主题 新增硬盘扩容Linux下的分区大小
关键词 Linux分区 调整大小
操作环境 VMWare7.0+RHEL5
问题分析 在目录大小不足的情况下在线对其进行扩容
一、首先是在关机的环境下点击虚拟机的属性，对其添加一块硬盘
二、查看硬盘状态
[root@localhost~]# fdisk -l
Disk /dev/sda:21.4 GB, 21474836480 bytes
255 heads, 63sectors/track, 2610 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 2610 20860402+ 8e Linux LVM
Disk /dev/sdb:21.4 GB, 21474836480 bytes
255 heads, 63sectors/track, 2610 cylinders
Units =cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/sdbdoesn't contain a valid partition table//显示找到一个盘sdb，但是没有有效的分区表
三、查看新盘的信息
[root@localhost~]# df /dev/sdb
Filesystem 1K-blocks Used Available Use% Mounted on
- 257604 100 257504 1% /dev
四、对新盘进行分区
[root@localhost~]# fdisk /dev/sdb
Device containsneither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a newDOS disklabel. Changes will remain in memory only,
until youdecide to write them. After that, of course, the previous
content won'tbe recoverable.
The number ofcylinders for this disk is set to 2610.
There isnothing wrong with that, but this is larger than 1024,
and could incertain setups cause problems with:
1) softwarethat runs at boot time (e.g., old versions of LILO)
2) booting andpartitioning 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 forhelp): n//创建一个新的逻辑磁盘
Command action
e extended//扩展分区
p primary partition (1-4)
p//主分区
Partitionnumber (1-4): 1//相当于盘符
First cylinder(1-2610, default 1): 1//第一柱头
Last cylinderor +size or +sizeM or +sizeK (1-2610, default 2610): 2610//最后的柱头
Command (m forhelp): t//选择分区类型
Selectedpartition 1
Hex code (typeL to list codes): 83//83是Linux类型,，具体类型可以在l下面看到
Command (m forhelp): w//写入分区表
The partitiontable has been altered!
Calling ioctl()to re-read partition table.
Syncing disks.
//下面是格式化分区为ext3格式
[root@localhost~]# mkfs.ext3 /dev/sdb1
mke2fs 1.39(29-May-2006)
Filesystemlabel=
OS type: Linux
Block size=4096(log=2)
Fragmentsize=4096 (log=2)
2621440 inodes,5241198 blocks
262059 blocks(5.00%) reserved for the super user
First datablock=0
Maximumfilesystem blocks=0
160 blockgroups
32768 blocksper group, 32768 fragments per group
16384 inodesper group
Superblockbackups stored on blocks:
32768, 98304, 163840, 229376, 294912,819200, 884736, 1605632, 2654208,
4096000
Writing inodetables: done
Creatingjournal (32768 blocks): done
Writingsuperblocks and filesystem accounting information: done
This filesystemwill be automatically checked every 37 mounts or
180 days,whichever comes first. Use tune2fs -c or-i to override.
五、查看分区情况
[root@localhost~]# df -l
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
19172036 3898228 14284216 22% /
/dev/sda1 101086 12177 83690 13% /boot
tmpfs 257604 0 257604 0% /dev/shm
六、查看卷组信息
[root@localhost~]# vgdisplay
/dev/hdc: open failed: No medium found
--- 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 19.88 GB
PE Size 32.00 MB
Total PE 636
Alloc PE / Size 636 / 19.88 GB
Free PE / Size 0 / 0
VG UUID 7jEsDl-z6et-uIFB-D4NY-9OIM-UGBK-HZrbrP
七、创建物理卷
[root@localhost ~]# pvcreate /dev/sdb1
Physical volume "/dev/sdb1"successfully created
八、想卷组中添加物理卷
[root@localhost ~]# vgextend /dev/VolGroup00/dev/sdb1
/dev/hdc: open failed: No medium found
Volume group "VolGroup00"successfully extended
九、查看卷组信息
[root@localhost~]# vgdisplay
/dev/hdc: open failed: No medium found
--- Volume group ---
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 2
Act PV 2
VG Size 39.84 GB
PE Size 32.00 MB
Total PE 1275
Alloc PE / Size 636 / 19.88 GB
Free PE / Size 639 / 19.97 GB
VG UUID 7jEsDl-z6et-uIFB-D4NY-9OIM-UGBK-HZrbrP
十、增加卷容量
[root@localhost ~]# lvextend -L +1024M/dev/VolGroup00/LogVol00
/dev/hdc: open failed: No medium found
Extending logical volume LogVol00 to 19.88 GB
Logical volume LogVol00 successfully resized
十一、重建大小
[root@localhost ~]# /sbin/resize2fs/dev/VolGroup00/LogVol00
resize2fs 1.39(29-May-2006)
Filesystem at/dev/VolGroup00/LogVol00 is mounted on /; on-line resizing required
Performing anon-line resize of /dev/VolGroup00/LogVol00 to 5210112 (4k) blocks.
The filesystemon /dev/VolGroup00/LogVol00 is now 5210112 blocks long.
十二、查看效果
[root@localhost~]# df -l
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
20187780 3898352 15247420 21% /
/dev/sda1 101086 12177 83690 13% /boot
tmpfs 257604 0 257604 0% /dev/shm