From: Paolo Bonzini <pbonzini@redhat.com>
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: xen-devel <xen-devel@lists.xensource.com>
Subject: Re: [RFC] Virtual disk configuration, PV vs. emulated, backward compatibility etc
Date: Wed, 28 Jul 2010 14:31:59 +0200 [thread overview]
Message-ID: <4C50233F.3060209@redhat.com> (raw)
In-Reply-To: <1280246290.5872.8932.camel@zakaz.uk.xensource.com>
On 07/27/2010 05:58 PM, Ian Campbell wrote:
> The sd* syntax is not covered. It's unclear if this is used in the wild
> or what the existing semantics of emul= are for SCSI devices. If someone
> cares to investigate the existing behaviour then it can be added.
I don't know what semantics xl uses for SCSI devices, but I know that
we've seen bugs about SCSI emulation so it is sometimes used, and this
is the semantics that it should use given your IDE example:
sda => d0p0,pv=true,emul=scsi0.0,_vdevice=8:0
sdb => d0p0,pv=true,emul=scsi0.1,_vdevice=8:16
where the first number is the bus and the second is the unit as passed
to -drive. The second number goes from 0 to 7 (that's what QEMU does at
least).
Paolo
next prev parent reply other threads:[~2010-07-28 12:31 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-27 15:58 [RFC] Virtual disk configuration, PV vs. emulated, backward compatibility etc Ian Campbell
2010-07-27 16:50 ` Ian Jackson
2010-07-27 20:41 ` Pasi Kärkkäinen
2010-07-28 9:45 ` Ian Campbell
2010-07-28 12:31 ` Paolo Bonzini [this message]
2010-07-28 16:05 ` Ian Jackson
2010-07-28 16:45 ` Jeremy Fitzhardinge
2010-07-29 14:50 ` Ian Jackson
2010-07-29 15:07 ` Stefano Stabellini
2010-07-29 15:45 ` Ian Jackson
2010-07-29 15:59 ` Stefano Stabellini
2010-07-29 16:09 ` Ian Jackson
2010-07-29 16:14 ` Stefano Stabellini
2010-07-29 16:29 ` Jeremy Fitzhardinge
2010-07-29 16:34 ` Ian Jackson
2010-07-29 16:37 ` Jeremy Fitzhardinge
2010-07-29 17:54 ` Alan Cox
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