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From: "Matthew Jacob" <lydianconcepts@gmail.com>
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Cc: scsi@freebsd.org
Subject: Re: Quirk for this?
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> The question is: Given that I know that the first USB/CF adapter
> always reports one too big, is there a way this can be fixed?

There are two problems here that I see:

a) The GEOM taste code cannot be overridden.

b) How do we accomodate/detect broken h/w?

I'm inclined to think that GEOM stuff cannot/should not be "fixed".
The second question is the harder one.

You personally can fix this for yourself by doing your own specialized
quirk matching and just adjusting the READ CAPACITY results
accordingly. We have to ask whether this particular breakage is both
widespread enough and the devices important enough to try and
generalize some solution for.