Tranferings 1 bit at a time is always slower than 8 bits at a time. if the clock stays the same for both. How SATA beats this is something I don't understand. SATA doesn't have seperate handshaking outputs so handshkes have to travel the same serial lines. Quit a feat of engineering there. When I try to format very large SD chips with DOS; the software just gives up. Small sd chips do format but slowly. Large CF chips format in a few seconds.
cheers DS.. On Tue, 2 Dec 2014 11:02:56 -0500 dmccunney <dennis.mccun...@gmail.com> writes: > On Tue, Dec 2, 2014 at 9:33 AM, Dale E Sterner <sunbeam...@juno.com> > wrote: > > FAT16 is limited to 8 gigs but FAT32 goes much higher. I kinda > remember > > Wikopedia saying 2T but could easily be wrong. > > FAT16 is limited to a 2GB volume size. FAT32 goes up to 8TB. > > In FAT*, the basic unit of space it the cluster, and there will be a > limit on the number of clusters. Each cluster must have a unique > address. > > FAT16 uses a 16 bit cluster address, so there are 65,536 possible > clusters. The maximum size a cluster can be is 32KB. 65,536 x 32KB > = > 2,097,152 bytes > > FAT32 uses a 32 bit cluster address, so there are 268,435,445 > possible clusters. Again, the maximum size a cluster can be is > 32KB. > 268,435,445 x 32KB = 8,589,934,240 bytes > > If you are trying to format the drive as FAT32 from within Windows, > there may be limitations on volume size imposed by the MS format > utility. > > > DOS might have problems with SATA drive. DOS reads from the > harddrive a > > lot. Since SATA is serial (just one bit at a time) The data > ransfer rate might > > be too > slow for DOS to live with. > > You really need to update your knowledge. > > While it seems counter-intuitive, current SATA drives are much > *faster* than IDE drives, with higher data transfer rates. > *Getting* > that throughput was a major reason behind the shift to SATA. > > > I know I can't get it to run on a SD card because one bit at a > time is just too > > slow. You won't know until you try it. > > SATA != SD. > > There is no reason inherent to the card why SD should be slower than > CF. In fact, the reverse is generally true. > > Variables will include native card speed (some SD cards are faster > than others), the adapter you are using, and the host hardware and > OS. > I've run stuff from SD cards here just fine. > > > cheers > > DS > ______ > Dennis > https://plus.google.com/u/0/105128793974319004519 > > ------------------------------------------------------------------------- ----- > Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server > from Actuate! Instantly Supercharge Your Business Reports and > Dashboards > with Interactivity, Sharing, Native Excel Exports, App Integration & > more > Get technology previously reserved for billion-dollar corporations, > FREE > http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clk trk > _______________________________________________ > Freedos-user mailing list > Freedos-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freedos-user > ____________________________________________________________ > Buffett's Top 5 Stocks > Go here to get Buffett's Top 5 Stocks, plus his 16 latest buys, > FREE > http://thirdpartyoffers.juno.com/TGL3165/547e5da58ec6f5da53787mp06duc > ******************************************************>>>> >From Dale Sterner - MS organic chemistry http://pubs.acs.org/doi/abs/10.1021/jo00975a052 *******************************************************>>>> ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
