luth-astro{at}earthlink.net wrote:
 
>    at 08:20 PM, Felix Miata  said:
 
> >Every HD requires a valid MBR to boot, regardless of controller type.
 
> Kinda beside the point if the BIOS says there is no HD there.

Depends why it says that. DaniS506.ADD and IBM1S506.ADD both find IDE
controller attached HDs when the BIOS says NONE, as long as the
controller is enabled and the devices are properly jumpered. The
motherboard BIOS is required only to get a boot device bootstrapped, and
only if there there are no "SCSI" devices with a boot BIOS.
 
> >My Promise controller works just fine with DaniS506.ADD.
 
> POST knows nothing about DaniS506.ADD, right?

This is true, as it would be for any kind of proprietary driver that
might ship on an accompanying CD for any OS. No kind of driver can do
anything before some OS loads one.
 
> >A promise IDE controller is considered by both the system BIOS and
> >the OS to be a SCSI device.
 
> Interesting.

Same as any modern host controller installed in a PCI slot. Promise is
not unique in this regard.
 
> >you'll need to set the BIOS to NONE for devices connected to it.

> I'll look again for that kind of setting.

Some other options that might be there are AUTO, LARGE, and specific
values for cylinders, heads & sectors. On older BIOS this was always the
first screen. In newer ones it's typically down a layer or a second
screen.
-- 
"For since the creation of the world God's invisible qualities -- his
eternal power and divine nature -- have been clearly seen, being
understood from what has been made, so that men are without excuse."
                                                Romans 1:20 NIV

 Team OS/2 ** Reg. Linux User #211409

Felix Miata  ***  http://members.ij.net/mrmazda/partitioningindex.html



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