Charles A Edwards wrote: > > On Sun, 28 Apr 2002 22:09:23 +1000 > Ron Stodden <[EMAIL PROTECTED]> wrote: > > > That is not the problem. Most BIOSs provide no ability to select > > beyond HDD0 .. HDD4, if that, for booting. Usually only HDD0 and > > HDD1, ie booting is limited to IDE0. > > Ron, while much of the above is true, where you are in error is that even that even >though your add-on card is for ide devices it comes with its own bios and the system >sees and addresses it as a scsi device. > > If in your system BIOS you set SCSI as first boot device,(it can be 2nd or 3rd if >you wish to have floppy or cdrom as 1,2) then you can boot without problem from the >first hd connected to the pci controller card. > > What you can not do is boot from multiple deices attached to the card, > but only from the first bootable device attached.
Charles, your claim that a Promise add-on card is bootable as a SCSI device is true. Thankyou for this information. However, I disagree with you when you claim the Promise card to be a SCSI device - it just could not be, and that is confirmed by its non-appearance as a SCSI device in cdrecord -scanbus. SCSI controllers are themselves usually addressable directly as LUN 7 on a SCSI bus. Rather, I think Promise has worked a kloodge in that by watching the PCI bus the card can detect an attempt to do a SCSI boot and its BIOS responds with an IDE boot to the first IDE device encountered. What happens when there is also a real SCSI adaptor with a hard disk I do not know. This SCSI bootability was not mentioned in the documentation that came with my Promise controller. The above applies for an add-on Promise card. When there is a Promise chip on the motherboard I would expect the same behaviour. and I will confirm that on another machine I have and let you know. -- Ron. [au]
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