Re: [Qemu-devel] Re: [PATCH 08/12] block: Catch attempt to attach multiple devices to a blockdev

[Markus Armbruster]

Christoph Hellwig <address@hidden> writes:

>Markus Armbruster <address@hidden> writes:
>
>> Christoph Hellwig <address@hidden> writes:
>>
>>> On Fri, Jun 25, 2010 at 06:53:28PM +0200, Markus Armbruster wrote:
>>>> For instance, -device scsi-disk,drive=foo -device scsi-disk,drive=foo
>>>> happily creates two SCSI disks connected to the same block device.
>>>> It's all downhill from there.
>>>
>>> And from some quick testing a while ago the thing seems to actually
>>> work.  Not that I think that it is a good idea, but do we want to change
>>> behaviour in that respect?
>>
>> Valid question.  I'd answer yes.  It's an easy error to make, and likely
>> to end in massive file system corruption in the guest.
>
> I suspect a modern distro in the guest will detect it as a multi-path setup.

Really?  The guest sees two disks, different serial numbers, possibly on
different buses (one could be SCSI, the other iDE).

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