使用虛擬機時發現磁盤空間不夠了，需要掛載一個磁盤以供繼續使用，但是磁盤不是添加就可以使用的，還需要進行掛載。
一、添加磁盤
添加加新硬盤重啟服務器
添加完之后就可以重啟機器了，如果你機器是開啟的，進入系統并不能看見你剛添加的那塊磁盤，只有等系統重啟，重新加載之后才會顯示安裝的那塊磁盤
二、進入系統
使用root用戶進入系統
三、 查看硬盤信息
[root@localhost ~]# fdisk -l //磁盤命令
Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000c4cb5
Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 2611 20458496 8e Linux LVM
Disk /dev/sdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xd0f5c869
Device Boot Start End Blocks Id System
/dev/sdb1 1 2610 20964793+ 83 Linux
Disk /dev/sdc: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
可以看到這臺機器加載了三個磁盤sda、sdb、sdc
其中sda是初始磁盤，sdb已經初始化且經過使用，sdc是剛剛加載的，未格式化的新磁盤
四、創建新硬盤分區
[root@localhost ~]# fdisk /dev/sdc #進入磁盤
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x45a3cadb.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): m
Command action
a toggle a bootable flag #設定可啟動標記
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition #刪除一個分區
l list known partition types #各分區類型所對應的ID
m print this menu #菜單
n add a new partition #添加一個分區
o create a new empty DOS partition table
p print the partition table #顯示該磁盤下的當前分區信息
q quit without saving changes #不保存退出
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 #保存退出
x extra functionality (experts only)
知道命令之后就可以進行分區了
Command (m for help): p //打印分區信息,可以看到當前并沒有分區
Disk /dev/sdc: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x45a3cadb
Device Boot Start End Blocks Id System
Command (m for help): n //創建一個新的分區
Command action
e extended//輸入e為創建擴展分區
p primary partition (1-4) //輸入p為創建邏輯分區
p
Partition number (1-4): 1//劃分邏輯分區
First cylinder (1-2610, default 1): //我這里直接回車,是不想把該磁盤分成多個分區,把整個磁盤作為1個分區
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-2610, default 2610):
Using default value 2610
Command (m for help): p //再次查看可以看到該磁盤已經有1個分區了
Disk /dev/sdc: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x45a3cadb
Device Boot Start End Blocks Id System
/dev/sdc1 1 2610 20964793+ 83 Linux
Command (m for help): w //保存分區
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
再次使用”fdisk -l”命令查看磁盤信息
Disk /dev/sdc: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x406a4c58
Device Boot Start End Blocks Id System
/dev/sdc1 1 2610 20964793+ 83 Linux
第三塊磁盤/dev/sdc已經分區好了
五、格式化分區
[root@localhost ~]# mkfs.ext3 /dev/sdc1
//將/dev/sdc1格式化為ext3類型,好像大部分的磁盤都是格式化為ext3類型,具體為什么沒有深入研究,暫時不清楚,想了解的朋友可以自己查一下
[root@localhost ~]# mkfs.ext3 /dev/sdc1
mke2fs 1.41.12 (17-May-2010)
文件系統標簽=
操作系統:Linux
塊大小=4096 (log=2)
分塊大小=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
1310720 inodes, 5241198 blocks
262059 blocks (5.00%) reserved for the super user
第一個數據塊=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
正在寫入inode表: 完成
Creating journal (32768 blocks): 完成
Writing superblocks and filesystem accounting information: 完成
This filesystem will be automatically checked every 31 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
格式化完畢，此時就可以使用“mount”命令掛載分區了，然后使用這個磁盤空間了
六、掛載分區以及開機自動掛載
[root@localhost ~]# df -h //此時只有sda1和sdb1兩個磁盤掛載
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root 18G 15G 1.5G 92% /
tmpfs 932M 76K 932M 1% /dev/shm
/dev/sda1 485M 40M 421M 9% /boot
/dev/sdb1 20G 1.2G 18G 7% /disk/diskone
/dev/sr0 4.2G 4.2G 0 100% /media/CentOS_6.5_Final
[root@localhost /]# cd /disk/
[root@localhost disk]# ll
總用量 4
drwxr-xr-x. 4 root root 4096 7月 28 17:04 diskone
[root@localhost disk]# cd diskone/
[root@localhost diskone]# ll
總用量 20
drwx------. 2 root root 16384 7月 28 16:12 lost+found
drwxr-xr-x. 2 root root 4096 7月 28 17:09 software
[root@localhost diskone]# cd ../
[root@localhost disk]# mkdir disktwo //創建被掛載的路徑
[root@localhost disk]# ll
總用量 8
drwxr-xr-x. 4 root root 4096 7月 28 17:04 diskone
drwxr-xr-x. 2 root root 4096 8月 1 16:48 disktwo
[root@localhost disk]# mount /dev/sdc1 /disk/disktwo/ //進行掛載
[root@localhost disk]# df -h //再次查看,發現sdc1已經掛載在/disk/disktwo路徑下
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root 18G 15G 1.5G 92% /
tmpfs 932M 76K 932M 1% /dev/shm
/dev/sda1 485M 40M 421M 9% /boot
/dev/sdb1 20G 1.2G 18G 7% /disk/diskone
/dev/sr0 4.2G 4.2G 0 100% /media/CentOS_6.5_Final
/dev/sdc1 20G 173M 19G 1% /disk/disktwo
磁盤已經掛載上了
下面設置開機自動掛載
編輯/etc/fstab文件，再最后面添加
/dev/sdc1(磁盤分區) /disk/disktwo（掛載目錄） ext3（文件格式）defaults 0 0
vim /etc/fstab
/dev/sdc1(磁盤分區) /disk/disktwo（掛載目錄） ext3（文件格式）defaults 0 0
之后重啟就OK啦！！！
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持腳本之家。
