VPS挂载未使用硬盘教程方法把未被使用的硬盘并入。
命令检查当前硬盘使用情况
运行命令
fdisk -l结果如下：
Disk /dev/sdb: 26.8 GB, 26843545600 bytes（未被使用的空间）
255 heads, 63 sectors/track, 3263 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
Disk /dev/sda: 10.7 GB, 10737418240 bytes（已经是被使用的空间）
255 heads, 63 sectors/track, 1305 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: 0x000229dd
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 1306 9972736 8e Linux LVM
Disk /dev/mapper/vg_cloud-lv_root: 9135 MB, 9135194112 bytes
255 heads, 63 sectors/track, 1110 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
Disk /dev/mapper/vg_cloud-lv_swap: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 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查看已经使用情况
df -hal
[root@cloud /]# df -hal
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_cloud-lv_root
8.3G 2.2G 5.7G 28% /
proc 0 0 0 - /proc
sysfs 0 0 0 - /sys
devpts 0 0 0 - /dev/pts
tmpfs 495M 0 495M 0% /dev/shm
/dev/sda1 477M 28M 424M 7% /boot
none 0 0 0 - /proc/sys/fs/binfmt_misc增加分区
查找我们要的硬盘信息 接下来就是进行分区并挂着
fdisk /dev/sdb通过上述的命令进行新增加分区，然后看下图或者按照下面的命令进行操作（//为解释）
- n //新建分区
- p //主分区
- 4 //第4个分区，根据实际分区数，如已有2个分区，然后我们这里就输入3
- 回车 //回车默认
- 回车 //默认
- t //指定分区格式
- 8e //分区格式为LVM
- w //保存
- reboot //重启VPS
以下是操作记录
[root@cloud /]# fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x5a6379c9.
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): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-3263, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-3263, default 3263):
Using default value 3263
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.重启之后，我们检查看看硬盘分区情况
[root@cloud ~]# fdisk -l
Disk /dev/sdb: 26.8 GB, 26843545600 bytes
255 heads, 63 sectors/track, 3263 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: 0x5a6379c9
（刚才操作的）
Device Boot Start End Blocks Id System
/dev/sdb1 1 3263 26210016 8e Linux LVM
Disk /dev/sda: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 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: 0x000229dd
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 1306 9972736 8e Linux LVM
Disk /dev/mapper/vg_cloud-lv_root: 9135 MB, 9135194112 bytes
255 heads, 63 sectors/track, 1110 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
Disk /dev/mapper/vg_cloud-lv_swap: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 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格式化 自动挂载
[root@cloud ~]# mkfs.ext3 /dev/sdb1 （格式化）
mke2fs 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
1638400 inodes, 6552504 blocks
327625 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
200 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
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 25 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
[root@cloud ~]# mount /dev/sdb1 /data （手动挂载）
[root@cloud ~]# df -hal （查看使用情况）
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_cloud-lv_root
8.3G 2.2G 5.7G 28% /
proc 0 0 0 - /proc
sysfs 0 0 0 - /sys
devpts 0 0 0 - /dev/pts
tmpfs 495M 0 495M 0% /dev/shm
/dev/sda1 477M 28M 424M 7% /boot
none 0 0 0 - /proc/sys/fs/binfmt_misc
/dev/sdb1 25G 173M 24G 1% /data （手动挂载）
[root@cloud ~]# umount /dev/sdb1 (卸载)
[root@cloud ~]# vim /etc/fstab
在文件后面添加
/dev/sdb1 /data ext3 defaults 1 2
[root@cloud ~]# mount -a （读取fstab自动挂载哈哈）
[root@cloud ~]# df -hal
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_cloud-lv_root
8.3G 2.2G 5.7G 28% /
proc 0 0 0 - /proc
sysfs 0 0 0 - /sys
devpts 0 0 0 - /dev/pts
tmpfs 495M 0 495M 0% /dev/shm
/dev/sda1 477M 28M 424M 7% /boot
none 0 0 0 - /proc/sys/fs/binfmt_misc
/dev/sdb1 25G 173M 24G 1% /data（我又出来了）
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