Subject: Re: DSSI 5-pin power connector
To: Charles H. Dickman <chd_1@nktelco.net>
From: Chuck McManis <cmcmanis@mcmanis.com>
List: port-vax
Date: 05/26/2003 20:15:57
DSSI Drives takes a "long" time to come ready. They do a full environmental 
calibration run before going on-line. Doesn't really matter how you shut 
them down. The "right" way to use them is to push the 'run' switch and spin 
them down before powering off your system.

--Chuck

At 06:27 PM 5/26/2003 -0400, you wrote:
>Lord Isildur wrote:
>
>>yes you can... i actually just made some adaptors by snugly fixing some 
>>heavier stranded wire into the sockets on the 5-pin connector, ignored 
>>the 5th pin, and the wired a 4pin connector to it- to do a nondestructive 
>>modification, in case i ever wanted the dssi connectors again (not very 
>>likely)..
>>isildur
>>
>>On Wed, 21 May 2003, J. Buck Caldwell wrote:
>>
>>
>>
>>>I've got a BA213 with the funky 5-pin power connectors. I'm looking to 
>>>fill up the case with modern SCSI drives. What is the pinout for that 
>>>drive - can I hack off the 5-pin, tape up the blue wire, and solder on a 
>>>standard 4-pin power connector?
>>>
>>>
>OK.....
>
>Lets reverse this.... say I have a DSSI drive and want to connect it to a 
>4 pin power connector....
>
>I have already done this, and by connect +5 to the extra pin, the drive works.
>
>It also will not start fast enough to autoboot NetBSD on an MVIII at power up.
>
>What I have is a KA650 processor and a KFQSA DSSI adapter connected to an 
>RF71 drive. If I "SET BOOT DUA0" and then cycle power, the boot fails with 
>a timeout. Another "BOOT DUA0" then succeeds.
>
>So...
>
>Since power fails on the drive abruptly without the ACLO warning, is the 
>drive rechecking some integrity on restart before it allows a system to 
>boot from it? This is all in a BA23 chassis, so I think that the ACLO 
>signal is available on one of the power supply headers.
>
>I was hoping to use the MVIII as a terminal/console server, 2 DHV11's give 
>me plenty of ports, but a console server needs to boot on its own without 
>any help to be really useful.
>
>-chuck
>
>