Messages in this thread | | | Date | Thu, 3 Oct 2002 19:03:26 -0400 (EDT) | From | Alexander Viro <> | Subject | Re: [Evms-devel] Re: EVMS Submission for 2.5 |
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On Thu, 3 Oct 2002, Greg KH wrote:
> On Thu, Oct 03, 2002 at 11:02:36PM +0200, Oliver Neukum wrote: > > Perhaps this is a misunderstanding. > > You need to report changes of the actual physical medium of eg. a zip drive. > > How you want to do this from a class driver, I fail to see. > > When a "medium" goes away from the system, it is unregistered somehow, > right? So, in the disk class, that device would disappear, and cause > the /sbin/hotplug event. > > This is assuming that we can detect media changes, which is a whole > different topic that I don't want to get involved with :)
Our mechanism is retroactive. We can (kinda-sorta) tell "did the media change happen since the last time we'd asked". That's it. And even that is less than accurate - many drivers decide to be on the safe side and _always_ answer "yes, it did".
And yes, it sucks.
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