[mod.computers.vax] Two UDA50s on one Unibus

haynes@ucscc.UUCP.UUCP (07/22/86)

We have a 780 and are trying to run two UDA50s on one Unibus. (I know we
aren't spozed to, but we need the disk space more than we need the
performance).  The problem is getting it to configure - it doesn't autoconfigure,
and if we run sysgen by hand it then recognizes the controller but not the
drive on it.  For a while it worked, supposedly because we put the uda50
at the 'correct' Unibus address, but this afternoon it stopped working even
tho we didn't change the address.  So it was probably working all along because
of something we did unwittingly, and we don't know what it is.

Jim Haynes
...ucbvax!ucscc!haynes
haynes@ucscc.bitnet

DCOTTLER%rca.com@CSNET-RELAY.ARPA (Dan Cottler) (07/22/86)

>We have a 780 and are trying to run two UDA50s on one Unibus...
>The problem is getting it to configure - it doesn't autoconfigure,
>and if we run sysgen by hand it then recognizes the controller but not the
>drive on it.  For a while it worked, supposedly because we put the uda50
>at the 'correct' Unibus address, but this afternoon it stopped working even
>tho we didn't change the address.  So it was probably working all along because
>of something we did unwittingly, and we don't know what it is.

We also have a 780 (VMS) with two UDA50s on one uni.  The only time the 
second one doesn't autoconfigure is when it needs care and feeding from
Field Service...  UDA50s don't seem to do much yelling when they start 
failing.

				- Dan Cottler
				<dcottler%rca.com@csnet-relay.arpa>