Re: Deleting the file securely

[Steve Lord <lord@sgi.com>]

On Thu, 2002-02-21 at 04:03, Eugene Onischenko wrote:
> Hello,
> 
> There is shred utility for deleting files securely but in shred manual is 
> written:
> "The following  are  examples  of filesystems on which shred is not effective:
> * log-structured or journaled filesystems, such  as  those supplied with
> AIX and Solaris (and JFS, ReiserFS, XFS, etc.)
>                                     ^^^
> 
> Is there a tool for deleting the file securely on xfs?

The shred man page says this:

 CAUTION: Note that shred relies on a very important  assump-
     tion:   that  the filesystem overwrites data in place.  This
     is the  traditional  way  to  do  things,  but  many  modern
     filesystem designs do not satisfy this assumption.  The fol-
     lowing are examples of filesystems on  which  shred  is  not
     effective:


XFS does overwrite data in place, so, as long as you are not worried
about people with special hardware reading overwritten data, shred
probably does the job.

Steve

> 
> -- 
> Best regards,
> person:  Eugene Onischenko 
> nic-hdl: EO1030-RIPE
-- 

Steve Lord                                      voice: +1-651-683-3511
Principal Engineer, Filesystem Software         email: lord@sgi.com