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Date: Wed, 6 Apr 2011 13:46:33 +0100
Message-ID: <BANLkTimmaVguNPkEQX-_6On9Abo1DYWqpg@mail.gmail.com>
Subject: Re: [Qemu-devel] GSoC - QCOW2 <-> QED image converter
From: Stefan Hajnoczi <stefanha@gmail.com>
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To: Lyu Mitnick <mitnick.lyu@gmail.com>
Cc: Kevin Wolf <kwolf@redhat.com>, qemu-devel@nongnu.org

On Wed, Apr 6, 2011 at 12:13 PM, Lyu Mitnick <mitnick.lyu@gmail.com> wrote:
> Hello Stefan,
> "splitting hard disk images" feature depends on win32 file system. I am
> wondering
> whether it is suitable to implement in raw-win32.c??

No, raw-win32.c is not the right place to do this.

If I create a split file with VirtualPC under Windows 2000 and then
transfer it to my Linux host then QEMU should still be able to read
the file.  This feature is not tied to the host platform or file
system.

It is block/vpc.c that needs to handle this.  The first file can be
opened as normal because it has the header.  The code can detect that
the image file is split and simply open additional files as necessary.

Stefan