[dm-devel] multipath affinity to SCSI

Benjamin Marzinski bmarzins at redhat.com
Wed Apr 27 20:10:55 UTC 2005


On Wed, Apr 27, 2005 at 07:11:33PM +0200, Lars Marowsky-Bree wrote:
> On 2005-04-27T13:00:51, "goggin, edward" <egoggin at emc.com> wrote:
> 
> > Has anyone tried multipathing to non-SCSI target devices, e.g., LOOP,
> > NBD, USB?  While the architecture looks fully capable of supporting
> > such, it looks like both the kernel and user implementation would have
> > some problems due to some SCSI affinity.
> 
> Well, I can see the user-space not auto-detecting the paths right now
> (probably because simply noone has added those features yet ;-), but the
> kernel shouldn't have any issues with it. I've played with it over loop
> devices for testing.
> 
> Which SCSI affinity are you referring to?

The multipath tools are SCSI-centric.  sysfs_devinfo() is a glaring example.

-Ben
 
> 
> Sincerely,
>     Lars Marowsky-Brée <lmb at suse.de>
> 
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> High Availability & Clustering
> SUSE Labs, Research and Development
> SUSE LINUX Products GmbH - A Novell Business
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