Re: 分区表坏了，大家给点意见
On Tue, 22 Nov 2005 22:04:33 -0500
ailantian@email.jlu.edu.cn wrote:
> 大家好，
> 我的是debian unstable，昨天晚上动了一下分区表，
> 结果弄坏了一个分区，我现在的分区表数据如下
> vax:/home/ailantian# fdisk -l
>
> Disk /dev/hda: 40.0 GB, 40020664320 bytes
> 255 heads, 63 sectors/track, 4865 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
> Device Boot Start End Blocks Id System
> /dev/hda1 * 1 500 4016218+ 83 Linux
> /dev/hda2 501 4865 35061862+ 5 Extended
> /dev/hda5 501 1009 4088511 83 Linux
> /dev/hda6 1010 1073 514048+ 82 Linux swap / Solaris
> /dev/hda7 1074 2289 9767488+ 83 Linux
> /dev/hda8 2290 3640 10851876 83 Linux
> /dev/hda9 3641 4865 9839781 83 Linux
> vax:/home/ailantian#
> 我以前的hda1和hda2是合在一起的，装的是windows昨天我把他拆成了两个分区，就是现在的hda1和hda2
> 我是直接用fdisk把所有的分区删除以后重建的，我开始是把各个分区扇区的地址都记住了的，重建的时候只是
> 把原来的第一个windows分区拆分成现在的hda1和hda2,重新起动以后发现其他的各个分区的数据都还在
> 可是hda7的数据读不出来了，mount的时候一开始的时候是说需要指定文件系统类型，就是说认不出来reiserfs分区了
> 后来我装了testdisk，试了很多都不管用，
> 然后又reiserfsck重新build-tree和build-sb,--check都不管用了，我来我想是不是testdisk没用，
> 我就直接把我在dev/hda1建了几个文本文件，然后把它的前64K都zero了，dd if=/dev/zero of=/dev/hda1 bs=64000
> 结果出现的问题和我的hda7问题一样，我尝试了各种方法也没法恢复，mount的时候也会提示错误，后来mkfs以后才能挂载，
> 我想我现在hda7上面的数据应该是还在的，可以我到底该怎么恢复呢？我现在hda8,9的数据都还在的，因为我现在的linux
> 系统就在hda9，请问大家有没有什么好意见，谢谢大家
我的错误主要如下
vax:/home/ailantian# reiserfsck /dev/hda7 --fix-fixable
reiserfsck 3.6.19 (2003 www.namesys.com)
*************************************************************
** If you are using the latest reiserfsprogs and it fails **
** please email bug reports to reiserfs-list@namesys.com, **
** providing as much information as possible -- your **
** hardware, kernel, patches, settings, all reiserfsck **
** messages (including version), the reiserfsck logfile, **
** check the syslog file for any related information. **
** If you would like advice on using this program, support **
** is available for $25 at www.namesys.com/support.html. **
*************************************************************
Will check consistency of the filesystem on /dev/hda7
and will fix what can be fixed without --rebuild-tree
Will put log info to 'stdout'
Do you want to run this program?[N/Yes] (note need to type Yes if you do):Yes
###########
reiserfsck --fix-fixable started at Tue Nov 22 22:53:44 2005
###########
Replaying journal..
Reiserfs journal '/dev/hda7' in blocks [18..8211]: 0 transactions replayed
Checking internal tree..
Bad root block 0. (--rebuild-tree did not complete)
Aborted
vax:/home/ailantian# reiserfsck /dev/hda7 --rebuild-tree
reiserfsck 3.6.19 (2003 www.namesys.com)
*************************************************************
** Do not run the program with --rebuild-tree unless **
** something is broken and MAKE A BACKUP before using it. **
** If you have bad sectors on a drive it is usually a bad **
** idea to continue using it. Then you probably should get **
** a working hard drive, copy the file system from the bad **
** drive to the good one -- dd_rescue is a good tool for **
** that -- and only then run this program. **
** If you are using the latest reiserfsprogs and it fails **
** please email bug reports to reiserfs-list@namesys.com, **
** providing as much information as possible -- your **
** hardware, kernel, patches, settings, all reiserfsck **
** messages (including version), the reiserfsck logfile, **
** check the syslog file for any related information. **
** If you would like advice on using this program, support **
** is available for $25 at www.namesys.com/support.html. **
*************************************************************
Will rebuild the filesystem (/dev/hda7) tree
Will put log info to 'stdout'
Do you want to run this program?[N/Yes] (note need to type Yes if you do):Yes
Replaying journal..
Reiserfs journal '/dev/hda7' in blocks [18..8211]: 0 transactions replayed
###########
reiserfsck --rebuild-tree started at Tue Nov 22 22:55:51 2005
###########
Pass 0:
####### Pass 0 #######
Loading on-disk bitmap .. ok, 8285 blocks marked used
Skipping 8285 blocks (super block, journal, bitmaps) 0 blocks will be read
Could not find a hash in use. Using "r5"
"r5" hash is selected
Flushing..finished
Read blocks (but not data blocks) 0
Leaves among those 0
Objectids found 2
Pass 1 (will try to insert 0 leaves):
####### Pass 1 #######
Looking for allocable blocks .. finished
Flushing..finished
0 leaves read
0 inserted
####### Pass 2 #######
Flushing..finished
No reiserfs metadata found. If you are sure that you had the reiserfs
on this partition, then the start of the partition might be changed
or all data were wiped out. The start of the partition may get changed
by a partitioner if you have used one. Then you probably rebuilt the
superblock as there was no one. Zero the block at 64K offset from the
start of the partition (a new super block you have just built) and try
to move the start of the partition a few cylinders aside and check if
debugreiserfs /dev/xxx detects a reiserfs super block. If it does this
is likely to be the right super block version.
If this makes you nervous, try www.namesys.com/support.html, and for
$25 the author of fsck, or a colleague if he is out, will step you
through it all.
Aborted
vax:/home/ailantian# reiserfsck --rebuild-sb /dev/hda7
reiserfsck 3.6.19 (2003 www.namesys.com)
*************************************************************
** If you are using the latest reiserfsprogs and it fails **
** please email bug reports to reiserfs-list@namesys.com, **
** providing as much information as possible -- your **
** hardware, kernel, patches, settings, all reiserfsck **
** messages (including version), the reiserfsck logfile, **
** check the syslog file for any related information. **
** If you would like advice on using this program, support **
** is available for $25 at www.namesys.com/support.html. **
*************************************************************
Will check superblock and rebuild it if needed
Will put log info to 'stdout'
Do you want to run this program?[N/Yes] (note need to type Yes if you do):Yes
rebuild-sb: wrong tree height occured (65535), zeroed
Reiserfs super block in block 16 on 0x307 of format 3.6 with standard journal
Count of blocks on the device: 2441872
Number of bitmaps: 75
Blocksize: 4096
Free blocks (count of blocks - used [journal, bitmaps, data, reserved] blocks): 2441872
Root block: 0
Filesystem is clean
Tree height: 0
Hash function used to sort names: "r5"
Objectid map size 2, max 972
Journal parameters:
Device [0x0]
Magic [0x0]
Size 8193 blocks (including 1 for journal header) (first block 18)
Max transaction length 1024 blocks
Max batch size 900 blocks
Max commit age 30
Blocks reserved by journal: 0
Fs state field: 0xfa03:
FATAL corruptions exist.
some corruptions exist.
sb_version: 2
inode generation number: 0
UUID: b1fb9d0e-269b-4c36-b606-2430f5809729
LABEL:
Set flags in SB:
Is this ok ? (y/n)[n]: y
The fs may still be unconsistent. Run reiserfsck --check.
vax:/home/ailantian# vax:/home/ailantian# mount /dev/hda7 /mnt/
mount: Not a directory
vax:/home/ailantian#
最后mount的有些错误输不出来，不是标准错误也不是标准输出，没法重定向，不知道如何截取
> --
> hello sir ,
> I am a newbie
>
>
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--
hello sir ,
I am a newbie
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