short-changed on SD card?

Jerry McAllister jerrymc at
Tue Feb 3 08:00:37 PST 2009

On Tue, Feb 03, 2009 at 07:37:05AM -0500, William Bulley wrote:

> According to Mike Jeays <mike.jeays at> on Mon, 02/02/09 at 19:38:
> > 
> > I think I would try dd if=/dev/zero of=/dev/da1 bs=1M
> > without the count option, and see how many blocks it writes. You at least 
> > start with a clean slate, and can run fdisk and newfs, if you want 
> > a BSD-only 
> > device. Make sure you write on the right device!
> So you don't think the "bad card reader" suggestion is relevant?

It is another thing to check.

> I will also try this approach.  Thanks for all the feedback.  Now,
> I've got some avenues of testing to work through.  Later...

Doing the dd has two nice possibilities.   One, it might just clear
the device up and two, it might give some information about the
honest size.    This is assuming, of course, that the problem is 
not the card reader.


> Regards,
> web...
> --
> William Bulley                     Email: web at
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