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

[Sasidhar Kasturi <sasidhar.kvs@gmail.com>]

erik quanstrom wrote:
>> 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
>
>
>

Hello Erik,
      Thank you for that.  But, I don't have the source code. Can you
please point me to the place where i can download the source of plan 9.
Also, how to rebuild the code once i get it. If there is any step by
step tutorial sort of thing, please let me know.

Thanking you,
Sasidhar.