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Note 6530.4  How mirror set redundancy is maintained under hardware mirr  4 of 4
AMCFAC::RABAHY "dtn 471-5160, outside 1-810-347-5160" 9 lines   2-APR-1997 06:28
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    Neat.  It is still 2N and no small write penalty.  Still not atomic
    without a wbc when done at the controller.  Someone ought to look at
    doing this at the host.  Recovery requires an extra spindle but that's
    a mixed blessing -- it spreads the load but could thrash against
    application I/O more.
    
    For even numbers, is the traditional pairing superior?  For odd numbers
    larger than 3, would a hybred be interesting?  My idea would be to form
    all pairs and one set of 3 with the staggered layout.