[Info-vax] VAX 6000 on Young Sheldon

[Tony Priborsky]

On Wednesday, February 8, 2023 at 1:27:34 PM UTC-8, Bob Eager wrote:
> On Wed, 08 Feb 2023 19:19:30 +0000, Scott Dorsey wrote: 
> 
> > IBM guys would not have. My boss would have said that if it can't back 
> > up the DASDs with the CPU halted than it wasn't a real mainframe.
> I know it was probably later on, but couldn't you do that with MSCP disks?

Yes, the HSC50 had a direct disk-to-tape backup utility that didn't require the CPU.   Consistency was your problem so it was mostly used off line.  The system operated a TU78 tape drive at absolute max speed.  Forward write speed was almost rewind speed.  You could always tell when it was running by the sound of the vacuum columns.