first step getting VAX 6000-400 booted ...

From: Carlini, Antonio <Antonio.Carlini_at_riverstonenet.com>
Date: Wed Oct 24 18:56:00 2001

        Peter Wallace wrote:

>Something I remember on RA81s is that you have to go from
>controller --> cable --> bulkhead connector --> cable --> disk
>
>if you go directly from controller to disk, you end up with pins
swapped
>and things dont work (but nothing hurt)

        I think the rule is you have an *odd* number of
        connecting cables - since each cable swaps.

        So in a MicroVAX 3600 you can go directly from
        KDA50 controller to RA7x internal drive. Or you
        can go from KDA50 to bulkhead, bulkhead to
        bulkhead on next cab (e.g. storage array) and
        from there a third cable goes internally from
        bulkhead to final drive.

        In the case of a 6000 typically you go from
        KDB50 (or KDM70) to bulkhead on 6000 chassis.
        Then 6000 chassis to Storage Array chassis.
        Then internally there is a cable from the
        Storage Array bulkhead to the drive itself.

        I don't know how the wiring was done for
        those later kits that allowed RA9x and/or
        RA7x drives to live in the bottom of
        the VAX 6000 chassis.

        Antonio
Received on Wed Oct 24 2001 - 18:56:00 BST