----- Original Message ----- From: "Lawrance Lee" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, August 28, 2001 9:14 PM Subject: RE: EOS FAT vs FAT32 - any difference?
> > Hi Harman, > > Thanks for the very comprehensive explanation. Yes, now the 16 bit vs the > 32 bit > is clear to me. And it's explained a number of PC related questions that I > had in my > head but never got clarification. > > I have been reliabily told that the EOS 10D supports FAT32, so I'm keen to > format > my 4GB microdrive CF II card (it's one of those Hitachi 4GB units that you > find easily > on eBay) to 64KB cluster size. > > But no matter how hard I try, I can't format it for 64K. > > I get an error message saying that this block size is too big. > > The command that I use from a command.com window within Windows 2000 is: > format (drive letter): /fs:FAT32 /v:EOS_DIGITAL /a:64K > > It starts the format, but when it gets to 99%, it coughs up that error. > > Very frustrating...... !!!! > > Can anyone help? > > Thanks in advance, > > Lawrance > > ----Original Message Follows---- > From: Harman Bajwa <[EMAIL PROTECTED]> > Subject: Re: EOS FAT vs FAT32 - any difference? > Basically, > FAT (16 bit addressing): It is the older brother of > FAT32 wherein the file is *always* stored in multiples > of 32KBytes (yes even if the file is 1byte in size it > will occupy a minimum of 32KBytes). The maximum number > of such "storage units" (or in technical jargon - > clusters) is limited to 65536 such clusters (because > of the fact that only 16 bits can be used to address > any single cluster). Hence the maximum disk size that > will be usable in this case is 32K x 64K = 2GB. Beyond > that the disk will need to be partitioned (or others > means to extend the capacity with larger cluster sizes > etc.) > > FAT32 (32 bit addressing): Designed mainly to overcome > the limitatiosn posed by the 16 bit addressable FAT > system, it enables upto 4 TBytes of storage and > cluster sizes as small as 4KBytes and support for long > file names and some other improvements. > > If your card is not above 2GB, you do not need to > format it in FAT32 just to be able to use it. OTOH, > even a 1GB can be formatted in FAT32 with the > advantage that at most < 4KBytes of storage will be > wasted in storing any potential file (vs < 32KB in > FAT). However, the device which is going use such a > formnatted drive must be able to read and use a card > formatted in FAT32. > > - - Harman Lawrance, I can't answer your question but the general consensus of opinion is that the 4GB MD works best when formatted in 32KB clusters. http://www.robgalbraith.com/bins/content_page.asp?cid=7-6453-6837 HTH CraigZ -- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.637 / Virus Database: 408 - Release Date: 20/03/2004 * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
