[Info-vax] Unexpected error using ZIP for OpenVMS

[AEF]

On Dec 29 2011, 9:22 am, Paul Sture <p... at sture.ch> wrote:
> On Wed, 28 Dec 2011 18:10:43 -0800, AEF wrote:
> > On Dec 28, 9:04 pm, AEF <spamsink2... at yahoo.com> wrote:
> >> On Dec 28, 1:30 am, Steven Schweda <sms.antin... at gmail.com> wrote:
> > [...]
> >> Oh, another limit: VMS backup block sizes, and two different ones: one
> >> on tape and a smaller one on disk! 65535 and 32767. This led Carl
> >> Lydick to always warn people not to use block sizes higher than what
> >> could be on disk so that copying a save set to disk wouldn't break it.
> >> And if you exceed the limits you should expect problems!
>
> > Actually I believe the limit on disk is effectively 32256.
>
> > Sorry for the goof.
>
> Tip. If you get brain fade and can't remember that number, give BACKUP
> 32000, and it will work it out itself.
>
> I suppose there's no guarantee that this behaviour will remain in future
> versions of BACKUP, but it's worked ever since I first started using
> TK70s.  (IIRC there was a hardware constraint with the combination of
> TK50 and VAXstationn 2000 which set the limit at 16K.)
>
> --
> Paul Sture

I'm sure it will be close enough. As long as it doesn't go too big! I
think 32000 is pretty safe.

Thank you.

AEF