pw镜像无法连接FTP什么情况啊

已经连上了，但是挂载数据盘时候输入fdisk -1出现以下
[root@iZ23mjipz8rZ ~]# fdisk -1
fdisk: invalid option -- '1'


Usage:
fdisk [options] <disk>    change partition table
fdisk [options] -l <disk> list partition table(s)
fdisk -s <partition>      give partition size(s) in blocks


Options:
-b <size>                 sector size (512, 1024, 2048 or 4096)
-c                        switch off DOS-compatible mode
-h                        print help
-u <size>                 give sizes in sectors instead of cylinders
-v                        print version
-C <number>               specify the number of cylinders
-H <number>               specify the number of heads
-S <number>               specify the number of sectors per track

要说下具体现象，具体错误，这样没人能帮忙。