UC07 with BA350/RZ28 disk spinup problem

I've got an Emulex UC07 Qbus-SCSI Controller which I want to use with
my MicroVAXII in conjunction with a BA350 shelf with RZ28 disks.

The UC07 formats and verifies all RZ28 disks without problems, but when
I boot VMS, all of the RZ28 disks are reported to be "offline" when I
try to access them.

After a while I found out that RZ28-VA disks (those in SBBs for the
BA350 shelf) wait for a SCSI START UNIT command to spin up. My UC07
seems not provide that command and I didn't find a way to configure it
that way.

The RZ28 manual says that these disk can be jumpered for automatic
spinup without START UNIT, but all jumpers are connected the a fragile
flat cable inside the SBB. It is impossible to
access the jumper needed without removing the whole cable.

I'd really like to know how to have the disks spun up without
manipulating the whole jumper block. Automatic SCSI-ID setting
(postion-dependant in the BA350) would be lost as well as the LED
status lights.

Ulli

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