Thanks Brent, that wiped the mmc clean with all zeros. I was then able to reformat it using W2K. The size of the FAT decreased from 16 to 12 sectors, number of sectors per track and number of heads are also different than what the card came with. Anyone know if this is important? Regards, Gordon Williams ----- Original Message ----- From: "Brent Brown" To: Sent: Tuesday, November 25, 2003 10:14 PM Subject: Re: [PIC] PIC connected to Multimedia Card > On 25 Nov 2003 at 22:02, Gordon Williams wrote: > > > I'm working on project where I can write files out to a mmc. The one > > that I'm using is 16Meg and I have been trying to work out the FAT > > that I will be using. I have now screwed up the data in Sector 0 > > (boot sector) and can't read or write to it using the card reader that > > I have on my PC (W2K). The PC cant tell what size the mmc is and > > won't format it. > > > > Any smart cookies out there that can explain how to make this writable > > again? I've googled my head off and I'm not any further ahead. > > > > http://www.datarescue.com/photorescue/download.htm > > Try Card Wiper from adress above. It didn't fix my 128MB SmartMedia card > that the PC can read/write but my Fuji camera still rejects but that's another > story... > > -- > Brent Brown, Electronic Design Solutions > 16 English Street, Hamilton, New Zealand > Ph/fax: +64 7 849 0069 > Mobile/txt: 025 334 069 > eMail: brent.brown@clear.net.nz > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.