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Path: utzoo!mnetor!seismo!ll-xn!cit-vax!mangler
From: mangler@cit-vax.Caltech.Edu (System Mangler)
Newsgroups: comp.periphs
Subject: Re: booting 4.3bsd off System Industries 9751/9761 eagle disks
Message-ID: <2464@cit-vax.Caltech.Edu>
Date: Fri, 24-Apr-87 20:39:45 EST
Article-I.D.: cit-vax.2464
Posted: Fri Apr 24 20:39:45 1987
Date-Received: Sun, 26-Apr-87 00:52:22 EST
References: <250@uvicctr.UUCP>
Organization: California Institute of Technology
Lines: 18
Summary: can't use the 9761; try the 9751

Berkeley doesn't have any SI controllers, so they haven't maintained
the parts of hp.c that relate to SI controllers.  They haven't added
a SI9761 case to the switch statement, so you won't be able to boot
that drive, at all.  The case for SI9751D (direct mapped, RM05 drive
type) is still there, and you can try booting that.  But 4.3's error
recovery code does not work at all on SI controllers.  If you have
a bad block in the swap area, like we did, you won't get very far.
We were lucky; we had a friend who could compile a kernel for us.

You should set jumper W7A on the motherboard for Internal ECC, and
find an Eagle whose first 84,000 sectors can all be read correctly
with just hardware ECC.  The remaining errors will have to be
covered up by badsect(8) until you get the driver compiled, like
in the days before BAD144.  If you get a bad block in an inode
area, try telling newfs to allocate fewer inodes, or change the
cylinder group size.

Don Speck   speck@vlsi.caltech.edu  {seismo,rutgers,ames}!cit-vax!speck