Jeste ext2

[Vaclav Ovsik]

On Wed, Sep 19, 2001 at 10:20:38PM +0200, Mgr. David Turai wrote:
> Dekuji vsem za predchozi odpovedi na tema smazane soubory fs ext2.
> Ptal jsem se na to proto, ze bych byl velmi nerad, aby mi jako
> administratorovi nekdo obnovil smazane soubory.
> Je mozne ucinne( neobnovitelne ) smazat soubory, aniz bych je nejprve
> prepsal nahodnymi byty ?

Ve fileutils 4.1 (nevim ve kterych distribucich uz je)
se jiz nachazi prikaz shred, ktery udela neobnovitelne smazani.
Prave dela opakovane prepisy (muzete rict nejake parametry)
Je tam ovsem take upozorneni:

    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, 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

    * filesystems that cache in temporary locations, such as NFS
      version 3 clients

    * compressed filesystems


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	Vaclav Ovsik		email: Vaclav.Ovsik na i.cz
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