From: turnkit@gmail.com   
      
   Is the drive known good?   
      
   You might try a low-level format on a PC just to test it.   
      
   Also, I've no experience w/ the Model II, but a 20MB drive seems rather large   
   (-!).  If you have a five you might try it.  8)   
      
   On Wednesday, January 16, 2013 6:41:55 PM UTC-6, ball.o...@gmail.com wrote:   
   > I found a Type 4 hard disk controller separate from my Model II last year   
   and I never really knew how to use it until I got a copy of TRS-xenix 1.03   
   (and the two piece M68K board). I keep a small stockpile of known good ST-412   
   interface hard drives and    
   I attached one of my 20mb ST-225's to the system as according to reports it   
   was compatible with this controller. The problem I am running into is that   
   formatting under DISKUTIL cannot be done as it constantly insists that the   
   whole disk is bad.   
   >    
   > Again, I can rule out a bad drive and through testing I also ruled out the   
   cabling. What I can't rule out if something is wrong on either the controller   
   or with the version of Xenix I am using. I also noticed that with the   
   controller attached to the    
   drive the BUSY light stays on, unless you set the drive ID to anyhting but 0.   
   At which point the BUSY light stays off until you tell DISKUTIL that the drive   
   is on another channel, at which point it comes on and you can't put it out   
   unless you reset the    
   computer.   
   >    
   > The controller has two jumper blocks. I've touched neither because I ahve no   
   clue what they do and I can't find any documentation for the controller.   
   >    
   > I'm having a lot of trouble finding people online who know much about the   
   Model II's. I'm wondering is anyone here knows anything about these   
   controllers.   
   >    
   >    
   >    
   > Related Photographs:   
   >    
   >    
   >    
   > Drive controller   
   >    
   > http://i11.photobucket.com/albums/a166/ballsandy/Computer%20re   
   ated/CRW_7791.jpg   
   >    
   >    
   >    
   > ST-225   
   >    
   > http://i11.photobucket.com/albums/a166/ballsandy/Computer%20re   
   ated/100_2769.jpg   
   >    
   >    
   >    
   > Diskutil (error map was not present on drive)   
   >    
   > http://i11.photobucket.com/albums/a166/ballsandy/Computer%20re   
   ated/CRW_7789.jpg   
   >    
   >    
   >    
   > Format error   
   >    
   > http://i11.photobucket.com/albums/a166/ballsandy/Computer%20re   
   ated/CRW_7790.jpg   
      
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