Re: VaxStation 3100 Replacement Disk
From: Hans Vlems (hvlems.nieuw_at_zonnet.nl)
Date: Fri, 5 Sep 2003 21:12:13 +0200
"Chris Scheers" <email@example.com> schreef in bericht
> Hans Vlems wrote:
> > "Wolfgang Rupp" <firstname.lastname@example.org> schreef in bericht
> > news:bj578s$fjq41$2@ID-3131.news.uni-berlin.de...
> > > Randy Park <email@example.com> wrote:
> > > > VaxStations 3100/30
> > >
> > > Any SCSI disk <=1GB should do. Beware! 3100/20-76 have a bug that
> > > them from booting larger than 1GB disks under VMS. I forget what
> > > it is, but some logical wrap-around causes the boot loader to hickup.
> > >
> > > There is always the HP parts exchange, but that tends to be expensive
> > > disks (not so for KGPSA, though, I was positively surprised).
> > >
> > It is not a matter of a bug but rather a design limitation in the boot
> > in the 3100's that is causing this problem. The system will boot but if
> > or more parts of the bootstrap software happen to live above the 1 GB
> > then VMB cannot locate the software. As long as you are sure all
> > VMS software lives below 1 GB then a 3100 will happily boot from a 4 GB
> > disk.
> > Hans
> There is one other caveat:
> Make sure that your dump file is in the lower 1GB. I believe that the
> ROM routines are also used to write the dump file.
> You also need to be careful if the dump file gets extended.
Correct. Because of all these little things to remember it is perhaps just
as safe to pronounce that booting from a disk over 1.05 GB is just not
possible. It is perhaps not entirely technically correct but it is for sure
the safest way to go...