[Coco] Full height 5.25" drives

[RJRTTY at aol.com]

In a message dated 7/7/05 12:13:06 AM Eastern Daylight Time, Rswoger at aol.com 
writes:

<<  
 By the way, a Florida outfit used to sell CoCo owners two full height TEAC  
 drives mounted by DEC horizontally side by side in a CoCo 2 colored sturdy 
 metal  case with power supply and a "D" connector. They were absolutely 
quiet 
 because  of a special non rubber belt drive and a 30 ms step rate that 
matched the 
 rate  of the original CoCo drive interfaces. I DEMOed them at a Glenside 
 meeting. I  have at least a half a dozen of them. Not ready to part with 
them. 
 They are a  treat to use.
  
 The noise some folks refer to was brought about by drives with faster step  
 rates were never accommodated by CoCo Drive controllers -- the faster step 
rate 
  drives, some able to step at a 6 ms rate, would chatter at CoCo's 30 ms  
 step rate signal. (Sometimes older is better.) >>


       I have a Digital dual drive unit like that.    They only do 30ms as 
well.
When I first tried HDB-DOS purchased from Cloud-9 I had
problems  with the installation that looked like a software bug.
I eventually discovered the problem was the default 6 ms step rate
the software was trying to use.   Too fast for the Digital drives.

Roy