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[sindi keesan <keesan AT sdf.lonestar.org>]

This did not work any better than the initfs.gz.
Uncompressing linux....OK, booting the kernel.

I used the same scsifs.gz and bzimagsy.431 (kernel) on a computer with 
BL3.40 in a DOS IDE partition (hda1), where it worked.

loadlin bzimagsy.431 root=/dev/loop0 initrd=scsifs.gz rw

I checked md5sums to be sure.  I tried several times to boot from sda1.

I then tried putting the line with sda1 in linuxrc before the one with 
hda1 instead of after it in case mounting a nonexistent hda1 was the 
problem.   No help.

I have to delete linuxrc~ in order to unmount the file (without making it 
too large).

The new /initrd/dev/sda1 has a 0 in it where /dev/sda1 has a 6.
I did not specify either of these, just the b 8 1.  When I tried 
copying the dev it ended up the same way as with mknod, with a 0.

The scsifs.gz that I posted tries hda1 then sda1.

The computer complained when we tried to put in an IDE drive, wanted a 
Compaq diagnostic disk, but we could try again just so we would have loop 
BL3 on IDE with which to copy over BL to ext2 partitions.  One time I had 
to download and make a diagnostic disk, with help from tech support, for a 
486 Compaq computer.  I would prefer to have loop BL3 on the scsi drive 
where I can use it to fix things later.  The 2-floppy version does not 
access scsi drives.

Apart from adding /initrd/dev/sda1 and adding a section to linuxrc, is 
there something else I need to change to boot loop BL3 from scsi drive 
with my scsi kernel (which works to boot to ext2 scsi linux)?

We have three other scsi controllers and 9G, 8G and 2G drives, which 
appear to run linux faster than IDE drives.  I don't want to have to put 
in an IDE drive as well.

On Tue, 25 Jul 2006, sindi keesan wrote:

> To boot from a DOS partition on a scsi drive, first partition, replace
> initfs.gz with my scsifs.gz (http://keesan.freeshell.org/bl/scsifs.gz)
> which is 219 bytes larger.   (I could have made it smaller by deleting
> hda1-4, hdb1 hdc1 hdd1).  To boot from sda2 instead, you would need to
> make /dev/sda2 in scsifs.gz, and change linuxrc from sda1 to sda2.
> There was room only for two devices.  Delete /dev/hda* to make more space.
>
> Use a similar procedure to boot from a drive identified as /dev/hde4.
>
> I have not actually tested on the scsi drive but the scsifs.gz at least
> still boots on an IDE drive.
>
> > > Using my 2.4.31 scsi kernel with BL2 ramdisk or BL3 loop
> > >
> > >
> > > Uncompressing linux ...
> > > Ok, booting the kernel
> > >
> > >
> > > After this I eventually power off.
> > >
> > > I have booted to BL on scsi with the scsi 2.4.31 kernel, from a DOS
> > > partition on an IDE drive (loadlin).  Why can't I boot from a DOS
> > > partition on scsi drive with the same scsi kernel?
> >
> > Boot into ramdisk BL3 on an IDE drive.
> >
> > cd /DOS/baslin
> > cp initfs.gz scsi.gz
> > gunzip scsi.gz
> > mount -o loop initfs /mnt
> > cd /mnt
> > ls   - there are /bin, /dev, /proc, and a file linuxrc
> >
> > In dev there are hda1-4 hdb1-4 hdc1 hdd1 but no sda anything.
> > I will need to mknod /dev/sda1 (the DOS partition on the scsi drive from
> > which loop BL3.4 is being run).
> >
> > Do I also need sda2 and sda3 for loop linux?  They are linux ext2
> > partitions to which I want to copy files, but I think I have these devices
> > in the regular /dev/ directory of BL3.
> >
> > linuxrc is a batch file which checks for a /baslin directory on /dev/hda1
> > to hda4 and gives error messages if not found.  I need to change the first
> > to /dev/sda1 and delete the rest, for this computer.
> >
> > Umount mnt, gzip scsi, copy it to the scsi computer.
> > Copy boot.bat to scsi.bat and change initfs.gz to scsi.gz.
> > Boot BL3.40 loop with 'scsi' instead of 'boot', using a kernel with
> > built-in scsi support (scsi_mod and sd_mod).
> > Boot ext2 BL3.40 on that computer with the same kernel, root=/dev/sda2.
> >
> > Steven, perhaps you could, in the next BL, add an error message for people
> > who do not have a /dev/hda*, that suggests editing linuxrc and adding the
> > /dev for things like scsi drive, usb pen drive, optical drive, or whatever
> > else someone might try to boot from using another kernel with support for
> > that device.
> >
> > I will edit BL2 baslin.gz similarly.
> >
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> keesan AT sdf.lonestar.org
> SDF Public Access UNIX System - http://sdf.lonestar.org
>
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keesan AT sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org