From: Mark Lord <liml@rtr.ca>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: IDE/ATA development list <linux-ide@vger.kernel.org>
Subject: Re: What's with libata and DVDs ?
Date: Sun, 07 Dec 2008 11:13:13 -0500 [thread overview]
Message-ID: <493BF619.7000003@rtr.ca> (raw)
In-Reply-To: <20081207112032.25089ac9@lxorguk.ukuu.org.uk>
Alan Cox wrote:
> On Sat, 06 Dec 2008 23:47:09 -0500
> Mark Lord <liml@rtr.ca> wrote:
>
>> Attempting to play a known-good DVD-video in MythTV-0.21
>> using libata in kernel 2.6.27.7 :
>>
>> sr 4:0:0:0: [sr0] unaligned transfer
>
> Your system somehow generated a scsi request which was not 2K aligned.
> The scsi mid layer then reported that and added padding - which
> presumably didn't help because the command shouldn't have been misaligned
> in the first place.
>
> If you strace it do you see any misaligned requests coming from user
> space - also btw is the cd layer reporting the sector size wrong
> anywhere ?
..
No complaints from the cd layer -- just that unaligned message.
I've changed that message to actually *show* the values it is complaining
about (what a concept, duh..), so next time I reproduce it there will be
some information as to what was really going on.
Probably just a buggy app, or maybe 64-bit porting error in it.
Cheers
prev parent reply other threads:[~2008-12-07 16:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-07 4:47 What's with libata and DVDs ? Mark Lord
2008-12-07 5:01 ` Mark Lord
2008-12-07 11:20 ` Alan Cox
2008-12-07 16:13 ` Mark Lord [this message]
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