一、检测硬盘能否被识别

# fdisk -l
Disk /dev/sda: 36.7 GB, 36703934464 bytes
255 heads, 63 sectors/track, 4462 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
  Device Boot      Start        End      Blocks  Id  System
/dev/sda1  *          1        261    2096451  83  Linux
/dev/sda2            262        783    4192965  83  Linux
/dev/sda3            784        1305    4192965  83  Linux
/dev/sda4            1306        4462    25358602+  5  Extended
/dev/sda5            1306        1827    4192933+  83  Linux
/dev/sda6            1828        2088    2096451  82  Linux swap
/dev/sda7            2089        4462    19069123+  83  Linux
Disk /dev/sdb: 36.7 GB, 36748945408 bytes
255 heads, 63 sectors/track, 4467 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
  Device Boot      Start        End      Blocks  Id  System
/dev/sdb1  *          1        509    4088511  83  Linux
/dev/sdb2            510        2430    15430432+  83  Linux
/dev/sdb3            2431        2557    1020127+  82  Linux swap
/dev/sdb4            2558        4467    15342075    f  W95 Ext'd (LBA)
/dev/sdb5            2558        2811    2040223+  83  Linux
/dev/sdb6            2812        3830    8185086  83  Linux
/dev/sdb7            3831        4467    5116671  83  Linux
/dev/sdb 说明已经识别出第二块硬盘 

二、挂载硬盘

1、在本地硬盘中临时创建一个目录

#mkdir /opt/data/tmp1

2、挂载第二块硬盘中的一个分区/dev/sdb1到tmp1

#mount /dev/sdb1  /opt/data/tmp1

3、查看是否被挂载

# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1            2.0G  141M  1.8G  8% /
none                1014M    0 1014M  0% /dev/shm
/dev/sda2            4.0G  1.8G  2.0G  47% /opt
/dev/sda7              18G  168M  17G  1% /opt/data
/dev/sda5            4.0G  1.4G  2.4G  37% /usr
/dev/sda3            4.0G  2.1G  1.8G  55% /var
/dev/sdb1            3.9G  1.4G  2.3G  38% /opt/tmp/tmp1

三、卸载硬盘

#umount /dev/sdb1