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From: jmp@mult.UUCP (Jean.Marc Pigeon)
Newsgroups: comp.os.minix
Subject: HARD-DISK TROUBLE (SOLUTIONS )
Message-ID: <264@mult.UUCP>
Date: Wed, 11-Nov-87 12:42:05 EST
Article-I.D.: mult.264
Posted: Wed Nov 11 12:42:05 1987
Date-Received: Tue, 17-Nov-87 05:55:16 EST
Organization: Groupe SOBECO (Montreal Canada)
Lines: 60
Keywords: MINIX, HARD-DISK, TROUBLE, SOLUTION

Bonjour a tous  ("hello netland"  :-})

	As my system was "sick", I lost all answers I get
	about my first request on AT driver trouble. Thanks
	to those who answer.

	In the midtime I work on the driver problems and I
	spot 3 bugs.

	first problem:
	- After a short while (in writing acces), the hard disk
	  hang, and just a reboot could recover it.

	- I found that in "w_transfer" , the test 
	  to see if the controler is ready to accept data, used
	  a local variable with no initiale value (so sometime...).
	  The correct line (229) is
	  for (i=0,r=0;i<MAX_WIN_RETRY && (r&8)==0;i++)
		        port_in(WIN_REG8,&r);
	  At this point the driver was able to reset in case of
	  error:

	Second problem:
	- Each time I try to acces sector 11 on head 4 (whatever the
	  cylinder number), the controler report "ERROR".

	- In "w_init" the command[6] parameter is set to a wrong value
	  (alway 1).
	  The correct line (297 / 313 ) is:
	  command[6] = wini[0].wn_heads | 0xa0;
	  (same correction for disk 1)
	  At this point I was able to acces all the partition without
	  bad spots.

	Third problem:
	- If the "h" command is not use before "=" then the hard-disk
	  stay 'invisible'.

	- "init_params" is not reseting the controler prior to
	  set the parameters.
	  the correct line (443) is:
	  if ((nr_drives >0 ) && (w_reset() != OK ) nr_drives = 0;

	  At this point: It seems working perfectly, except the hard-disk
	  fsck report error on the file structure, I wonder why? 

	So that's all for now. I hope that will be helpfull to somebody.


JMP


NB: 	All the line number I gave;  stand for at_wini 1.1, I don't know if
	the problems are the same in the XT driver.

PS:	If somebody could tell me where I can find the 1.2 diff, I'll
	be glad.