Re: [Qemu-devel] Boot order problem and disable iPXE/gPXE

[Gerhard Wiesinger]

On Fri, 6 Jan 2012, Kevin O'Connor wrote:
> I'm not sure what a SCSI rom would do with a CD drive.  My guess is
> that it wouldn't map it to a BIOS visible drive id at all, as there's
> no way to select an id with any assurance that it wont conflict with
> one chosen by the BIOS or another rom.  If QEMU can simulate this (and
> someone knows the command-line to do such) it would be an interesting
> test to see what the rom does.

As far as I remember from SCSI only systems one can just boot from CD 
drives, too. Order is SCSI id (starting with SCSI id 0, up to 7, 15, etc. 
depending on host adapeter).

Tried:
-drive file=KNOPPIX_V6.2CD-2009-11-18-DE.iso,media=cdrom,if=scsi,bus=0,unit=0
all other drives are afterwards.

Registers as CDROM, selecting Legacy Option ROM from boot menu, but can't 
boot:
Screen:
Booting from DVD/CD...
Boot failed: Could not read from CDROM (code 0003)

Log:
Booting from DVD/CD...
scsi_is_ready (drive=0x000fd920)
ata_pio_transfer id=0x000fd920 write=0 count=1 bs=18 buf=0x00006746
Read sector id=0x000fd920 dest=0x00006746
Device reports MEDIUM NOT PRESENT
scsi_is_ready returned -1
Boot failed: Could not read from CDROM (code 0003)

Ciao,
Gerhard

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