[Info-vax] VMS startup - building LLA devices

[Marc Van Dyck]

Ian Miller used his keyboard to write :
> On Wednesday, March 15, 2023 at 4:18:37 PM UTC, Marc Van Dyck wrote:
>> Very early in the OpenVMS startup sequence, VMS builds the LLA (Lan 
>> failover) devices. Can someone tell me which file(s) the startup code 
>> gets the information from to do that ? 
>> 
>> -- 
>> Marc Van Dyck
>
> SYS$SYSTEM:LAN$DEVICE_DATABASE.DAT

That's also what I was thinking. But no. Let me explain.

I have a system disk residing on a SAN that I must be able to boot
from two different hardwares. One is a BL870, the other is an RX2800.
So I built two different LAN$DEVICE_DATABASE.DAT files, one for each
config, and before reboot, we put in place the one that will be in
effect after the reboot. Should work, right ? Well, it doesn't. The
RX2800 has only EIxx devices, the BL870 has EIxx and EWxx ones. If
I'm on the blade, rename files to reboot on the RX, I still see EXxx
devices in the LAN config after the reboot.

Also, in the doc, it is said that this file can be moved to an other
location by defining a logical name. But how can that work when the
LLA formation is done so early in the boot sequence, way before DCL
even exists ?

-- 
Marc Van Dyck