Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!henry.jpl.nasa.gov!elroy.jpl.nasa.gov!gryphon!turnkey!jackv
From: jackv@turnkey.gryphon.COM (Jack F. Vogel)
Newsgroups: comp.unix.i386
Subject: Re: ISC disk driver bug?
Message-ID: <6404@turnkey.gryphon.COM>
Date: 19 Dec 89 16:35:55 GMT
References: <654400003@cdp> <6700047@adaptex> <258C899B.28434@paris.ics.uci.edu> <1926@crdos1.crd.ge.COM> <258D393B.1670@paris.ics.uci.edu>
Reply-To: jackv@turnkey.gryphon.COM
Organization: Turnkey Computer Consultants, Westchester, CA
Lines: 23

In article <258D393B.1670@paris.ics.uci.edu> baxter@ics.uci.edu (Ira Baxter) writes:
 
[ ..... discussion of controller problem deleted....]

>..... W1-1,2, handling "latched" mode (unfortunately, the
>docs *don't* say what this does), and W1-5-6, which disables cache
>control.  If the cure is disabling the cache, then the point of buying
>the controller was wasted.  I'm waiting for WD to tell me what
>"latched" mode does.
 
No need to wait for WD, latched mode doesn't do much of anything. It controls
whether the drive select signal is "latched" or not. For instance, on a 1003 I
think it is hardwired (not sure but any of them I've seen were set up that
way). The visible evidence of this mode is that the drive select light on
the drive last selected will stay on, whereas when its off and no drive is
selected no drive light will be on.

Exciting, right :-}?

-- 
Jack F. Vogel			jackv@seas.ucla.edu
AIX Technical Support	              - or -
Locus Computing Corp.		jackv@ifs.umich.edu