[Simh] VAX Tape Emulation?

[Johnny Billquist]

Heh. As a reference. I'm running an RSX system on simh with four 8G disks. No point in being cheap here.

  Johnny 


Zane Healy <healyzh at avanthar.com> skrev: (26 januari 2018 16:53:11 CET)
>Yes, I’m trying to preserve the data on hard drive from future hardware
>failures.
>
>I started out looking to backup to virtual tape.  I’m still looking to
>do that, but I’m now mainly looking to move the majority of the data
>off of the Physical Alpha, and to a Virtual VAX.  I hadn’t realized how
>big of virtual disks could be attached, so didn’t consider that a
>practical option.
>
>Last night I installed Linux on an old Core i5 system I’d picked up
>recently to run SIMH on.  Today I’ll try to get a new VAX system added
>to my cluster.  Unlike my other two virtual VAXen, this one is on a
>host with a 500GB drive (tiny by todays standards, but huge compared to
>the Alpha, or  where the other two virtual VAXen are running).
>
>Zane
>
>
>
>
>> On Jan 26, 2018, at 1:27 AM, Johnny Billquist <bqt at softjar.se> wrote:
>> 
>> Then I must have misunderstood the usecase. I thought you were
>looking at preserving a bunch of tapes from a future failure of the
>hardware.
>> 
>> Are you then looking at ways to perform backups of a physical system
>to virtual tape?
>> 
>> I would probably give the virtual machine a really big disk and run
>backup to that remote disk and not try to play with remote tapes.
>> 
>> Johnny 
>> 
>> 
>> Zane Healy <healyzh at avanthar.com> skrev: (26 januari 2018 02:54:20
>CET)
>> If it was applicable to the situation, then VMSTPC would work great. 
>It’s already installed on my Alpha, and I’m pretty sure there is a VAX
>binary for it in the VAX directory on there.  I also have it installed
>on my RSX-11M+.  It’s definitely a great tool.  Just not for this. :-)
>> 
>> Zane
>> 
>> 
>>  On Jan 25, 2018, at 2:54 PM, Armistead, Jason
><Jason.Armistead at otis.com> wrote:
>>  
>>  Zane
>>  
>>  The program that Johnny is thinking of is VMSPTC
>>  
>>  http://www.digiater.nl/openvms/decus/vax86a/bnelson/vmstpc/vmstpc.c
><http://www.digiater.nl/openvms/decus/vax86a/bnelson/vmstpc/vmstpc.c>
>>  
>>  Note sure if this is the latest, but it came up in the first set of
>Google search results for "VMSTPC"
>>  
>>  Good luck
>>  Jason
>>  
>>  
>>  -----Original Message-----
>>  From: Simh [mailto:simh-bounces at trailing-edge.com] On Behalf Of
>Johnny Billquist
>>  Sent: Thursday, 25 January 2018 5:48 PM
>>  To: Zane Healy; Tim Shoppa
>>  Cc: simh at trailing-edge.com
>>  Subject: Re: [Simh] VAX Tape Emulation?
>>  
>>  Zane - unless I remember wrong, there is a tool from DECUS to copy
>tapes to a file image, and then get that back to a tape again. The RSX
>version is called TPC, and I'm pretty sure it also exists for VMS.
>>  
>>  Using that, pull your physical tapes into files, copy the files over
>to the simulated machines, and write them back out to simulated tapes
>there.
>>  
>>    Johnny
>> 
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