Help: CDC WREN IV on a Sun 3/60

[Chris Hermansen]

The machine I'm sending this from is a 3/60 with a Wren IV attached.  This
particular model is an older one, about 304Mb formatted, with embedded
SCSI controller.  From past experience, you can format in SunOS 3.4/3.5 as
EITHER an MD21 or Adaptec controlled device.  I spent several evenings
trying to sort this beast out; the CDC documentation is not particularly
helpful, so I tried lots of things (weirder as the night progressed).  By
the way, SunOS 4.0.x has a neat file called /etc/format.dat with
information on quite a few non-Sun devices (including Wren IVs and Vs).

The SCSI controller on this disk will do other amazing things, too; for
instance, you can use pretty much any sectors/track and related info as
long as the total number of bytes/disk is <= the actual number (honest!).

If your Wren IV is a bare ESDI device, please disregard all the above...

Chris Hermansen                         Timberline Forest Inventory Consultants
Voice: 1 604 733 0731                   302 - 958 West 8th Avenue
FAX:   1 604 733 0634                   Vancouver B.C. CANADA
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