[Info-vax] BACKUP to the null device

[Bob Gezelter]

On Feb 8, 2:38 pm, hel... at astro.multiCLOTHESvax.de (Phillip Helbig---
undress to reply) wrote:
> 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?

Phillip,

In the second case, BACKUP does use RMS, with all of its facilities
(e.g., BACKUP .... node"username
password"::device:filename.type;version/SAVE_SET does work). In some
cases, I have documented that this can be used to improve performance.
To be specific, one can do the BACKUP to the local node via DECnet and
get improved performance (if the buffering factors and extend size;
particularly the extend size are higher for FAL).

- Bob Gezelter, http://www.rlgsc.com