You use a backup.
UNIX != Windows != OSX
On Mon, Jul 07, 2008 at 05:48:31AM -0600, macintoshzoom wrote:

quoted text
> I deleted a directory from an OpenBSD slice from my 2nd HD, and I need

> to recover a single file.

>

> I tried : http://myutil.com/2008/1/15/undelete-unrm-for-openbsd-4-2-with-dls

> but  failed :

>

> # dls /dev/wd1x > /xxx/xx/undelete.bin

> Sector offset supplied is larger than disk image (maximum: 0)

>

> Help & thanks.