Thanks, Leyne and Helen. I am going to try the latest version. Hope this can be the solution.

> Recently I find the nbackup is very very slow. For my 40G database, it takes

> almost 24 hours to finish the 0 level, for the rest levels it also takes several
> hours.

>>NBackup should run at near raw HDDs performance levels -- 100mb/s.

Which means normally, for 40G database, it should take 10 minutes to finish.

Hi Dmitry

>Did you try playing with the -D switch for nbackup?

I do not understand this parameter and can not find any documentation about it.  What does this direct I/O mean? Does it help anything?