[原創] 在Linux下給主機新增新的硬碟空間

1.劃分新的分割槽.(以/dev/sdb硬碟為例)

[root@dbatest1 ~]# fdisk /dev/sdb

The number of cylinders for this disk is set to 4427.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
   (e.g., DOS FDISK, OS/2 FDISK)

Command (m for help): m
Command action
   a   toggle a bootable flag
   b   edit bsd disklabel
   c   toggle the dos compatibility flag
   d   delete a partition
   l   list known partition types
   m   print this menu
   n   add a new partition
   o   create a new empty DOS partition table
   p   print the partition table
   q   quit without saving changes
   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
   x   extra functionality (experts only)

Command (m for help): d   ---刪除原有分割槽
Partition number (1-4): 1

Command (m for help): d
Selected partition 2

Command (m for help): d   ---確認已刪除了原有分割槽
No partition is defined yet!

Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 4  ---將整個硬碟劃分成一個分割槽

First cylinder (1-4427, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-4427, default 4427):
Using default value 4427

Command (m for help): w   ---儲存資訊
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

2.檢視已劃分好的分割槽

[root@dbatest1 ~]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                     136805368   3153192 126590672   3% /
/dev/sda1               101086     10906     84961  12% /boot
tmpfs                  1037772         0   1037772   0% /dev/shm

[root@dbatest1 ~]# fdisk -l

Disk /dev/sda: 146.8 GB, 146815733760 bytes
255 heads, 63 sectors/track, 17849 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       17849   143267670   8e  Linux LVM

Disk /dev/sdb: 146.8 GB, 146815733760 bytes
255 heads, 63 sectors/track, 17849 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb4               1       17849   143372061   83  Linux

Disk /dev/sdc: 36.4 GB, 36420075008 bytes
255 heads, 63 sectors/track, 4427 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc4               1        4427    35559846   83  Linux
[root@dbatest1 ~]#
[root@dbatest1 ~]#

3.將新的分割槽加上LVM管理

1).建立PV
[root@dbatest1 ~]# pvcreate /dev/sdb4
  Physical volume "/dev/sdb4" successfully created
 
2).建立VG
[root@dbatest1 ~]# vgcreate vgdata01 /dev/sdb4
  Volume group "vgdata01" successfully created

3).建立LV
[root@dbatest1 ~]# lvcreate -L 140000M -n lvdata01 vgdata01
  Logical volume "lvdata01" created
 
4).建立ext3檔案系統
[root@dbatest1 ~]# mkfs.ext3 /dev/vgdata01/lvdata01
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
17924096 inodes, 35840000 blocks
1792000 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=0
1094 block groups
32768 blocks per group, 32768 fragments per group
16384 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000, 7962624, 11239424, 20480000, 23887872

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.

5).建立mount目錄

[root@dbatest1 /]# mkdir data01

6).掛接LV到mountpoint

[root@dbatest1 /]# mount /dev/vgdata01/lvdata01 /data01

4.確認已完成.

[root@dbatest1 /]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                     136805368   3153212 126590652   3% /
/dev/sda1               101086     10906     84961  12% /boot
tmpfs                  1037772         0   1037772   0% /dev/shm
/dev/mapper/vgdata01-lvdata01
                     141110136    192132 133750004   1% /data01

 

來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/7364032/viewspace-422877/，如需轉載，請註明出處，否則將追究法律責任。