今日在学习Linux的时候，由于使用的是虚拟机，所以硬盘空间较小，在软件安装是比较麻烦(虽然可以将软件安装在指定的地址，但软件安装时需要将文件解压缩和make时产生大量的临时文件)，所以，继续扩充，由于本人不是虚拟机管理员，又不好意思老是麻烦别人，所以，就自己将另加的一块盘加到主分区中，在网友“小宝”的帮助指导下，成功完成，贴出此文，为帮助有同样需要的朋友，也对小宝表示感谢！其中叙述有不规范和不全之处，请读者自行查阅资料。

 

 

 

这个可以向管理员提出，或自行解决，

 

 

 

[root@centos64 ~]# fdisk /dev/sdb

 

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel

 

Building a new DOS disklabel. Changes will remain in memory only,

 

until you decide to write them. After that, of course, the previous

 

content won't be recoverable.

 

 

 

 

 

The number of cylinders for this disk is set to 1958.

 

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)

 

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

 

 

 

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): n

 

Command action

 

   e   extended

 

   p   primary partition (1-4)

 

p

 

Partition number (1-4): 1

 

First cylinder (1-1958, default 1):

 

Using default value 1

 

Last cylinder or +size or +sizeM or +sizeK (1-1958, default 1958):

 

Using default value 1958

 

 

 

Command (m for help): w

 

The partition table has been altered!

 

 

 

Calling ioctl() to re-read partition table.

 

Syncing disks.

 

 

 

结束后，用df查看

 

[root@centos64 ~]# df

 

Filesystem           1K-blocks      Used Available Use% Mounted on

 

/dev/mapper/VolGroup00-LogVol00

 

                       4031168   3688700    134392  97% /

 

/dev/sda1               101086     12495     83372  14% /boot

 

tmpfs                  1029816         0   1029816   0% /dev/shm

 

 

 

没有发现sdb，不要进行格式化，格式化后分区表又没了，我就上了这个当

 

 

 

用fdisk –l可以看见

 

[root@centos64 ~]# fdisk -l

 

 

 

Disk /dev/sda: 8589 MB, 8589934592 bytes

 

255 heads, 63 sectors/track, 1044 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        1044     8281507+  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

 

 

 

   Device Boot      Start         End      Blocks   Id  System

 

/dev/sdb1               1        1958    15727603+  83  Linux

 

 

 

 

 

 

 

[root@centos64 ~]# pvcreate  --help

 

  pvcreate: Initialize physical volume(s) for use by LVM

 

 

 

pvcreate

 

        [--restorefile file]

 

        [-d|--debug]

 

        [-f[f]|--force [--force]]

 

        [-h|-?|--help]

 

        [--labelsector sector]

 

        [-M|--metadatatype 1|2]

 

        [--metadatacopies #copies]

 

        [--metadatasize MetadataSize[kKmMgGtTpPeE]]

 

        [--setphysicalvolumesize PhysicalVolumeSize[kKmMgGtTpPeE]

 

        [-t|--test]

 

        [-u|--uuid uuid]

 

        [-v|--verbose]

 

        [-y|--yes]

 

        [-Z|--zero {y|n}]

 

        [--version]

 

        PhysicalVolume [PhysicalVolume...]

 

 

 

[root@centos64 ~]# pvcreate  /dev/sdb

 

  Device /dev/sdb not found (or ignored by filtering).

 

[root@centos64 ~]# pvcreate  /dev/sdb1

 

  Physical volume "/dev/sdb1" successfully created

 

 

 

添加分区组

 

[root@centos64 ~]# vgextend --help

 

  vgextend: Add physical volumes to a volume group

 

 

 

vgextend

 

        [-A|--autobackup y|n]

 

        [-d|--debug]

 

        [-h|--help]

 

        [-t|--test]

 

        [-v|--verbose]

 

        [--version]

 

        VolumeGroupName PhysicalDevicePath [PhysicalDevicePath...]

 

这时关键要查到 VolumeGroupName PhysicalDevicePath这两个名称

 

可用vgdisplay查看

 

[root@centos64 ~]# vgdisplay

 

  --- Volume group ---

 

  VG Name               VolGroup00

 

  System ID            

 

  Format                lvm2

 

  Metadata Areas        1

 

  Metadata Sequence No  3

 

  VG Access             read/write

 

  VG Status             resizable

 

  MAX LV                0

 

  Cur LV                2

 

  Open LV               2

 

  Max PV                0

 

  Cur PV                1

 

  Act PV                1

 

  VG Size               7.88 GB

 

  PE Size               32.00 MB

 

  Total PE              252

 

  Alloc PE / Size       252 / 7.88 GB

 

  Free  PE / Size       0 / 0  

 

  VG UUID               PqvyQ3-4JXx-PGCc-9H2q-7BcJ-HW7N-xHZeNP

 

所以，执行如下命令：

 

[root@centos64 ~]# vgextend VolGroup00 /dev/sdb1

 

  Volume group "VolGroup00" successfully extended

 

 

 

 

 

扩展分区组

 

[root@centos64 ~]# lvextend --help

 

  lvextend: Add space to a logical volume

 

 

 

lvextend

 

        [-A|--autobackup y|n]

 

        [--alloc AllocationPolicy]

 

        [-d|--debug]

 

        [-f|--force]

 

        [-h|--help]

 

        [-i|--stripes Stripes [-I|--stripesize StripeSize]]

 

        {-l|--extents [+]LogicalExtentsNumber[%{VG|PVS|FREE}] |

 

         -L|--size [+]LogicalVolumeSize[kKmMgGtTpPeE]}

 

        [-m|--mirrors Mirrors]

 

        [-n|--nofsck]

 

        [-r|--resizefs]

 

        [-t|--test]

 

        [--type VolumeType]

 

        [-v|--verbose]

 

        [--version]

 

        LogicalVolume[Path] [ PhysicalVolumePath... ]

 

后执行

 

[root@centos64 ~]# lvextend -l 1000000 /dev/VolGroup00/LogVol00

 

  Extending logical volume LogVol00 to 30.52 TB

 

  Insufficient free space: 999873 extents needed, but only 479 available

 

这里比较容易出错的是 是logicalVolum的名称容易输成VolGroup00LogVol00，logicalnumber的单位应该是簇，也不要估计，如果你想把整个分区都加上去，数个天文数字吧，系统会告诉你最大数应该是多少

 

 

 

[root@centos64 ~]# resize2fs /dev/VolGroup00/LogVol00

 

resize2fs 1.39 (29-May-2006)

 

Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizing required

 

Performing an on-line resize of /dev/VolGroup00/LogVol00 to 3923968 (4k) blocks.

 

The filesystem on /dev/VolGroup00/LogVol00 is now 3923968 blocks long.

 

最后用df查一下，呵呵，大了吧

 

 

 

[root@centos64 ~]# df

 

Filesystem           1K-blocks      Used Available Use% Mounted on

 

/dev/mapper/VolGroup00-LogVol00

 

                      15207152   3690736  10733404  26% /

 

/dev/sda1               101086     12495     83372  14% /boot

 

tmpfs                  1029816         0   1029816   0% /dev/shm

 

 

 

再次感谢网友小宝的帮助。

 

 

 

【Reference】

 

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许杜村 (2003). Red Hat Linux 9中文版入门与进阶. 北京, 清华大学出版社.