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Date: Tue, 27 Oct 2009 17:47:21 +0100
From: Gerd Hoffmann <kraxel@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH 0/4] megaraid_sas HBA emulation
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To: Hannes Reinecke <hare@suse.de>
Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org

   Hi,

> The device can be accessed by
>
> -drive if=raid,file=XXX

Don't extend that qemu automagic please.  The new way to handle this is:

   -drive if=none,id=mydisk,file=/path/to/some/disk.img
   -device megasas,id=raid
   -device scsi-disk,bus=raid.0,scsi-id=1,drive=mydisk

> In order to support SCSI command emulation I had to update /
> patch up the existing SCSI disk support. This might be
> not to everyones taste, so I'm open to alternative
> suggestions.
>
> But I certainly do _not_ want to update the SCSI disk
> emulation, as this is really quite tied to the SCSI parallel
> interface used by the old lsi53c895a.c.

--verbose please.  I'd prefer to fix scsi-disk bugs and/or limitations 
instead of working around them.

> Plus it doesn't do scatter-gather list handling,

Which should be fixed anyway.

cheers,
   Gerd