> Another one:
>
> nbackup -? lists a '-D [ON | OFF]' option, which says
>
> "Use or not direct I/O when scanning database"
>
> What does this option actually do? I could not find any documentation about it.
>

Is it so hard to ask google about direct IO ? :)

In two words - this is ability to work with disk data (almost) not using filesystem cache

Regards,
Vlad