[Info-vax] OpenVMS Hobbyist licence - howto

[Michael Kraemer]

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.

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.