[Info-vax] VAX 6000 on Young Sheldon

[Arne Vajhøj]

On 2/11/2023 11:08 AM, Tony Priborsky wrote:
> 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.

Did it generate a backup in VMS Backup format or did
it just dump physical disk blocks to tape blocks?

Arne