Subject: Re: Snapshot report - 29 Jan tar_files
To: Alistair G. Crooks <>
From: Michael L. VanLoon -- Iowa State University <>
List: current-users
Date: 02/03/1994 08:41:51
>[ucbvax seemed to bounce this yesterday, and as I haven't seen it
>appear on the list yet, I'm sending this again.  I apologise if you
>see this twice. - agc]
>Snapshot report.
>Me: (Alistair G. Crooks)

>7. SCSI boards - what exactly is supported? Michael Van Loon's been
>having trouble with a BusLogic 747 (someone suggested the drive may
>be at fault, not the controller, but not confirmed as yet, and not
>much comfort to Michael either, I should think).

As of yesterday, my machine is booting and running beautifully off the
BusLogic 747 and the SCSI drive.  I'm approaching a full day of uptime:
 8:29am  up 19:35,  6 users,  load average: 2.86, 3.02, 2.91
running X, a make in /usr/src, a build of emacs 19.22 and a 9600 baud
kermit connection the entire time.

There are some crusty parts in the current bt742a.c driver on current,
and I'm working on a bastardization of the current driver, Julian's new
SCSI driver from magnum, the Mach 2.5 driver, and the FreeBSD driver.
(Actually, they're all just different version of the same thing, but
the newer ones have some fixes for a big problem.)

The problem had to do with allocating the mailbox and ccb structs just
anywhere in kernel memory, which means they could cross a page
boundary without knowing it.  This can prove to be fatal, as in my
case.  The fix is to make sure they start at a page boundary and don't
get too big that they cross over into another.  Updated driver coming

>3. What are the current ftp sites for -current binaries?
> - up and running fine
It was until I broke my system with the new SCSI hardware. ;-)  I'll
try to get it back up soon, though I may only update it weekly,
instead of daily like I was doing.


    Michael L. VanLoon  --  --  gg.mlv@isumvs.bitnet
 Iowa State University of Science and Technology -- The way cool place to be!
   Project Vincent Systems Staff, Iowa State University Computation Center