From: John Haxby <john.haxby@oracle.com>
To: Stefan Bader <stefan.bader@canonical.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Subject: Re: Re: Question on "xen-blkfront: handle Xen major numbers other than XENVBD"
Date: Wed, 13 Jul 2011 18:25:21 +0100 [thread overview]
Message-ID: <4E1DD501.7030503@oracle.com> (raw)
In-Reply-To: <4E1DC57D.3010002@canonical.com>
On 13/07/11 17:19, Stefan Bader wrote:
>
> So for HVM they would be called hda in the cfg but sda in the domU.
Something like this caused a lot of confusion for folks around here:
they were expecting the _name_ used in the cfg to be the name in the
guest, ignoring the fact that neither hdX, xvdX nor sdX ever appear in a
Windows HVM. Or indeed that, IDE, SCSI and SATA disks are all called
sdX nowadays.
As Stefan said, the name actually only tells you what sort of emulated
controller the disk is attached to: hd for IDE, sd for SCSI and xvd for
PV disks (no actual controller as such). It might have been better to
have things like IDE(0,0), SCSI(0,3) and XVD(0) and let the guest OS
decide how to map those to names, much like it does for real hardware.
jch
next prev parent reply other threads:[~2011-07-13 17:25 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-13 9:50 Question on "xen-blkfront: handle Xen major numbers other than XENVBD" Stefan Bader
2011-07-13 10:47 ` Stefano Stabellini
2011-07-13 10:54 ` Ian Campbell
2011-07-13 12:14 ` Stefan Bader
2011-07-13 13:20 ` Stefano Stabellini
2011-07-13 13:45 ` Stefan Bader
2011-07-13 15:34 ` Stefano Stabellini
2011-07-13 16:19 ` Stefan Bader
2011-07-13 17:03 ` Stefano Stabellini
2011-07-13 17:25 ` John Haxby [this message]
2011-07-14 13:26 ` Stefan Bader
2011-07-14 13:30 ` [PATCH 1/3] xen-blkfront: Drop name and minor adjustments for emulated scsi devices Stefan Bader
2011-07-14 17:32 ` Stefano Stabellini
2011-07-14 13:30 ` [PATCH 2/3] xen-blkfront: Fix one off warning about name clash Stefan Bader
2011-07-14 17:33 ` Stefano Stabellini
2011-07-14 13:30 ` [PATCH 3/3] xen-blkfront: Fix minor offset calculation for emulated IDE disks Stefan Bader
2011-07-14 17:34 ` Stefano Stabellini
2011-07-15 6:23 ` Stefan Bader
2011-07-15 10:20 ` Stefano Stabellini
2011-07-15 10:41 ` Stefan Bader
2011-07-19 13:22 ` Konrad Rzeszutek Wilk
2011-07-19 16:22 ` Problem with Xen 4.1 on Ubuntu 11.10 ( Oneiric Ocelot) (HVM DomUs crash) Boris Derzhavets
2011-07-19 17:09 ` Konrad Rzeszutek Wilk
2011-07-19 17:57 ` Boris Derzhavets
2011-07-19 17:22 ` Stefano Stabellini
2011-07-19 18:01 ` Stefano Stabellini
2011-07-19 19:01 ` Boris Derzhavets
2011-07-20 8:19 ` Ian Campbell
2011-07-20 8:24 ` Boris Derzhavets
2011-07-20 10:45 ` Stefano Stabellini
2011-07-20 12:07 ` Boris Derzhavets
2011-07-20 12:11 ` Boris Derzhavets
2011-07-20 12:44 ` Stefan Bader
2011-07-20 15:03 ` Keir Fraser
2011-07-20 15:57 ` Boris Derzhavets
2011-07-20 15:59 ` Ian Campbell
2011-07-23 17:45 ` Boris Derzhavets
2011-07-28 17:58 ` Attempt to backport changeset-23088, changeset-23089 to Xen 4.1.1 Boris Derzhavets
2011-07-28 19:04 ` Keir Fraser
2011-07-28 19:41 ` Boris Derzhavets
2011-07-28 19:53 ` Keir Fraser
2011-07-28 21:50 ` Boris Derzhavets
2011-07-28 22:12 ` Keir Fraser
2011-07-28 22:02 ` Re: Attempt to backport changeset-23088, changeset-23089 to Xen 4.1.1- Notice of Ian Campbell Boris Derzhavets
2011-07-29 7:08 ` Stefan Bader
2011-07-29 9:30 ` Boris Derzhavets
2011-07-29 14:41 ` Boris Derzhavets
2011-07-21 8:01 ` problem with xentrace_format in Xen 4.0.1 Zhiyuan Shao
2011-07-19 19:44 ` Re: Problem with Xen 4.1 on Ubuntu 11.10 ( Oneiric Ocelot) (HVM DomUs crash) Boris Derzhavets
2011-07-14 14:14 ` Re: Question on "xen-blkfront: handle Xen major numbers other than XENVBD" Ian Campbell
2011-07-14 15:01 ` Stefan Bader
2011-07-14 14:48 ` Ian Jackson
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