It was pointed out to me that this is what Sun supplies in the
Sparc10.  Here's the format.dat from SunOS 4.1.3:
disk_type = "SUN1.05" \
        : ctlr = SCSI : fmt_time = 4 \
        : ncyl = 2036 : acyl = 2 : pcyl = 2038 : nhead = 14 : nsect = 72 \
        : rpm = 5400 : bpt = 43200
partition = "SUN1.05" \
        : disk = "SUN1.05" : ctlr = SCSI \
        : c = 0, 2052288 
Thanks to JanBerger.Henriksen@ii.uib.no
-e
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