[Info-vax] Backup TK50 tapes

[Bob Koehler]

In article <kgj03k$2ke$1 at Iltempo.Update.UU.SE>, Johnny Billquist <bqt at softjar.se> writes:
> 
> Anyway, the problem with bootable tapes, at least on a PDP-11, is that 
> your tape starts with a boot block. That block is read into memory, and 
> the boot rom jumps into the code read in. This boot block on the tape is 
> outside of what is visible as files on an ANSI-labelled tape. So you 
> cannot see, or access this block except by doing low level reads from 
> the tape. Any tool like COPY is unable to see or access this data.

   Interesting.  On VAXen, bootable tapes tended to keep all thier files
   in ANSI labeled files.  Thus the earlier post the the TK started with
   VMB.EXE.