Dave Horsfall dave at horsfall.org
Fri Sep 13 15:54:32 AEST 2019

On Thu, 12 Sep 2019, Larry McVoy wrote:

> But here is an SCCS win.  SCCS has a 16 bit ignore the carry bit 
> checksum over the whole file.  RCS has none of that.

Giggle...  I found I could actually *edit* an SCCS file, provided I reset 
the checksum to zero (it was then recalculated).

> B) NFS errors.  So all NFS implementations, Suns included, had a bad 
> habit of returning a block of nulls.  I dunno why but that is a thing. 
> The SCCS checksum would detect that.  RCS and CVS did not have a 
> checksum so when NFS returned garbage, they were happy to return that to 
> you.

I believe that NFS is much more reliable now (yes, it used to be awful).

-- Dave

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