[9fans] fossil:diskWriteRawFailed error with Plan 9 on Microsoft Virtual PC

[9fans] fossil:diskWriteRawFailed error with Plan 9 on Microsoft Virtual PC

[Sasidhar Kasturi]

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Hello,
       I tried to install plan 9 on virtual pc and succedded. But, once
i boot through plan 9  errors are coming.
Attached the screen shot of the error.


Sasidhar.

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Re: [9fans] fossil:diskWriteRawFailed error with Plan 9 on Microsoft

[erik quanstrom]

> Hello,
>        I tried to install plan 9 on virtual pc and succedded. But, once
> i boot through plan 9  errors are coming.
> Attached the screen shot of the error.

the plan 9 ide driver apparently disagrees with virtual pc.
this isn't a fossil or venti problem.

unfortunately, i have no access to virtual pc so the rest of this
email is a thought experiment ....

command 30
data f09534b0 limit f0964eb0 dlen 8192 status 0 error 0
lba 210592 -> 210592, count 16 -> 16 (16)
 0x00 0x04 0xac 0x36 0x03 0xe0 0x58
0x40: e306 0x42: c0000 x48: 00
0x4a 0000

so
	the command is write sectors (Cws; 0x30)
	lba 0x0336a0 (according to the driver)

the registers say:

0	1	2	3	4	5	6	As
	0x00	0x04	0xac	0x36	0x03	0xe0	0x58
	error	count	lba0	lba1	lba2	stat

at lba 0x3036ac (4 sectors to go) status Bsy|Df|Drdy.

i would think you're issuing a command before the device
is ready for you.  this patch may help.

minooka; diff -c /sys/src/9/pc/sdata.c  /n/dump/2008/0908/sys/src/9/pc/sdata.c
/sys/src/9/pc/sdata.c:1418,1424 - /n/dump/2008/0908/sys/src/9/pc/sdata.c:1418,1424
  	ctlr = drive->ctlr;
  	cmdport = ctlr->cmdport;
  	ctlport = ctlr->ctlport;
- 	if(ataready(cmdport, ctlport, drive->dev, Bsy|Drq, Drdy, 101*1000) < 0)
+ 	if(ataready(cmdport, ctlport, drive->dev, Bsy|Drq, 0, 101*1000) < 0)
  		return -1;

  	ilock(ctlr);

- erik