[Info-vax] BACKUP to the null device

[Bob Koehler]

In article <alpine.LFD.2.00.1102090949490.6967 at libra.gmcl.internal>, Rob Brown <mylastname at gmcl.com> writes:
> 
> I mean that this behaviour of NL: in BACKUP is undocumented.
> 
> Do you disagree?

   I think BACKUP's behaviour is fully documented and not specific to
   the NL: device.  Try it on the TT: device, sometime.  Try it on
   an MBA:.  The behaviour of /save_set and when it is or is not on
   by default is fully documented.  What BACKUP is doing when it is or
   is not making a save set is fully documented.

   It is not necessary to document each and every device if the
   documentation is already sufficient to predict how it will handle
   the device.  In the cited cases, it is.