装上CentOS5.5系统后，准备对剩下空间的进行分区，做iscsi共享，使用fdisk -l命令发现，显示的是4块完整的盘！

[root@file2 ~]# fdisk -l

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1       31871   256003776   83  Linux
/dev/sda2           31872       32075     1638630   82  Linux swap / Solaris
/dev/sda3           32076      243201  1695869595   83  Linux

Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *           1       31871   256003776   83  Linux
/dev/sdb2           31872       32075     1638630   82  Linux swap / Solaris
/dev/sdb3           32076      243201  1695869595   83  Linux

Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdc doesn’t contain a valid partition table

Disk /dev/sdd: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdd doesn’t contain a valid partition table

使用df -h查看显示如下：

[root@file2 ~]# df -h
文件系统              容量  已用 可用 已用% 挂载点
/dev/mapper/isw_ihhcieff_file2p1
237G  3.3G  222G   2% /
tmpfs                 1.9G     0  1.9G   0% /dev/shm

这个/dev/mapper应该就是raid10的整个分区？记得装系统分区时，磁盘显示是这个/dev/mapper/isw_ihhcieff_file2。那么拿这个开刀：

[root@file2 ~]# fdisk /dev/mapper/isw_ihhcieff_file2

The number of cylinders for this disk is set to 243201.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)

Command (m for help):

真的进去，还可以分区！如果么有错的话，那么raid的分区应该就类似这个的吧？