Re: Silicon Image 3112A SATA trouble

From: Yaroslav Klyukin <skintwin@mail.ru>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: Jens Axboe <axboe@suse.de>, Vojtech Pavlik <vojtech@suse.cz>,
	Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>,
	"Prakash K. Cheemplavam" <prakashkc@gmx.de>,
	marcush@onlinehome.de, linux-kernel@vger.kernel.org,
	eric_mudama@Maxtor.com
Subject: Re: Silicon Image 3112A SATA trouble
Date: Sun, 30 Nov 2003 16:05:14 -0500	[thread overview]
Message-ID: <3FCA5B8A.2020006@mail.ru> (raw)
In-Reply-To: <3FCA3787.1000104@pobox.com>

Jeff Garzik wrote:
> Jens Axboe wrote:
> 
>> Ah, my line wasn't completely clear (to say the least)... So to clear
>> all doubts:
>>
>>     if ((sector_count % 15 == 1) && (sector_count != 1))
>>         errata path
>>
>> Agree?
> 
> 
> 
> Agreed.
> 
> 
> The confusion here is most likely my fault, as my original post 
> intentionally inverted the logic for illustrative purposes (hah!)...
> 
>> Well, the constraint we must satisfy is
>>
>>     sector_count % 15 != 1
>>
>> (i.e. "== 1" causes the lockup) 

Hi, I just rebuilt my kernel with libata support.
I have 3112 Silicon Image controller with IDE drive attahed.
(I have 2 IDE drives, so I bought second controller to split load between them. One is connected to the MB IDE controller.)

When I run hdparm command, I can see strange behaviour of the ilbata driver:

[root@shrike root]# hdparm -t /dev/hda

/dev/hda:
  Timing buffered disk reads:  64 MB in  1.19 seconds = 53.78 MB/sec
[root@shrike root]# hdparm -t /dev/sda1

/dev/sda1:
  Timing buffered disk reads:  read(1048576) returned 921600 bytes
[root@shrike root]#

Meanwhile -T switch works normally.

I know, that siimage support is broken, any ideas, what can possibly cause such errors?
Is it somehow linked to the error discussed in this message thread?

WBR.