[rescue] zuluscsi wide sca80 or scsiknife sca as replacement to hd in sun ultra 60

[Dave McGuire]

On 5/27/26 10:15, Mouse via rescue wrote:
>> It's not an emulator when it's being used as an ordinary mass storage
>> device.  When it's configured with a tape device, that *is* an
>> emulation, since it's faking the tape semantics, like move forward,
>> move backward, write tape mark, etc.
> 
> Philosophical question, and I mean this as a discussion start rather
> than as anything even vaguely along the lines of "that's wrong!" (if
> for no other reason than that I would use the same terminology):
> 
> Why is it emulation when something presents those semantics backed by a
> file on an SD card, but not when backed by rust-coated plastic?
> 
> Especially when it's not emulation to present a mass-storage device
> interface regardless of whether it's backed by a file on an SD card or
> rust-coated metal platters?

   SCSI-attached tape uses the SCSI tape command set, which recognizes 
the concept of a linear tape that moves back and forth, a sequential 
access storage device...and it *moves the tape back and forth*.  A 
ZuluSCSI implementing tape functionality fakes that sequential behavior 
backed by a file on a random-access storage device.  That is emulation.

   "Rust", sigh.

             -Dave

-- 
Dave McGuire, AK4HZ
New Kensington, PA