cdboot, mfs_root and mount_cd9660

[Geoff Buckingham]

Just to answer my own query for the benefit of the archive.

My problem was caused by DMA being enabled for atapi devices in 
/boot/loader.conf removing 'hw.ata.atapi_dma="1"' fixed all my
woes. (This setting is not ther by default, i had picked it up from
my laptop config). 


On Wed, Jan 21, 2004 at 02:12:52PM +0000, Geoff Buckingham wrote:
> 
> I have now tried this with a 4.9 /boot and still see the same problem.
> 
> I also added the atacontrol binary to my mfs_root and tried detachng the
> ata channel with the cd re-attaching and re-initialising it.
> 
> I still get the same invalid argument error.
> 
> As I can't fix this with atacontrol can I assume the problem is with
> the initialisation of the kernel by the loader rather than the loader 
> leaving the cd in a unknown state?
> 
> How is the PXEboot which allows  mount_cd9660 to work differ from a no
> emulation cdboot?
> 
> Moved to stable as I am now 100% 4.x (was using /boot from 5.2 before)
> 
> 
> On Tue, Jan 20, 2004 at 10:45:54AM +0000, Geoff Buckingham wrote:
> > On Tue, Jan 20, 2004 at 09:23:47AM +0000, Geoff Buckingham wrote:
> > > 
> > > For reasons I wont bore people with, I am trying to produce a bootable CD
> > > using /boot from 5.2 (minus kernel and modules) boot a 4.9 kernel and
> > > mfs_root.
> > > 
> > > This works fine however once booted trying to mount the iso9660 fs from the
> > > CD produces the error:
> > > 
> > > cd9660: /dev/acd0c: Invalid argument
> > > 
> > > booting the same kernel and mfs_root bits from a 4.9 pxeboot via tftp I am able
> > > to succesfully mount the same CD on the same hardware (DL 360 G1)
> > > 
> > > Anyone know what I am doing wrong?
> > 
> > Should add this is a no emulation boot.
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