今天下午在linux下删除操作,想安装oracle数据库,整理硬盘的时候用fdisk重新划分分区,我的硬盘分区表是这样的:
QUOTE:# fdisk -l /dev/hda
Disk /dev/hda: 82.3 GB, 82348277760 bytes 255 heads, 63 sectors/track, 10011 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/hda1 * 1 1044 8385898+ 7 HPFS/NTFS C:/dev/hda2 1045 1057 104422+ 83 Linux /boot /dev/hda3 1058 1249 1542240 82 Linux swap /dev/hda4 1250 10011 70380765 f W95 Ext'd (LBA)
/dev/hda8 1250 2032 6289384+ 83 Linux /usr /dev/hda9 2033 2293 2096451 83 Linux /tmp /dev/hda10 2294 2554 2096451 83 Linux /var /dev/hda11 2555 2746 1542208+ 83 Linux / /dev/hda12 2747 3046 2409718+ 83 Linux /home /dev/hda5 3047 3189 1025860+ 83 Linux not used /dev/hda6 3190 3380 2048108+ 83 Linux not used /dev/hda7 3381 3670 2048108+ 83 Linux not used /dev/hda13 3671 6287 21021021 b W95 FAT32 D:/dev/hda14 6288 10011 29912998+ b W95 FAT32 E:我想把第5、6、7分区删除然后重新建立两个分区,分别安装oracle数据库程序文件和数据库文件,我用fdisk是这样操作的:
QUOTE:# fdisk /dev/hda
The number of cylinders for this disk is set to 10011. 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): d Partition number (1-13): 5
Command (m for help): d Partition number (1-12): 6
Command (m for help): d Partition number (1-11): 7
Command (m for help): w退出fdisk后才发现删错了,竟然把第5、7、9分区删除了!其中hda9共28G,里面存了好多有价值的东西,难受死我了!这才想起来fdisk在每一次删除分区后都会自动把后面的分区重新排序,即:删除第5分区时,第6分区变成5,第7分区成为6……
郁闷!……
天无绝人之路:我想到今天早上刚刚把hda的分区表备份了,并且放到了其它分区!也没有细想,把那个备份拿过来就开始恢复硬盘分区(别笑话我啊):
QUOTE:#dd if=hda-2006-03-21.mbr of=/dev/hda bs=512 count=1 #reboot重启电脑用fdisk再看分区表——没有效果!
怎么回事?从分区表开始想——太简单了——分区表只有512字节,其中只有64字节存储分区信息,开始的时候硬盘容量很小,64字节够用了,后来随着硬盘空间增大显得不够了,因此开始有了扩展分区,而我删除的分区正好都在扩展分区内!恢复mbr肯定是不行的了!
怎么办啊!!!从硬件管理器盯着我的hda看了半天!发现我删除的分区都是几个独立的空间,就想能不能重新建立我的逻辑分区表来恢复分区内容呢???一不做二不休,反正没有别的办法了,试试吧!
QUOTE:# fdisk /dev/hda
The number of cylinders for this disk is set to 10011. 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): n First cylinder (3047-10011, default 3047):Using default value 3047 Last cylinder or +size or +sizeM or +sizeK (3047-3189, default 3047):Using default value 3047
Command (m for help): n First cylinder (3381-10011, default 3670):Using default value 3670 Last cylinder or +size or +sizeM or +sizeK (3381-3670, default 3670):Using default value 3670
Command (m for help): n First cylinder (6288-10011, default 628:Using default value 6288 Last cylinder or +size or +sizeM or +sizeK (6288-10011, default 10011):Using default value 10011
Command (m for help): t Partition number (1-14): 14 Hex code (type L to list codes): b
Command (m for help): w接下来该干什么呢?按照常规应该是mkfs.vfat啦!可是为什么呢?如果只是建立分区表来恢复数据,那么这么做不就是重新建立文件分配表了吗?!绝对不行!
还是先看看吧。
QUOTE:#mount -t vfat -o iocharset=utf8 /dev/hda14 /mnt/tmp/ #cd /mnt/tmp/ #ls哈哈!!!大功告成!终于又看到那些文件了!
重新启动电脑进入windows也看到了分区E:,里面的东西也是完好无损的在那儿呆着呢!
由此我更加信任linux系统了,工具虽小但是很实用!也很强大。同时这件事情提醒我在以后的使用中注意要细心,注意一些细节问题!