In <4e4e7773.20...@acm.org>, on 08/19/2011
   at 09:47 AM, "Joel C. Ewing" <jcew...@acm.org> said:

>The requirement was that a physical block not be less than 18 bytes. 

Yes, and the requirement was not universal. I no longer recall the
densities and recording modes for which there was an 18-byte CIG
issue.
 
-- 
     Shmuel (Seymour J.) Metz, SysProg and JOAT
     ISO position; see <http://patriot.net/~shmuel/resume/brief.html> 
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)

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