#取消挂载
[root@localhost /]# umount /opt
umount: /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 -f
umount2: 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 4294967295
mke2fs 1.43.3 (04-Sep-)
/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
#
# 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 1
UUID=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 0
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
/dev/sdb /opt ext4 defaults 1 2
[root@localhost /]# mount /dev/sdb /opt/disk
[root@localhost /]# df -h
Filesystem 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 -ia
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/mapper/VolGroup-lv_root 3276800 115048 3161752 4% /
proc 0 0 0 - /proc
sysfs 0 0 0 - /sys
devpts 0 0 0 - /dev/pts
tmpfs 12376269 6 12376263 1% /dev/shm
/dev/sda1 128016 39 127977 1% /boot
/dev/mapper/VolGroup-lv_home 14680064 40378 14639686 1% /home
none 0 0 0 - /proc/sys/fs/binfmt_misc
gvfs-fuse-daemon 0 0 0 - /root/.gvfs
/dev/sdb 4291545600 11 4291545589 1% /opt
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