Re: a hosed reiserfs

[Hans Reiser <reiser@namesys.com>]

Bruce Israel wrote:

>On Mon, Jun 28, 2004 at 10:46:05AM -0700, Hans Reiser wrote:
>  
>
>>www.namesys.com/support.html takes credit cards.  Thanks for being our 
>>customer.
>>    
>>
>
>OK, done.
>
>Here's the current situation:
>
>My partition doesn't mount.  reiserfsck says there are bad blocks.  The
>output of 'debugreiserfs' is as follows:
>
>    Filesystem state: consistency is not checked after last mounting
>
>    Reiserfs super block in block 16 on 0x2148 of format 3.6 with standard journal
>    Count of blocks on the device: 4885760
>    Number of bitmaps: 150
>    Blocksize: 4096
>    Free blocks (count of blocks - used [journal, bitmaps, data, reserved] blocks): 1095151
>    Root block: 9426
>    Filesystem is NOT cleanly umounted
>    Tree height: 4
>    Hash function used to sort names: "r5"
>    Objectid map size 602, max 972
>    Journal parameters:
>	    Device [0x0]
>	    Magic [0x4edee6b]
>	    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: 0x0:
>    sb_version: 2
>    inode generation number: 2033166
>    UUID: af13ddfc-8726-4732-bbf5-db17b6c6671d
>    LABEL: 
>    Set flags in SB:
>	    ATTRIBUTES CLEAN
>
>The partition table looks fine (and hasn't changed in the last 6 months or
>so). 
>
>I've tried running dd_rescue to copy the partition over; I've run it both
>forward and reverse.  Whenever I run it, it copies for a while and then
>hangs my system (Linux 2.6.5-gentoo-r1; also hangs a 2.6.3 kernel).
>
>When I say it hangs, I mean that all other shells and virtual consoles are
>non-responsive, and the only thing that works is the reset button on the
>front panel.
>
>I also tried /sbin/badblocks which hung the sytem as well.
>
>When I run dd_rescue forward, it copies about 4.5GB (out of 20GB total),
>before hanging, resulting in the following file:
>
>4511808 -rw-r-----    1 root     4615569408 Jul  2 23:50 hdf8
>
>I've also run it forward and then reverse on the same file.  It seems to
>only copy about 20 Meg or so in the reverse direction.  The most recent
>effort resulted in:
>
>4520612 -rw-r-----    1 root     20012073984 Jul  4 12:04 hdf8-2
>
>I've tried giving it starting byte counts of the size (or 1K less), but it
>still hangs, just a lot quicker.  Turning on dd_rescue's logging doesn't
>help; it appears that the system is locked up before anything is either
>written or flushed.
>
>This is a very slow process since I have to reboot after each time I run
>it. 
>
>What should I do?
>
>Bruce
>
>
>  
>
this is in the expertise area of flx and vitaly, so I must let them 
answer it.