On Wed, May 26, 2021 at 2:35 PM Zane Healy <heal...@avanthar.com> wrote: > > One question, do I need to worry about the batteries on the H3602-SA panel? > I can’t imagine that this would be causing any issue. >
Yes, you do need to worry about the Ni-Cad battery pack on the H3602-SA panel. Remove it and throw it away. If it hasn't started leaking and causing corrosion yet it is only a matter of time before it does. I have removed all of the Ni-Cad battery packs from all of the VAX systems I have. > An interesting thing about the BA430 backplane is that in addition to > the M7626 KA660 CPU DSSI bus being present on the 50-pin connector, it > is also present on the C/D connectors, and the BA430 backplane routes > the DSSI bus on slot 1 C/D connectors to the DSSI storage device bays > without the need for a DSSI cable. > > I finally found that, in the “KA660 CPU System Maintenance” manual. What’s > interesting is that there is also a 50-pin header on the KA660, and I’m not > yet clear on why. :-) > The M7626 KA660 VAX 4000-200 was available in BA430 and BA215 enclosures. VAX 4000 Model 200 (BA215) Installation, Order Number EK-432AB-IN-002 https://manx-docs.org/collections/antonio/dec/MDS-2000-01/cd1/VAX/432ABIN2.PDF In the BA430 enclosure the KA660 DSSI bus is connected to the DSSI bus on the backplane through the KA660 C/D connectors, and nothing is connected to the 50-pin DSSI connector on the front of the KA660 module. In the BA215 enclosure the DSSI bus is cable based and connects to the 50-pin DSSI connector on the front of the KA660 module.