[Qemu-devel] QEMU 0.12.3 and SCSI boot

[Gerhard Wiesinger <lists@wiesinger.com>]

Hello,

I'm having trouble booting from SCSI adapter 53C895a and e.g. INT13h OS 
like MS-DOS 6.22.

I downloaded and installed the option ROM with -option-rom 8xx_64.rom:
http://www.lsi.com/DistributionSystem/AssetDocument/files/support/ssp/sdms/Bios/lsi_bios.zip

I'm seeing that Harddisks are installed well and that also "PCI boot ROM 
succesfully installed" message appears. So that part looks good as DDIM 
(Device Driver Initialization Model) has been implemented.

Also booting (sometimes) and sometimes access works until nearly 
immediatly the following problems occour (repeated messages with different 
Tags):
lsi_scsi: error: Reselect with pending DMA
scsi-disk: Tag 0x0 already in use
paio_remove: aio request not found!

So it seems to me that there is some incompatibility with the ROM and the 
SCSI emulation (busmaster DMA?) and INT 13h.

BTW: Booting Knoppix 6.2 Live CD without any option ROM and even with 
option ROM works well with SCSI disks (at least reading from them without 
any errors on the console, i guess because of own drivers and not INT13h 
access).

Any ideas to fix that issue and to bugfix it?

Thanx.

Ciao,
Gerhard

--
http://www.wiesinger.com/