nanobsd disk info

[Michael W. Lucas]

On Mon, Mar 21, 2005 at 09:24:53PM +0100, Paul Schenkeveld wrote:
> Hi,
> 
> On Thu, Mar 17, 2005 at 11:51:07AM -0500, Michael W. Lucas wrote:
> > Hi,
> > 
> > I'm obviously missing something here.
> > 
> > I'm trying to get nanobsd on a 512Mb flash card.  The only changes
> > I've made are to set kernconf = net4801 in make.conf and to set the
> > Makefile disk geometry variables.  "make" chokes on the disk geometry,
> > so I'm assuming I've set it wrong.
> > 
> > My diskinfo shows as:
> > 
> > mwl-crash2~;sudo diskinfo -v da0
> > da0
> >         512             # sectorsize
> >         512483840       # mediasize in bytes (489M)
> >         1000945         # mediasize in sectors
> >         488             # Cylinders according to firmware.
> >         64              # Heads according to firmware.
> >         32              # Sectors according to firmware.
> 
> Somehow these numbers are not consistent:
> 
>   488 cyls * 64 heads * 32 secs = 999424 secs

Doh, of course.  I've never seen a hard drive lie to me before, didn't
occur to me to check these numbers.

> What does dmesg show about da0?

da0 at umass-sim0 bus 0 target 0 lun 0
da0: <Generic STORAGE DEVICE 0.01> Removable Direct Access SCSI-0 device 
da0: 1.000MB/s transfers
da0: 488MB (1000945 512 byte sectors: 64H 32S/T 488C)

I get the same results when I try on a separate machine.  I also get
the same results when I use a second identical flash card.

Any suggestions or pointers?  How can I deal with a flash card that's
obviously lying or brain-dead?  I apparently don't know the right
Google keywords, because I can't find a solution there...

==ml

-- 
Michael W. Lucas	mwlucas at FreeBSD.org, mwlucas at BlackHelicopters.org
		http://www.BlackHelicopters.org/~mwlucas/
	       Latest book: Cisco Routers for the Desperate
	        http://www.CiscoRoutersForTheDesperate.com