linux-kernel - Re: sata errors with Seagate 1.5TB on AMD 780G/SB700 motherboard

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Message-ID: <4908E5B6.1080703@redhat.com>
Date:	Wed, 29 Oct 2008 18:37:42 -0400
From:	Ric Wheeler <rwheeler@...hat.com>
To:	"Phillip O'Donnell" <phillip.odonnell@...il.com>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Oskar Liljeblad <oskar@....mine.nu>,
	Robert Hancock <hancockr@...w.ca>, linux-kernel@...r.kernel.org
Subject: Re: sata errors with Seagate 1.5TB on AMD 780G/SB700 motherboard

Phillip O'Donnell wrote:
> Hi Ric,
>
> Not too sure about that - I run with XFS, which announces that it
> disables the barriers on my devices (I use LVM on top of them) but
> still get the same issue... Unless I've misunderstood your comment?
>
> Cheers,
> Phillip
>   
XFS has a different issue with barriers that has been recently fixed.

I am just going based on what I read at the Seagate customer site - it 
looks like the hang was during the processing of the ATA_CACHE_FLUSH_EXT 
command.

New drives are routinely buggy to some degree, especially ones that jump 
up in capacity :-)  Seagate has a well earned reputation for quality and 
I will be surprised if they don't fix this issue soon,

Ric

>   
>> I suspect that the drive is simply choking on the barrier related cache
>> flushing that we do - that seemed to be the MacOS error as well. The windows
>> comment suggested that windows had an hba/driver bug (most likely unrelated
>> to this).
>>
>> If you want to avoid the issue until they fix the drive, you could run fast
>> and dangerous (mount without barriers on) or slow and safe (disable the
>> write cache).
>>     

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