GEOM weirdness with SD flash reader?

[Nate Lawson]

Poul-Henning Kamp wrote:
> In message <4688786F.5080408 at root.org>, Nate Lawson writes:
>> M. Warner Losh wrote:
> 
>> Nope, dmarck is right.  The reader was inserted "empty", then the media
>> was added.  It took a write to the device (maybe via the mount attempt
>> of /dev/da2) to trigger a re-taste.
> 
> Actually you only need to open it for write, I usually use:
> 
> 	true > /dev/da2

Ok.

> The problem here is, quite simply, that nobody tells GEOM that a card
> has been inserted.
> 
> opening for a write and then closing it forces a retaste because metadata
> blocks could have been written.
> 
> The correct fix for this is to have scsi_da tell geom that the card
> was inserted.

It doesn't get an interrupt or anything.  The only way to find media is
now present is through polling.  I suggested in another reply how to do
this from userland.  I just tested that method and it works.

-- 
Nate