[Info-vax] BACKUP to the null device

[Phillip Helbig---undress to reply]

In article <alpine.LFD.2.00.1102081327020.13023 at libra.gmcl.internal>,
Rob Brown <mylastname at gmcl.com> writes: 

> > Whu does BACKUP to NL:FOO.BAR give the error %BACKUP-F-INVDEVTYP but 
> > to NL:FOO.BAR/SAVE_SET work?  If the error is correct in the first 
> > case, why doesn't it apply in the second, since in both cases the 
> > target is a file with the same device, directory, name, type and 
> > version?
> 
> I am going to wave my hands and guess that it is because NL: is not a 
> tape device, the only device type for which you are not required to 
> specify "/SAVE_SET".  Let's call it an "undocumented permanent 
> restriction".

I never have to specify /SAVE_SET, even on disk, if I don't want a save 
set.  But that doesn't work either.