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Date:      Wed, 24 Jul 1996 12:50:44 -0700 (PDT)
From:      "JULIAN Elischer" <julian@ref.tfs.com>
To:        richardc@CSUA.Berkeley.EDU (Veggy Vinny)
Cc:        joerg_wunsch@uriah.heep.sax.de, current@FreeBSD.ORG, questions@FreeBSD.ORG
Subject:   Re: bootstrap
Message-ID:  <199607241950.MAA06454@ref.tfs.com>
In-Reply-To: <Pine.PTX.3.91.960722130825.11997n-100000@soda.CSUA.Berkeley.EDU> from "Veggy Vinny" at Jul 22, 96 01:11:02 pm

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> 
> 	Just tried it as disklabel -B wd0 but no luck... I'm using a 
> Western Digital WDAC31600 Caviar EIDE HD in LBA mode under -current and 
> in the Booteasy menu, when I hit F2 for FreeBSD, it just redisplays the 
> Booteasy menu again in a loop.....  Is there a way I can fix this?
> 
> Here is my fdisk wd0 output:
> 
> root@bigbang [1:06pm][/usr/home/vince] >> fdisk wd0
> ******* Working on device /dev/rwd0 *******
> parameters extracted from in-core disklabel are:
> cylinders=3148 heads=16 sectors/track=63 (1008 blks/cyl)
> 
>  Figures below won't work with BIOS for partitions not in cyl 1
> parameters to be used for BIOS calculations are:
> cylinders=3148 heads=16 sectors/track=63 (1008 blks/cyl)
> 
> Warning: BIOS sector numbering starts with sector 1
> Information from DOS bootblock is:
> The data for partition 0 is:
> sysid 6,(Primary 'big' DOS (> 32MB))
>     start 63, size 1031121 (503 Meg), flag 0
>         beg: cyl 0/ sector 1/ head 1;
>         end: cyl 785/ sector 63/ head 15
> The data for partition 1 is:
ok, so let's do some arrithmetic....

with 63 x 16 geometry, block 1031184 is

cyl 1024
sector 1 (first sector...)
head 0

> sysid 165,(FreeBSD/NetBSD/386BSD)
>     start 1031184, size 2142000 (1045 Meg), flag 0
>         beg: cyl 785/ sector 1/ head 0;
>         end: cyl 785/ sector 63/ head 15

You are instructin the bios to look at cyl 785, sector 1 head 0
this misses by some 239  cylinders..
 This assumes your bios can USE 1024 cyls.. most can't

> The data for partition 2 is:
> <UNUSED>
> The data for partition 3 is:
> <UNUSED>
> 
> Vince
> 
> 




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