linux挂载新硬盘

fdisk -l 命令看当前磁盘信息
[root@roswell root]# fdisk /dev/sdb
Command (m for help): m  --打印该命令的参数功能列表
Command action
   a   toggle a bootable flag
   b   edit bsd disklabel
   c   toggle the dos compatibility flag
   d   delete a partition
   l   list known partition types
   m   print this menu
   n   add a new partition
   o   create a new empty DOS partition table
   p   print the partition table
   q   quit without saving changes
   s   create a new empty Sun disklabel
   t   change a partition's system id
   u   change display/entry units
   v   verify the partition table
   w   write table to disk and exit
   x   extra functionality (experts only)
Command (m for help):
Command (m for help): p --打印待分区的磁盘信息
Disk /dev/sdb: 50.0 GB, 50019202560 bytes
255 heads, 63 sectors/track, 6081 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
   Device Boot    Start       End    Blocks   Id System
Command (m for help):
Command (m for help): n --进行磁盘分区
Command action
   e   extended
   p   primary partition (1-4)
p  --e：逻辑分区 p：主分区，4个主分区
Partition number (1-4): 1 --划分为第一个主分区
First cylinder (1-6081, default 1): 1 --起始磁盘数，不填默认为1
Last cylinder or +size or +sizeM or +sizeK (1-6081, default 6081): 6081  --定义该分区大小，不填默认为全部可用存储额
Command (m for help): 
Command (m for help): p --打印待分区的磁盘信息
Disk /dev/sdb: 50.0 GB, 50019202560 bytes
255 heads, 63 sectors/trac