Re: [linux-lvm] Strange file system errors

[Heinz Mauelshagen <mauelshagen redhat com>]

On Wed, Jan 14, 2004 at 12:35:09PM +0100, Kai Weber wrote:
> Hi,
> 
> if I have to reboot my system without a clean shutdown the recovered
> filesystems are corrupt. Files which I edited recently and maybe not yet
> written to the buffer are recovered with no or corrupt contents. 
> 
> For example:
> 
> $ ls -l config
> -rw-------    1 bond     bond        19622 Jan 14 12:04 .config
> $ stat config
>   File: `config'
>   Size: 19622           Blocks: 0          IO Block: 4096   regular file
> Device: fe01h/65025d    Inode: 20967432    Links: 1
> Access: (0600/-rw-------)  Uid: ( 1000/    bond)   Gid: ( 1000/    bond)
> Access: 2004-01-14 12:27:01.000000000 +0100
> Modify: 2004-01-14 12:04:16.000000000 +0100
> Change: 2004-01-14 12:04:16.000000000 +0100
> $ cat config
> $ less config
> "config" may be a binary file.  See it anyway?
> ^ ^@^ ^@^ ^@^ ^@^ ^@^ ^@^ ^@^ ^@^ ^@^ ^@^ ^@^@
> [...]
> $ strace -e write cat config
> write(1, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 4096
> write(1, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 4096
> write(1, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 4096
> write(1, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 4096
> write(1, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 3238) = 3238
> 
> I can force this error by pressing the reset button with an open file in my
> text editor. It seems to have nothing to do with the underlying file
> system. I have XFS and ext3 partitions. I would like to know, if it is a
> LVM problem. 

No.

> 
> Kernel 2.6.1
> LVM version:     2.00.08 (2003-11-14)
> Library version: 1.00.07-ioctl (2003-11-21)
> Driver version:  4.0.0
> 
> -- 
>   Kai Weber
> » kai weber glorybox de
>   http://www.glorybox.de
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm sistina com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen Sistina com                           +49 2626 141200
                                                       FAX 924446
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