From: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
To: Jens Axboe <axboe@suse.de>, mattia <mattia@nixlab.net>
Subject: Re: DriveReady SeekComplete Error
Date: Fri, 4 Jun 2004 13:44:30 +0200
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Cc: linux-kernel@vger.kernel.org, Andrew Morton <akpm@osdl.org>
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On Friday 04 of June 2004 12:22, Jens Axboe wrote:
> damnit, don't trim the cc list!
>
> On Fri, Jun 04 2004, mattia wrote:
> > I have the following error (kernel 2.6.6):
> >
> > Jun  4 08:05:43 blink kernel: ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> > Jun  4 08:05:43 blink kernel: hdc: Maxtor 6Y160P0, ATA DISK drive
> > Jun  4 08:05:43 blink kernel: hdd: Maxtor 6Y120L0, ATA DISK drive
> > Jun  4 08:05:43 blink kernel: ide1 at 0x170-0x177,0x376 on irq 15
> > Jun  4 08:05:43 blink kernel: hda: max request size: 128KiB
> > Jun  4 08:05:43 blink kernel: hda: 78177792 sectors (40027 MB) w/1819KiB
> > Cache, CHS=65535/16/63, UDMA(100)
> > Jun  4 08:05:43 blink kernel:  hda: hda1 hda2 hda3
> > Jun  4 08:05:43 blink kernel: hdc: max request size: 1024KiB
> > Jun  4 08:05:43 blink kernel: hdc: 320173056 sectors (163928 MB)
> > w/7936KiB Cache, CHS=19929/255/63, UDMA(100)
> > Jun  4 08:05:43 blink kernel:  hdc: hdc1
> > Jun  4 08:05:43 blink kernel: hdd: max request size: 128KiB
> > Jun  4 08:05:43 blink kernel: hdd: 240121728 sectors (122942 MB)
> > w/2048KiB Cache, CHS=65535/16/63, UDMA(100)
> > Jun  4 08:05:43 blink kernel:  hdd: hdd1 hdd2 hdd3
> > Jun  4 08:05:43 blink kernel: hdd: task_no_data_intr: status=0x51 {
> > DriveReady SeekComplete Error }
> > Jun  4 08:05:43 blink kernel: hdd: task_no_data_intr: error=0x04 {
> > DriveStatusError }
> > Jun  4 08:05:43 blink kernel: hdd: Write Cache FAILED Flushing!
> >
> >
> > I found somewhere that's something wrong with that maxtor drive.
> > However, everything works fine.
>
> There's nothing wrong with the drive technically, it's just odd (lba48
> without FLUSH_CACHE_EXT). It's really a linux ide bug that's fixed in
> newer kernels. 2.6.7 will fix your problem.

Wrong.

Bug is a combination of a very minor firmware quirk
and lack of strict checking in Linux IDE driver.

FLUSH_CACHE_EXT bit is set but it is not supported
(but it is not a problem because LBA48 is not supported also).

It is fixed in 2.6.7-rc1 but your IDE barrier patch has this problem
(just reminding you that it is still not fixed in 2.6.7-rc2-mm2).

Cheers,
Bartlomiej

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