Cannot Open /dev/raw/raw1

[Sidney Abrahams]

Can anyone tell me why the error:
"Cannot open /dev/raw/raw1" occurs.
I am using a database called D3 on Linux Redhat Enterprise WS4 which is
supposed to write its data into an existing partition mounted as /opt and on
boot up that partition is bound to /dev/raw/raw1.
Is this a permissions problem?
I tried making d3 owned by root but the same error occurred.

-----Original Message-----
From: redhat-install-list-bounces at redhat.com
[mailto:redhat-install-list-bounces at redhat.com] On Behalf Of Rick Stevens
Sent: Thursday, September 29, 2005 01:25 PM
To: Getting started with Red Hat Linux
Subject: Re: grub install/setup oddity

On Wed, 2005-09-28 at 11:51 -0400, Mark J Strawcutter wrote:
> Dell PE2850, RHEL4 AS installed from scratch.
> 
> /dev/sda and /dev/sdb identically partitioned
> 
> sda1 and sdb1 are md1 raid1 mounted /boot
> sda2 and sdb2 are swap
> sda3 and sdb3 are md3 raid1 mounter /
> 
> grub installed on sda as part of installation, systems booting fine.
> 
> In grub shell did:
> 
> device (hd0) /dev/sdb
> root (hd0,0)
> setup (hd0)
> 
> all worked fine without error.  But when I try to boot /dev/sdb I get
thrown into
> interactive grub (ie get grub prompt).  Even more interesting is that I
can, at
> this point, manually enter the root/kernel/initrd commands that are in the
> grub.conf menu entry, followed by "boot" and the system comes up.
> 
> I then went into grub shell and did the device/root/setup commands on
/dev/sda
> and now it, too, throws me into interactive grub.
> 
> This says the install process "installed" grub differently than the
device/root/setup
> sequence is doing - the question is, different how?
> 
> BTW - I tried running "grub-install /dev/sdb" and get:
> 
> /dev/md1 does not have any corresponding BIOS drive.

This is a BIOS weirdie.  In BIOS, the first bootable drive is given the
BIOS device value of 0x80.  The second drive is 0x81 and so on.  The
problem here is that you've set things up to boot from /dev/sdb (BIOS
drive 0x81) but the BIOS still wants to use device 0x80 (/dev/sda).

> Any suggestions what to try?  Thanks

Take a look at the "--device-map" options in grub to see how to fix the
mapping.

----------------------------------------------------------------------
- Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
- VitalStream, Inc.                       http://www.vitalstream.com -
-                                                                    -
-      Always remember you're unique, just like everyone else.       -
----------------------------------------------------------------------

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