centOS 添加硬盘并挂载

    [root@localhost ~]$ cd /
    [root@localhost /]$ fdisk -l

    Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes


    Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk label type: dos
    Disk identifier: 0x0009f44d

       Device Boot      Start         End      Blocks   Id  System
    /dev/sda1   *        2048     2099199     1048576   83  Linux
    /dev/sda2         2099200    41943039    19921920   8e  Linux LVM

    Disk /dev/mapper/centos-root: 18.2 GB, 18249416704 bytes, 35643392 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes


    Disk /dev/mapper/centos-swap: 2147 MB, 2147483648 bytes, 4194304 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes

    [root@localhost /]$ fdisk /dev/sda2
    Welcome to fdisk (util-linux 2.23.2).

    Changes will remain in memory only, until you decide to write them.
    Be careful before using the write command.

    Device does not contain a recognized partition table
    Building a new DOS disklabel with disk identifier 0x05bddb76.

    Command (m for help): n
    Partition type:
       p   primary (0 primary, 0 extended, 4 free)
       e   extended
    Select (default p): p
    Partition number (1-4, default 1):
    First sector (2048-39843839, default 2048):
    Using default value 2048
    Last sector, +sectors or +size{K,M,G} (2048-39843839, default 39843839):
    Using default value 39843839
    Partition 1 of type Linux and of size 19 GiB is set

    Command (m for help): p

    Disk /dev/sda2: 20.4 GB, 20400046080 bytes, 39843840 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk label type: dos
    Disk identifier: 0x05bddb76

         Device Boot      Start         End      Blocks   Id  System
    /dev/sda2p1            2048    39843839    19920896   83  Linux

    Command (m for help): w
    The partition table has been altered!

    Calling ioctl() to re-read partition table.

    WARNING: Re-reading the partition table failed with error 22: Invalid argument.
    The kernel still uses the old table. The new table will be used at
    the next reboot or after you run partprobe(8) or kpartx(8)
    Syncing disks.
    [root@localhost /]$ fdisk -l

    Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes


    Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk label type: dos
    Disk identifier: 0x0009f44d

       Device Boot      Start         End      Blocks   Id  System
    /dev/sda1   *        2048     2099199     1048576   83  Linux
    /dev/sda2         2099200    41943039    19921920   8e  Linux LVM

    Disk /dev/mapper/centos-root: 18.2 GB, 18249416704 bytes, 35643392 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes


    Disk /dev/mapper/centos-swap: 2147 MB, 2147483648 bytes, 4194304 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes

    [root@localhost /]$  mkfs.ext3 /dev/sdb
    mke2fs 1.42.9 (28-Dec-2013)
    /dev/sdb is entire device, not just one partition!
    Proceed anyway? (y,n) y
    Filesystem label=
    OS type: Linux
    Block size=4096 (log=2)
    Fragment size=4096 (log=2)
    Stride=0 blocks, Stripe width=0 blocks
    1310720 inodes, 5242880 blocks
    262144 blocks (5.00%) reserved for the super user
    First data block=0
    Maximum filesystem blocks=4294967296
    160 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,
        4096000

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

    [root@localhost /]$ mkdir glusterFS
    [root@localhost /]$ mount /dev/sdb /glusterFS
    [root@localhost /]$ df /glusterFS -kh
    Filesystem      Size  Used Avail Use% Mounted on
    /dev/sdb         20G   45M   19G   1% /glusterFS
    [root@localhost /]$ df -sh
    df: invalid option -- 's'
    Try 'df --help' for more information.
    [root@localhost /]$ df -h
    Filesystem               Size  Used Avail Use% Mounted on
    /dev/mapper/centos-root   17G  1.1G   16G   7% /
    devtmpfs                 901M     0  901M   0% /dev
    tmpfs                    912M     0  912M   0% /dev/shm
    tmpfs                    912M  8.6M  904M   1% /run
    tmpfs                    912M     0  912M   0% /sys/fs/cgroup
    /dev/sda1               1014M  143M  872M  15% /boot
    tmpfs                    183M     0  183M   0% /run/user/0
    /dev/sdb                  20G   45M   19G   1% /glusterFS
    [root@localhost /]$

    [root@cgsl ]# Command (m for help): n

    [root@cgsl ]# Select (default p): p

    [root@cgsl ]# Partition number (1-4, default 1): 1