Messages in this thread |  | | Date | Tue, 10 Sep 2002 11:42:57 -0700 | From | Patrick Mansfield <> | Subject | Re: [RFC] Multi-path IO in 2.5/2.6 ? |
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On Tue, Sep 10, 2002 at 10:21:53AM -0700, Patrick Mochel wrote: > > > > > Generic device naming consistency is a problem if multiple devices > > > > show up with the same id. > > > > > > Patrick Mochel has an open task to come up with a solution to this. > > > > I don't think this can be solved if multiple devices show up with the same > > id. If I have five disks that all say I'm disk X, how can there be one > > name or handle for it from user level? > > Easy: you map the unique identifier of the device to a name in userspace. > In our utopian future, /sbin/hotplug is called with that unique ID as one > of its parameters. It searches for, and finds names based on the ID is. If > the name(s) already exist, then it doesn't continue. > > > -pat
But then if the md or volume manager wants to do multi-path IO it will not be able to find all of the names in userspace since the extra ones (second path and on) have been dropped.
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