我的没有这个问题啊。你什么操作系统啊？

[@zw_77_108 ~]# cat /etc/issue

Red Hat Enterprise Linux Server release 6.1 (Santiago)

[@zw_77_108 ~]# df -T

文件系统 类型 1K-块 已用 可用 已用% 挂载点

/dev/sda1 ext4 4128448 406500 3512236 11% /

/dev/sda6 ext4 122948636 68393488 48309724 59% /opt

/dev/sda5 ext4 5160576 1623264 3275168 34% /usr

/dev/sda2 ext4 4128448 2045696 1873040 53% /var

tmpfs tmpfs 12296236 0 12296236 0% /dev/shm

/dev/sdb1 xfs 10736379868 7405334636 3331045232 69% /data

[@zw_77_108 ~]# df -h

文件系统 容量 已用 可用 已用%% 挂载点

/dev/sda1 4.0G 397M 3.4G 11% /

/dev/sda6 118G 66G 47G 59% /opt

/dev/sda5 5.0G 1.6G 3.2G 34% /usr

/dev/sda2 4.0G 2.0G 1.8G 53% /var

tmpfs 12G 0 12G 0% /dev/shm

/dev/sdb1 10T 6.9T 3.2T 69% /data

[@zw_77_108 ~]# cat /etc/fstab

#

# /etc/fstab

# Created by anaconda on Thu Mar 29 15:26:08 2012

#

# 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

#

UUID=c3107c81-154b-48e7-ae41-fba28d314747 / ext4 defaults 1 1

UUID=dea675e6-301c-4e49-ad4a-aee413e1578b /opt ext4 defaults,noatime,nodiratime 0 0

UUID=55b2cafe-480b-43e9-827f-7b97946a6aff /usr ext4 defaults 1 2

UUID=5dd32206-8a35-44f8-a18a-d106d53ce46e /var ext4 defaults 1 2

UUID=0bebe7cf-09f6-4e33-ab5c-c3bc7952d829 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/shm /tmp none rw,bind 0 0

/dev/sdb1 /data xfs defaults,noatime,nodiratime 0 0

[@zw_77_108 ~]#