[Info-vax] Backup TK50 tapes

[Bob Koehler]

In article <kgb9r6$mac$2 at tdi.cu.mi.it>, supervinx <nessuno at libero.it> writes:
> Il Sat, 23 Feb 2013 13:39:34 -0500, Stephen Hoffman ha scritto:
> 
>> On 2013-02-23 17:41:38 +0000, supervinx said:
>> 
>>> Well, let's see again what I've understood...
>> 
>> 0) No one willing uses tape boot.
>> 
> Hmmm ... so why do boot tapes exist ?
> I know that booting from TK50 takes more than an hour ...
> But for an historical purpose I'll save those tapes.

   They existed because there was nothing better at the time.  No one
   willingly used them because they were painfully slow.  Similated tapes
   on SIMH are probably several orders of magnitude faster.

   In addition to BACKUP vs. COPY, you need to be aware that SIMH
   simulated tapes contain SIMH specific overhead.  There are utilities
   available for makeing these tapes from host disks files, but I've
   not seen one that I'm happy with.