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Date: Thu, 3 Oct 2002 19:03:26 -0400 (EDT)
From: Alexander Viro <viro@math.psu.edu>
To: Greg KH <greg@kroah.com>
cc: Oliver Neukum <oliver@neukum.name>, Kevin Corry <corryk@us.ibm.com>,
       linux-kernel@vger.kernel.org, evms-devel@lists.sourceforge.net
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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