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Date: Sun, 9 Jul 2006 16:46:20 -0400 (EDT)
From: Justin Piszcz <jpiszcz@lucidpixels.com>
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To: Mark Lord <liml@rtr.ca>
cc: Jeff Garzik <jgarzik@pobox.com>, Sander <sander@humilis.net>,
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       IDE/ATA development list <linux-ide@vger.kernel.org>,
       Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: LibPATA code issues / 2.6.15.4 (found the opcode=0x35)!
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On Sun, 9 Jul 2006, Justin Piszcz wrote:

> I made my own patch (following Mark's example) but also added that printk in 
> that function.
>
> Jul  9 16:37:52 p34 kernel: [4294810.556000] ata_gen_fixed_sense: failed 
> ata_op=0x35
> Jul  9 16:37:52 p34 kernel: [4294810.556000] ata4: translated ATA stat/err 
> 0x51/04 to SCSI SK/ASC/ASCQ 0xb/00/00
> Jul  9 16:37:52 p34 kernel: [4294810.556000] ata_gen_ata_desc_sense: failed 
> ata_op=0x51
> Jul  9 16:37:52 p34 kernel: [4294810.556000] ata4: status=0x51 { DriveReady 
> SeekComplete Error }
> Jul  9 16:37:52 p34 kernel: [4294810.556000] ata4: error=0x04 { 
> DriveStatusError }
>
> Now that we have found the ata_op code of 0x35, what does this mean?  Is it 
> generated from a bad FUA/unsupported command from the kernel/SATA driver?
>
> Justin.
>
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In /usr/src/linux/include/linux/ata.h:

   ATA_CMD_WRITE_EXT = 0x35,

Perhaps these drives do not support this command or do not support it 
properly?

Any idea, Jeff/Alan?

Justin.