linux新增磁盘分区时出现问题-150

linux(centos 5.5) 系统磁盘不够用，新增一块硬盘sdb 在分区中出现了问题
# fdisk -l
# fdisk /dev/sdb

Command (m for help): n
Command action
e extended
p primary partition (1-4)
//创建新的扩展分区
e
Partition number (1-4): 1
First cylinder (1-13054, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-13054, default 13054):
Using default value 13054

Command (m for help): w
//格式化出现问题：
# mkfs.ext3 /dev/sdb1
mke2fs 1.41.12 (17-May-2010)
mkfs.ext3: inode_size (128) * inodes_count (0) too big for a
filesystem with 0 blocks, specify higher inode_ratio (-i)
or lower inode count (-N).
//格式化扩展分区报错，扩展分区不能格式化，要扩展分区下的逻辑分区才能格式化。
//新建逻辑分区
#fdisk /dev/sdb
Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
l
First cylinder (1-13054, default 1): 1
Last cylinder, +cylinders or +size{K,M,G} (1-13054, default 13054):
Using default value 13054

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

//格式化ext3系统，挂载可以正常使用了
# mkfs.ext3 /dev/sdb5
mke2fs 1.41.12 (17-May-2010)
.
.
.
Writing inode tables: 680/800