[Sugar-devel] Unbootable machine

[Bernie Innocenti]

El Sun, 30-08-2009 a las 09:20 -0700, H. Peter Anvin escribió: 
> On 08/30/2009 04:41 AM, Luke Faraone wrote:
> > On Sun, Aug 30, 2009 at 07:25, Jonas Smedegaard <dr at jones.dk
> > <mailto:dr at jones.dk>> wrote:
> > 
> >     makebootfat not only formats with disk geometry that *is* right, but
> >     also use a handcrafted MBR which has a higher chance of *looking*
> >     right by various BIOSes - both when looking for USB-FDD, USB-ZIP and
> >     USB-HDD.
> > 
> > Now, by *right*, do we mean not only that but also something that meets
> > the criteria of
> > http://wiki.laptop.org/go/How_to_Damage_a_FLASH_Storage_Device#How_to_win (without
> > the problems caused by
> > http://wiki.laptop.org/go/How_to_Damage_a_FLASH_Storage_Device#Screwed-up_formatting)?
> > 
> > 
> > I'm not too familiar with how USB flash works, so I don't know if
> > USB-{FDD, ZIP, HDD} layouts are compatible with the layout you'd want to
> > minimize wear.
> > 
> 
> Wear leveling needs to be done in a separate layer if you're doing to
> use a conventional filesystem.

I didn't know it was even possible to peel the built-in FTL of USB
sticks and use them as bare NAND devices suitable for MTD or UBI.

-- 
   // Bernie Innocenti - http://codewiz.org/
 \X/  Sugar Labs       - http://sugarlabs.org/