Swapping Hi density drives for low density drives

[Fred Cisin]

On Sun, 3 Jul 2005, Michael B. Brutman wrote:
> Does anybody have experience with doing something like this?  I thought
> that the 1.44MB drives had a media sensor that would slow down the
> recording rate when using double density media.  There should have been
> no problem coping/formatting double density media.  And yet, here I am ...

The media sensor does NOT control the data transfer rate.
It only controls the write current level.
For READing and WRITEing, the BIOS will try both rates to "find" what
works.  When FORMATing, the software selects the rate, based on what YOU
specify.

When you formatted on the other machines, did you do
/F:2 or /F:720 or /T:80/N:9  ?
If not, then you probably ended up with 1.4M, which the JR cannot read.


BTW, FORMAT, particularly the ones in 3.20 and 3.30 will often fail and
falsely report media problems if the transfer buffer happens to straddle a
64K boundary.  Adding or removing TSRs will move it.

--
Grumpy Ol' Fred     		cisin at xenosoft.com