Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!hplabs!hpfcso!hpfcdj!king
From: king@hpfcdj.HP.COM (Mike King)
Newsgroups: comp.os.minix
Subject: Re: Hard Disk Problems with Ver 1.2.0
Message-ID: <19300001@hpfcdj.HP.COM>
Date: 28 Feb 90 20:41:47 GMT
References: <1990Feb23.152053.2497@ncsuvx.ncsu.edu>
Organization: Hewlett Packard -- Fort Collins, CO
Lines: 43


If you are using the at_wini.c disc driver in a version of 1.2 MINIX
then you probably have the same problem I just came across.

In at_wini.c there is a routine called copy_prt.  This routine copies
the partition table for a hard disc from an internal buffer into
a table that the wini driver uses in accessing the disc.  Note that
the block 0 of the disc, which contains the partition table, has all ready
been read into an internal buffer.

I found a bug in the copy_prt routine.  This may or may not be your
problem.  I don't know if the 1.2 copy I have had been hacked up
by someone else before I got it.

Notice the change is just multiplying the variable by 5, i.e 
in two places replace drive with drive*5.

The following is a diff of the old at_wini.c and the fix I put in.  This is
in the copy_prt routine in that file.

	FROM THE AT_WINI.C and the fixed AT_WINI.C
	------------------------------------------
               
509c509
< 	wn = &wini[i + drive + 1];
---
> 	wn = &wini[i + drive*5 + 1];
519c519
<   sort(&wini[drive + 1]);
---
>   sort(&wini[drive*5 + 1]);




Hope this fixes the problem,

Mike King

R&D Hardware Lab
Hewlett Packard - Graphics Technology Division
Fort Collins, Colo.
303-229-3989