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

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

> 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.


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

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
Freedos-user mailing list

Reply via email to