试图挂载磁盘(硬件raid)但失败了.

#mount -t ext4 /dev/sda /data

mount: wrong fs type, bad option, bad superblock on /dev/sda,

missing codepage or helper program, or other error

In some cases useful info is found in syslog - try

dmesg | tail or so

#dmesg | tail -1

EXT4-fs (sda): VFS: Can't find ext4 filesystem

我究竟做错了什么？

我看到许多有类似问题的海报都要求发布fstab的内容,所以这里是：

#cat /etc/fstab

#

# /etc/fstab

# Created by anaconda on Wed Aug 6 11:29:15 2014

#

# 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=276c97cc-9c5f-496f-a56f-ac3a45c58a26 / ext4 defaults,usrquota,grpquota 1 1

UUID=3978f122-03d4-48db-adeb-6fc8a2c624c4 /boot ext2 defaults 1 2

UUID=1251c6d8-c417-48df-9cf4-2f56e3a823a6 /tmp ext4 defaults 1 2

UUID=95fd67df-7172-4ac9-9264-0b50819a203a 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

CentOs 6

更新：

# cat /proc/partitions

major minor #blocks name

8 32 244198584 sdc

8 33 102400 sdc1

8 34 4194304 sdc2

8 35 2097152 sdc3

8 36 1 sdc4

8 37 237802496 sdc5

8 48 244198584 sdd

8 49 102400 sdd1

8 50 4194304 sdd2

8 51 2097152 sdd3

8 52 1 sdd4

8 53 237802496 sdd5

8 0 21484255232 sda

8 16 21484255232 sdb

9 1 4192192 md1

9 3 237671232 md3

9 2 2096064 md2

9 0 102336 md0

#fdisk -l | grep sda

Disk /dev/sda: 21999.9 GB, 21999877357568 bytes