---------------------<snip>-----------------
The M field in a MCCHHHHR is the extent number. Once I've got a DCB
pointing at the correct volume I construct a MCCHHRR corresponding to
the TTTR that I want within that volume using the normal methods. I
don't understand how the 'M' has a bearing on which volume I'm talking
to.
-----------------<unsnip>--------------------
Last I knew it was still MBBCCHHR, thanks to the peculiar addressing
required for the old 2321 Data Cell Drive.
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