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Re: SCSI-Problem

From: Christoph Plattner
Subject: Re: SCSI-Problem
Date: Fri, 30 Nov 2001 00:21:35 +0100


we could communicate in German, but we want to stay international ....

First of all try a current version of GRUB (0.90, CVS snapshot, etc...)

The BIOS has a config, if to boot from SCSI or IDE. This setting also
GRUB, as (hd0) is an IDE disk or a SCSI disk (SCSI first). So the
simplest way 
is to do the BIOS setup to have SCSI first, then boot from floppy.
On the command line of GRUB use

        setup (hd0) (hd0,0)

to install GRUB on the first BIOS disk, which is the SCSI now.

To do a setup via GRUB from Linux, and if you have no special kernel
used for reordering the disk devices, then the best way is to use map
like `/boot/grub/device.map' with the contents of

(hd0) /dev/sda
(hd1) /dev/sdb
(hd2) /dev/hda
(hd3) /dev/hdb or hdc

This file is read by `/sbin/grub' and used for the device mapping. With
setup and the activated BIOS option to have SCSI first, everything has a
consistent view.

Bye (Mfg)
Christoph P.

Christian Stalp wrote:
> I have a really serious problem with Grub. Grub cannot read from my SCSI-HD!
> It is paticulary striking (is this the right word;-) that GRUB cannot find the
> directory /boot/grub and the stage1 and 2 on the SCSI-disk!
> My System;
> AMD K6-II 400Mhz
> FIC 2013  2MB cache
> Dawicontrol 2980U2W with a (NCR)-Symbios 83c895
> Harddisk 1: Samsung 8.4GB IDE
> Harddisk 2: Seagate 8.4GB IDE
> Harddisk 3: Seagate 18,3GB U160 (SCSI-ID: 0)
> Harddisk 4: IBM 9,3GB U2W (SCSI-ID: 1)
> On the IDE-disks are SUSE-Linux7.0 and Windows.
> On the first SCSI-disk is a Debian Linux 2.2 installation which I want to make
> it as main-system. I want to install GRUB on this first SCSI-disk (seagate) 
> and
> want to boot everything from it!
> Therefore is (hd0) the samsung IDE-HD and so on.
> Month before I made a grub-bootdisk (floppy) but I dont know how :-(((
> With this I made a setup (hd2) to the first SCSI-disk. When I changed the
> boot-prirority to SCSI first, Grub started but made a read-error. Maybe it
> could not find stage2? But what is very strange is that grub-shell on the
> floppy can't find  /boot/grub/stage1 or 2 on the SCSI-Disk! I copyed that 
> files
> also on the SuSE-bootdir and Grub has no problem to find it. I have this files
> also on the floppy and of course it can find it at first.
> Now I made an other Grub-floppy via dd. I disk without a filesystem. The 
> source
> was: grub-  With this I cannot even try to make a setup. :-(((
> It would be <very> very </very> nice if you can help me
> Thank you
> Gruss Christian
> --
> Christian Stalp                           address@hidden
> Wiesbaden / Germany                       address@hidden
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