RedHat4下装了Oracle，空间不够用了，在网上找了半天终于搞定
第一步：编辑vm的磁盘大小
选择磁盘编辑想改变的大小。
第二步：使用Linux下的fdisk工具进行分区
用root用户登录：
打印当前的磁盘分区表，这时我们可以看到磁盘的总量的确增加到30GB 了，但是分区只有以前的那几个原有的分区[root@localhost ~]# fdisk -l
键入命令： fdisk /dev/sda “sda 就是经过扩容的硬盘，为 SCSI 硬盘， IDE 类型硬盘对应为 hda ，，是对该硬盘进行操作 ”
选择主分区吧，则键入 p
此时， fdisk 会让你选择主分区的编号，如果已经有了主分区 sda1 ， sda2 ，那么编号就选3 ，即要创建的该分区为 sda3.键入： 3
此时， fdisk 又会让你选择该分区的开始值这个就是分区的 Start 值（ start cylinder ）；这里最好直接按回车， 如果您输入了一个非默认的数字，可能会造成空间浪费；
对于分区的 End 值（end cylinder），同样直接按回车。这时候会显示出你新建分区的柱面范围和空间大小。
此时键入： w 表示” 保存所有并退出，分区划分完毕 “
[root@localhost ~]# fdisk /dev/sdaThe number of cylinders for this disk is set to 3916.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): nCommand action e extended p primary partition (1-4)pPartition number (1-4): 3First cylinder (1045-3916, default 1045):Using default value 1045Last cylinder or +size or +sizeM or +sizeK (1045-3916, default 3916):Using default value 3916Command (m for help): wThe partition table has been altered!Calling ioctl() to re-read partition table.WARNING: Re-reading the partition table failed with error 16: 设备或资源忙.The kernel still uses the old table.The new table will be used at the next reboot.Syncing disks.
我们的新建分区/dev/sda3，却不是LVM的。所以，接下来使用fdisk将其改成LVM的。
[root@CNGI-SIP6-BUPT ~]# fdisk /dev/sdaCommand (m for help): mCommand (m for help): t //改变分区系统idPartition number (1-4): 3 //指定分区号Hex code (type L to list codes): 8e //指定要改成的id号，8e代表LVM。Command (m for help): w
[root@localhost ~]# fdisk /dev/sdaThe number of cylinders for this disk is set to 3916.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): mCommand 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): tPartition number (1-4): 3Hex code (type L to list codes): 8eChanged system type of partition 3 to 8e (Linux LVM)Command (m for help): wThe partition table has been altered!Calling ioctl() to re-read partition table.WARNING: Re-reading the partition table failed with error 16: 设备或资源忙.The kernel still uses the old table.The new table will be used at the next reboot.Syncing disks.
重新登录后：[root@localhost ~]# rebootBroadcast message from root (pts/1) (Thu Sep 22 09:54:45 2011):The system is going down for reboot NOW![root@localhost ~]# fdisk -lDisk /dev/sda: 32.2 GB, 32212254720 bytes255 heads, 63 sectors/track, 3916 cylindersUnits = 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/dev/sda3 1045 3916 23069340 8e Linux LVMDisk /dev/sdb: 6442 MB, 6442450944 bytes255 heads, 63 sectors/track, 783 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System/dev/sdb1 1 783 6289416 83 Linux
第三步、格式化该新添加的分区
格式化磁盘[root@localhost ~]# mkfs -t ext3 /dev/sda3mke2fs 1.35 (28-Feb-2004)max_blocks 4294967295, rsv_groups = 0, rsv_gdb = 1024max_blocks 4294967295, rsv_groups = 0, rsv_gdb = 1024warning: 167 blocks unused.Filesystem label=OS type: LinuxBlock size=4096 (log=2)Fragment size=4096 (log=2)2889216 inodes, 5767168 blocks288366 blocks (5.00%) reserved for the super userFirst data block=0Maximum filesystem blocks=8388608176 block groups32768 blocks per group, 32768 fragments per group16416 inodes per groupSuperblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000Writing inode tables: done inode.i_blocks = 90120, i_size = 4243456Creating journal (8192 blocks): doneWriting superblocks and filesystem accounting information: doneThis filesystem will be automatically checked every 24 mounts or180 days, whichever comes first. Use tune2fs -c or -i to override.
第四步、扩充根分区[root@localhost ~]# lvs LV VG Attr LSize Origin Snap% Move Copy% LogVol00 VolGroup00 -wi-ao 5.91G LogVol01 VolGroup00 -wi-ao 1.94G [root@localhost ~]# pvcreate /dev/sdsda sda1 sda2 sda3 sdb sdb1 [root@localhost ~]# pvcreate /dev/sda3 Physical volume “/dev/sda3” successfully created[root@localhost ~]# df -hFilesystem 容量 已用 可用 已用% 挂载点/dev/mapper/VolGroup00-LogVol00 5.9G 5.5G 120M 98% //dev/sda1 99M 9.0M 85M 10% /bootnone 506M 0 506M 0% /dev/shm/dev/sdb1 6.0G 347M 5.3G 7% /disk2[root@localhost ~]# 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 251 / 7.84 GB Free PE / Size 1 / 32.00 MB VG UUID HvKxmm-WazL-TjFN-yXNH-ui8U-pcl9-Pk6psB[root@localhost ~]# vgextend VolGroup00 /dev/sda3 Volume group “VolGroup00” successfully extended[root@localhost ~]# vgdisplay — 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 29.88 GB PE Size 32.00 MB Total PE 956 Alloc PE / Size 251 / 7.84 GB Free PE / Size 705 / 22.03 GB VG UUID HvKxmm-WazL-TjFN-yXNH-ui8U-pcl9-Pk6psB
#不能把 Free PE / Size 705 / 22.03 GB的空间全部加上，应该下雨22.03
[root@localhost ~]# lvextend -L+22.03G /dev/VolGroup00/LogVol00 /dev/sda3 Rounding up size to full physical extent 22.03 GB Extending logical volume LogVol00 to 27.94 GB Insufficient allocatable logical extents (893) for logical volume LogVol00: 894 required
[root@localhost ~]# lvextend -L+21.03G /dev/VolGroup00/LogVol00 /dev/sda3 Rounding up size to full physical extent 21.03 GB Extending logical volume LogVol00 to 26.94 GB Logical volume LogVol00 successfully resized
[root@localhost ~]# cat /etc/fstab# This file is edited by fstab-sync – see ‘man fstab-sync’ for details/dev/VolGroup00/LogVol00 / ext3 defaults 1 1LABEL=/boot /boot ext3 defaults 1 2none /dev/pts devpts gid=5,mode=620 0 0none /dev/shm tmpfs defaults 0 0none /proc proc defaults 0 0none /sys sysfs defaults 0 0/dev/VolGroup00/LogVol01 swap swap defaults 0 0/dev/sdb1 /disk2 ext3 defaults 1 1/dev/hdc /media/cdrom auto pamconsole,exec,noauto,managed 0 0/dev/fd0 /media/floppy auto pamconsole,exec,noauto,managed 0 0[root@localhost ~]# e2fsck -a /dev/VolGroup00/LogVol00/dev/VolGroup00/LogVol00 is mounted. WARNING!!! Running e2fsck on a mounted filesystem may causeSEVERE filesystem damage.Do you really want to continue (y/n)? yes/dev/VolGroup00/LogVol00: recovering journal/dev/VolGroup00/LogVol00: Clearing orphaned inode 596983 (uid=501, gid=501, mode=0100660, size=0)/dev/VolGroup00/LogVol00: clean, 144094/774144 files, 1440278/1548288 blocks
#redhat4 没有resize2fs命令[root@localhost ~]# resize2fs-bash: resize2fs: command not found
#redhat4下用ext2online[root@localhost ~]# ext2online /dev/VolGroup00/LogVol00ext2online v1.1.18 – 2001/03/18 for EXT2FS 0.5b[root@localhost ~]# df -hFilesystem 容量 已用 可用 已用% 挂载点/dev/mapper/VolGroup00-LogVol00 27G 5.5G 20G 22% //dev/sda1 99M 9.0M 85M 10% /bootnone 506M 0 506M 0% /dev/shm/dev/sdb1 6.0G 347M 5.3G 7% /disk2
现在大公告成
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