CHDK: FAT16 chicanery & Mac OS X

[Mathew Lippincott]

I don't have immediate access to a PC or any sized SD card less than 4gb or more than 256mb.  Does anyone know how to successfully partition & Format a drive to FAT16 in MacOSX?

Here is what I tried with a 4gb card, and the results:

at the command line:


diskutil partitionDisk disk3 MBRFormat "MS-DOS FAT16" KINGSTON 4G

Error: -9962: The chosen size is not valid for the chosen filesystem



I got this error for every size partition, can't figure out how to sub-divide the card.  thoughts?


Mathew

[Jean-Baptiste LABRUNE]

did you try diskutil partitionDisk disk3 MBRFormat "MS-DOS FAT16" KINGSTON 4000M ?

also see http://www.liquidx.net/blog/2007/05/26/format-partition-as-fat16-on-mac-osx/

&& also limor's thread http://forums.adafruit.com/viewtopic.php?f=31&t=7108

cheers,

Jb

--

http://web.media.mit.edu/~labrune/

Jean-Baptiste LABRUNE

Tangible Media Group
MIT Media Lab
20 Ames St E14-464C
Cambridge, MA 02139, USA

[Mathew Lippincott]

Yes, I tried 4000m, same problem

On Jun 27, 2010 12:11 PM, "Jean-Baptiste LABRUNE" <lab...@media.mit.edu> wrote:

did you try diskutil partitionDisk disk3 MBRFormat "MS-DOS FAT16" KINGSTON 4000M ?

also see http://www.liquidx.net/blog/2007/05/26/format-partition-as-fat16-on-mac-osx/

&& also limor's thread http://forums.adafruit.com/viewtopic.php?f=31&t=7108

cheers,

Jb

On Jun 27, 2010, at 3:05 PM, Mathew Lippincott wrote:

> I don't have immediate access to a PC or a...

[Jeffrey Warren]

Try this, from (http://chdk.wikia.com/wiki/Bootable_SD_card):

Under MacOS X Leopard, the following series of steps will work:

• Load your SD card in a card reader (unless your camera appears as a disk drive when you connect it)
• Open Disk Utility and highlight the volume. Click "Info" and look for "Disk Identifier". For me, it was /dev/disk2s1
• close the Info window
• With the volume highlighted (not the "drive"), click "Unmount".
• From a Terminal command line, run a command like this:

sudo newfs_msdos -F 16 -v MYSDCARD -b 4096 -c 128 /dev/disk2s1

If you get an error on the Mac command line after running this command like "newfs_msdos: warning: /dev/disk2s1 is not a character device" go ahead and re-mount the drive in the Apple Disk Utility. The drive should still show up as a FAT 16 drive, you can then continue.

[Gabriel Giannini]

Hey Jeffrey,

I am using El Capitan and trying this command on a 4G SD. I do get the error message (is not a character device). After remounting I should reenter the command line again? What if I get the same error again?

I am trying to prepare this card for a graphic calculator and I couldn't find any smaller card for sale. Your message was the most helpful until now.