使用环境使用的是CentOS5.8 内核是 2.6.18-238.19.1.el5
其实CentOS 5.8 里面是有 ext4 模块的，只是没加载，所以我们先把模块加入系统
# cd
/lib/modules/2.6.18-238.19.1.el5/kernel/fs/ext4
//ext4模块就在此目录下
# [root@linux ext4]# ls
ext4.ko
找到模块后使用modprobe 命令添加
# modprobe ext4
//注意：这里只能写模块名，不能写成 ext4.ko
# lsmod |grep ext4 //添加完后使用lsmod 查看
ext4
285409 0
jbd2
47744 1 ext4
crc16
1027 1 ext4
[root@linux ext4]# yum install
e4fsprogs //最后使用yum
安装一下 e4fsprogs
[root@linux ext4]# mkfs.ext4
/dev/sdc //最后创建一个分区来使用ext4
创建文件系统
mke4fs 1.41.12 (17-May-2010)
/dev/sdi is entire device, not just one partition!
Proceed anyway? (y,n) y
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
61014016 inodes, 244056064 blocks
12202803 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
7448 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200,
884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872,
71663616, 78675968,
102400000, 214990848
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 31 mounts or
180 days, whichever comes first. Use tune4fs -c or -i to
override.
[root@linux ext4]#mount
/dev/sdc /hadoop1
