16GB USB Drive Not Accessible
Christopher A. Williams
chriswfedora at cawllc.com
Sat Nov 1 01:42:54 UTC 2008
On Fri, 2008-10-31 at 11:52 -0600, Phil Meyer wrote:
> Christopher A. Williams wrote:
> > ...
> >
> > Now, one last question: what's the flag to format a FAT32 partition with
> > mkfs? I saw options for pretty much everything but that. I'm probably
> > just suffering from not having had my first cup of coffee... :)
> >
>
>
> I deal with this often, as its part of my job to produce bootable pen
> drives and CF cards. I like using pungi and revisor to roll a product
> specific distro, and using livecd tools for copying them to the pen drives.
>
> Most of this is scripted for convenience, but all new drives go through
> a process like this:
>
> Stomp on the MBR:
>
> cat /usr/lib/syslinux/mbr.bin >/dev/${disc}
>
> That particular file is a generic GPL MBR. Its part of the syslinux rpm.
>
> Run fdisk to delete all partitions and recreate just what is necessary
> -- the script for that is kinda hard to read unless you are intimate
> with fdisk, so I won't post it here to prevent confusion.
>
> Be sure to tag the primary (assuming 1 here) partition as bootable.
>
> Then to format:
>
> mkfs -t vfat -F 32 -n "$name" /dev/${disc}1
>
> Some vendors like to really mess with their thumb drives, requiring a
> bad sector check during format. Add a -c to the above for that. It
> takes a bit longer, but might help on a stubborn drive.
Exactly what I was looking for - thanks a bunch!
Cheers,
Chris
--
=========================================
"In theory there is no difference between theory and practice.
In practice there is."
--Yogi Berra
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