From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50184) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XK176-0002FX-2X for qemu-devel@nongnu.org; Wed, 20 Aug 2014 04:19:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XK16w-0003RE-B8 for qemu-devel@nongnu.org; Wed, 20 Aug 2014 04:19:24 -0400 Received: from mail-wi0-x22a.google.com ([2a00:1450:400c:c05::22a]:34724) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XK16w-0003R3-4A for qemu-devel@nongnu.org; Wed, 20 Aug 2014 04:19:14 -0400 Received: by mail-wi0-f170.google.com with SMTP id f8so6296313wiw.3 for ; Wed, 20 Aug 2014 01:19:13 -0700 (PDT) Sender: Paolo Bonzini Message-ID: <53F459FD.2050108@redhat.com> Date: Wed, 20 Aug 2014 10:19:09 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <1406636839-11946-1-git-send-email-tumanova@linux.vnet.ibm.com> <1406636839-11946-2-git-send-email-tumanova@linux.vnet.ibm.com> In-Reply-To: <1406636839-11946-2-git-send-email-tumanova@linux.vnet.ibm.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 1/4] hd-geometry.c: Integrate HDIO_GETGEO in guessing for target-s390x List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Ekaterina Tumanova , Public KVM Mailing List Cc: cornelia.huck@de.ibm.com, dahi@linux.vnet.ibm.com, borntraeger@de.ibm.com Il 29/07/2014 14:27, Ekaterina Tumanova ha scritto: > The new HDIO_GETGEO logic is required for two use cases: > a) Support for geometries of Direct Attached Storage Disks (DASD) > on s390x configured as backing of virtio block devices. Is this still relevant now that QEMU can emulate 512-byte sectors on top of host devices with 4k sectors? > b) Support for FCP attached SCSI disks that do not yet have a > partition table. Without this patch, fdisk -l on the host would > return different results then fdisk -l in the guest. Can you provide an example? Paolo