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


From: Christoph Hellwig
Subject: [Qemu-devel] Re: [PATCH 08/12] block: Catch attempt to attach multiple devices to a blockdev
Date: Sat, 26 Jun 2010 12:11:46 +0200
User-agent: Mutt/1.3.28i

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?

> Device usb-storage deliberately attaches twice to the same blockdev,
> which fails with the fix in place.  Detach before the second attach
> there.

Can anyone explain what the hell usb storage is actually trying to do
with the two drives?




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