[Comm] secure erase on journalized filesystems

[Artem]

Maxim Tyurin пишет:

>On Sat, Jan 31, 2004 at 01:15:50AM +0200, Artem wrote:
>  
>
>>А как в альтах с этим дело обстоит?
>>    
>>
>
>Стандартно 
>man shred 
>
>P.S. Сабж в ФИДО просьба оставить.
>  
>
>------------------------------------------------------------------------
>
>  
>
Хм... именно там и написано, что:

> CAUTION:  Note  that  shred relies on a very important assumption: 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 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, Ext3, etc.)
>
>        *  filesystems  that  write  redundant  data  and carry on even 
> if some
>        writes
>
>               fail, such as RAID-based filesystems
>
>        * filesystems that make snapshots,  such  as  Network  
> Appliance's  NFS
>        server

Иначе бы я такого вопроса не задавал.