Re: RF74 Disk

Andrew Ball <[email protected]>
Newsgroups gmane.os.netbsd.ports.vax
Message-ID <CACHVeKm8fsUcwoC2+WnHy19Z+XPSqvASD2mp-6euGFT6BTiNVw@mail.gmail.com>
  ASB> It's not critical but the completionist in me would love to
     > know that the disks I create in the emulator could be dumped
     > onto their physical counterparts and not hang off the end.

   PK> Yes, that's what you'd expect from emulated disk container
     > files.  But that will be true so long as the sector count
     > matches, given that you'd just be using dd or equivalent.  If
     > you were actually using at the physical device at the physical
     > recording level you'd likely see all sorts of other stuff not
     > visible to software, like spare sectors, block remapping, and
     > fun stuff like that.  If you were building a plug-compatible
     > RF74 emulation (a device that could plug into an RF74
     > controller) you'd have to worry about that, like David
     > Gesswein's famous MFM disk emulator.  But for virtual disks you
     > see none of that.

A sector count would suffice.  I haven't been able to find one though.
-Andy.
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