dcopy (1M) doesn't work properly on Sys V/386 or Sys V/AT

[Karl Lehenbauer]

Microport Sys V/AT dcopy doesn't work because it's compiled small model
and hence can only dcopy trivially small file systems.

Bell Tech 386 dcopy doesn't work between unlike-sized partitions. (at least, 
maybe like-sized too.  It's a valid thing to do according to the manuals)
The resultant partition fails fsck sanity checks prior to phase 1.  I
presume this is a problem with all 386 versions.

Karl
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-- Karl Lehenbauer, karl at sugar.uu.net aka uunet!sugar!karl, +1 713 274 5184