[Info-vax] DEC Disk Naming - differences between DS-RZ1DB-VW and DS-RZ1DF-VW

[Phillip Helbig---undress to reply]

In article <kk1cm0$af0$1 at dont-email.me>, Stephen Hoffman
<seaohveh at hoffmanlabs.invalid> writes: 

> > Can anyone tell me what the difference is between the DS-RZ1DB-VW and 
> > DS-RZ1DF-VW drives? Will they happily co-exists in a HBS on V7.3-1?
> 
> If the block counts match, you're good to go.  If the block counts 
> don't match, you'll need a different disk or an upgrade to V7.3-2 for 
> DVE/DDS.

Right.  If there is a basic problem, you'll get an error forming the 
shadow set, but no data will be overwritten or anything like that.

As long as the block counts match, no problem.  Only recently have I had 
identical disks as far as the name.  (Different disks might have 
different speeds, i.e. time to complete a WRITE, so a WRITE to the 
shadow set will be as slow as the slowest disk, so it makes sense to 
match them up.)