format table of CDC 9720-850

[Jonathan Biggar]

Here is what I used on a 3/160 with a Xylogics 753 controller running
SunOS 4.0.1:

disk_type = "CDC EMD 9720-850" \
        : ctlr = XD7053 \
        : ncyl = 1377 : acyl = 2 : pcyl = 1379 : nhead = 15 : nsect = 67 \
        : rpm = 3600 : bpt = 41088 : bps = 613

I checked on our SparcStation running 4.0.3 and found an entry identical
to what you quoted.  I don't know why Sun's entry is different, but mine
works well.