev/sdb 有一个 ext4 文件系统 创建含有 7324216320 个块（每块 4k）和 4291545600 个inode的文件系统文件系统UUID：db805a53-64a2-46d4-9f92-38e97c99e092超级块的备份存储于下列块： 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 102400000, 214990848, 512000000, 550731776, 644972544, 1934917632, 2560000000, 3855122432, 5804752896正在分配组表： 完成 正在写入inode表： 完成 创建日志（262144 个块）完成写入超级块和文件系统账户统计信息： 已完成 [root@localhost /]# mkdir /opt/disk[root@localhost /]# chown -R nwom:nwom /opt/disk[root@localhost /]# vi /etc/fstab ## /etc/fstab# Created by anaconda on Thu Sep 1 21:10:23 2016## Accessible filesystems, by reference, are maintained under '/dev/disk'# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info#/dev/mapper/VolGroup-lv_root / ext4 defaults 1 1UUID=472161e5-934c-4fe0-8a0c-8108c6504287 /boot ext4 defaults 1 2/dev/mapper/VolGroup-lv_home /home ext4 defaults 1 2/dev/mapper/VolGroup-lv_swap swap swap defaults 0 0tmpfs /dev/shm tmpfs defaults 0 0devpts /dev/pts devpts gid=5,mode=620 0 0sysfs /sys sysfs defaults 0 0proc /proc proc defaults 0 0/dev/sdb /opt ext4 defaults 1 2[root@localhost /]# mount /dev/sdb /opt/disk[root@localhost /]# df -hFilesystem Size Used Avail Use% Mounted on/dev/mapper/VolGroup-lv_root 50G 4.6G 43G 10% /tmpfs 48G 228K 48G 1% /dev/shm/dev/sda1 485M 40M 420M 9% /boot/dev/mapper/VolGroup-lv_home 221G 13G 198G 6% /home/dev/sdb 27T 1.1G 25T 1% /opt[root@localhost /]# df -iaFilesystem Inodes IUsed IFree IUse% Mounted on/dev/mapper/VolGroup-lv_root 3276800 115048 3161752 4% /proc 0 0 0 - /procsysfs 0 0 0 - /sysdevpts 0 0 0 - /dev/ptstmpfs 12376269 6 12376263 1% /dev/shm/dev/sda1 128016 39 127977 1% /boot/dev/mapper/VolGroup-lv_home 14680064 40378 14639686 1% /homenone 0 0 0 - /proc/sys/fs/binfmt_miscgvfs-fuse-daemon 0 0 0 - /root/.gvfs/dev/sdb 4291545600 11 4291545589 1% /opt
