[Info-vax] OpenVMS Hobbyist licence - howto

[John Santos]

In article <hh7t52$psg$03$1 at news.t-online.com>, M.Kraemer at gsi.de 
says...> 
> Bob Eager schrieb:
> 
> > Yes, I have a stock of DPES-31080. But an IBM 0662 was a fraction too 
> > big. Note that this was in terms of what the console firmware reported 
> > (too big, and it gave a silly small number, obviously the size modulo 
> > 1GB).
> > 
> > Another machine (VS model 60) tokk 4GB disks, but the IBM DDRS-34560 was 
> > too big before 'modification'.
> 
> These 1, 2 and 4GB limits are not uncommon with antique systems.
> Ultrix <4.2 can't cope with 1GB+ disks, no version of Ultrix
> supports partitions >2GB, HP-UX <=9 doesn't install on disks >2GB,
> etc etc.
> I wasn't aware the more modern VS4000 line has such limitations too.

I'm 99.99% certain it doesn't.  The 6-byte SCSI command limitation
only applied to the firmware on some early 3100's. IIRC.  All the
later systems used 10-byte SCSI commands.

> 
> Unfortunately disks often are a few MByte larger than the corresponding
> 2**n-1 limits, which results in the observed "wrap around" numbers.
> It seems you're using some "set blocksize" SCSI command to
> "shape" the disks accordingly.



-- 
John