From: Christian Borntraeger <borntraeger@de.ibm.com>
To: Alexander Graf <agraf@suse.de>
Cc: Heinz Graalfs <graalfs@linux.vnet.ibm.com>,
qemu-devel <qemu-devel@nongnu.org>,
Jens Freimann <jfrei@linux.vnet.ibm.com>,
Cornelia Huck <cornelia.huck@de.ibm.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Stefan Weinhuber <wein@linux.vnet.ibm.com>,
Einar Lueck <elelueck@de.ibm.com>
Subject: Re: [Qemu-devel] [PATCH 2/3] geometry detection: use HDIO_GETGEO
Date: Wed, 02 May 2012 20:49:25 +0200 [thread overview]
Message-ID: <4FA181B5.3010608@de.ibm.com> (raw)
In-Reply-To: <DB0C4BFB-75E6-4474-937E-61C9FF31F2DC@suse.de>
>>> Well, if guessing is a function
>>>
>>> guess_size(disk_size, block_size)
>>>
>>> then we would be able to do the same on an image file. Christian, would that work?
>>
>> I think that the geometry values can not always be guessed correctly based on
>> block_size and disk_size.
>>
>> Stefan, can you clarify that?
>>
>> If we cannot reliably guess the geometry based on blocksize and size, I still think
>> that we should use the host values, e.g. after checking that BIODASDINFO2 returns
>> successfully.
>
> Yeah, but only if it's always possible to force a specific geometry through the command line - otherwise reproducability suffers.
That is already possible, with the exception of the sector part of the geometry (see the other
patch :-) )
Christian
next prev parent reply other threads:[~2012-05-02 18:49 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1335448165-26174-1-git-send-email-borntraeger@de.ibm.com>
[not found] ` <1335448165-26174-2-git-send-email-borntraeger@de.ibm.com>
[not found] ` <4F9AC55F.5000101@redhat.com>
2012-05-02 10:18 ` [Qemu-devel] [PATCH 1/3] Fix geometry sector calculation Christian Borntraeger
2012-05-02 10:25 ` Paolo Bonzini
2012-05-02 10:50 ` Christian Borntraeger
2012-05-02 11:05 ` Paolo Bonzini
2012-05-02 11:07 ` Alexander Graf
2012-05-02 11:09 ` Paolo Bonzini
2012-05-02 11:10 ` Alexander Graf
2012-05-02 11:23 ` Paolo Bonzini
[not found] ` <1335448165-26174-3-git-send-email-borntraeger@de.ibm.com>
[not found] ` <4F9AC55D.3000904@redhat.com>
2012-05-02 10:27 ` [Qemu-devel] [PATCH 2/3] geometry detection: use HDIO_GETGEO Christian Borntraeger
2012-05-02 11:09 ` Alexander Graf
2012-05-02 11:26 ` Paolo Bonzini
2012-05-02 11:35 ` Alexander Graf
2012-05-02 11:38 ` Paolo Bonzini
2012-05-02 12:54 ` Alexander Graf
2012-05-02 14:27 ` Christian Borntraeger
2012-05-02 15:05 ` Alexander Graf
2012-05-02 18:49 ` Christian Borntraeger [this message]
2012-05-02 15:57 ` Stefan Weinhuber
2012-05-02 18:39 ` Alexander Graf
2012-05-02 11:56 ` Christian Borntraeger
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