如何给linux添加一块硬盘

                                                               如何给linux添加一块硬盘

overview：

添加一块15G的硬盘

  170  fdisk -l          列出所有硬盘

  171  sudo pvcreate /dev/sdb      ----------sdb为新添加的物理盘，准备供lvm使用

  172  sudo vgcreate 12c /dev/sdb    -------------------创建名为12c的卷组

  174  sudo lvcreate -l 100%FREE -n 12clv 12c   ----------------------------创建名为12lv的逻辑卷

  
  175  sudo mkfs -t ext4 /dev/12c/12clv     --------------------------创建文件系统

  176  sudo mkdir /12c      ----------------------------创建挂载点

  177  sudo vi /etc/fstab   -------------------------设置挂载的选项，挂载点

                              
  178  sudo mount /12c    -------------------------- 挂载这个文件系统
 

eg：

[root@localhost ~]# fdisk -l

Disk /dev/sda: 14.3 GB, 14343061504 bytes
255 heads, 63 sectors/track, 1743 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          13      104391   83  Linux
/dev/sda2              14        1743    13896225   8e  Linux LVM

Disk /dev/sdb: 16.1 GB, 16106127360 bytes
255 heads, 63 sectors/track, 1958 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdb doesn't contain a valid partition table

Disk /dev/dm-0: 13.1 GB, 13153337344 bytes
255 heads, 63 sectors/track, 1599 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/dm-0 doesn't contain a valid partition table

Disk /dev/dm-1: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/dm-1 doesn't contain a valid partition table

[root@localhost ~]# sudo pvcreate /dev/sdb
  Writing physical volume data to disk "/dev/sdb"
  Physical volume "/dev/sdb" successfully created

[root@localhost ~]# sudo vgcreate 12c /dev/sdb
  Volume group "12c" successfully created

[root@localhost ~]# sudo lvcreate -l 100%FREE -n 12clv
  Path required for Logical Volume "12clv"
  Please provide a volume group name
  Run `lvcreate --help' for more information.

[root@localhost ~]# sudo lvcreate -l 100%FREE -n 12clv 12c
  Logical volume "12clv" created

[root@localhost ~]# sudo mkfs -t ext4 /dev/12c/12clv
mke4fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
983040 inodes, 3931136 blocks
196556 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4026531840
120 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208

Writing inode tables: done                           
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 22 mounts or
180 days, whichever comes first.  Use tune4fs -c or -i to override.

[root@localhost ~]# sudo mkdir /12c

[root@localhost ~]# sudo vi /etc/fstab
/dev/VolGroup00/LogVol00 /                       ext3    defaults        1 1
LABEL=/boot             /boot                   ext3    defaults        1 2
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
/dev/VolGroup00/LogVol01 swap                    swap    defaults        0 0
/dev/12c/12clv          /12c                     ext4    defaults       0 0
~
~

"/etc/fstab" 8L, 610C written

[root@localhost ~]# sudo mount /12c

[root@localhost ~]# cd /
[root@localhost /]# ll
total 166
drwxr-xr-x   3 root root  4096 Jun 26 07:26 12c
drwxr-xr-x   3 root root  4096 Jun 20 00:04 bin
drwxr-xr-x   4 root root  1024 Jun 19 10:34 boot
drwxr-xr-x  13 root root  3900 Jun 26 07:25 dev
drwxr-xr-x  98 root root 12288 Jun 26 07:30 etc
drwxr-xr-x   4 root root  4096 Jun 26 06:29 home
drwxr-xr-x  11 root root  4096 Jun 20 00:04 lib
drwxr-xr-x   9 root root  4096 Jun 20 00:04 lib64
drwx------   2 root root 16384 Jun 19 10:23 lost+found
drwxr-xr-x   3 root root  4096 Jun 26 07:18 media
drwxr-xr-x   2 root root     0 Jun 26 07:18 misc
drwxr-xr-x   2 root root  4096 Feb 16  2010 mnt
drwxr-xr-x   2 root root     0 Jun 26 07:18 net
drwxr-xr-x   2 root root  4096 Feb 16  2010 opt
dr-xr-xr-x 123 root root     0 Jun 26 07:17 proc
drwxr-x---  15 root root  4096 Jun 26 06:46 root
drwxr-xr-x   2 root root 12288 Jun 20 00:04 sbin
drwxr-xr-x   2 root root  4096 Jun 19 10:23 selinux
drwxr-xr-x   2 root root  4096 Feb 16  2010 srv
drwxr-xr-x  13 root root     0 Jun 26 07:17 sys
drwxr-xr-x   3 root root  4096 Jun 19 10:31 tftpboot
drwxrwxrwt   8 root root  4096 Jun 26 07:19 tmp
drwxr-xr-x  15 root root  4096 Jun 19 10:26 usr
drwxr-xr-x  21 root root  4096 Jun 19 10:37 var

[root@localhost /]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                       12G  8.7G  2.6G  78% /
/dev/sda1              99M   24M   71M  25% /boot
tmpfs                 244M     0  244M   0% /dev/shm
/dev/mapper/12c-12clv
                       15G  166M   14G   2% /12c

[root@localhost /]# cd /12c

[root@localhost 12c]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                       12G  8.7G  2.6G  78% /
/dev/sda1              99M   24M   71M  25% /boot
tmpfs                 244M     0  244M   0% /dev/shm
/dev/mapper/12c-12clv
                       15G  166M   14G   2% /12c
[root@localhost 12c]#

到此成功添加一块硬盘，并建立文件系统