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From: Alan <alan@lxorguk.ukuu.org.uk>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
	"Moore, Eric" <Eric.Moore@lsi.com>,
	ric@emc.com, Theodore Tso <tytso@mit.edu>,
	Neil Brown <neilb@suse.de>, "H. Peter Anvin" <hpa@zytor.com>,
	Linux-ide <linux-ide@vger.kernel.org>,
	linux-scsi <linux-scsi@vger.kernel.org>,
	linux-raid@vger.kernel.org, Tejun Heo <htejun@gmail.com>,
	James Bottomley <James.Bottomley@SteelEye.com>,
	Mark Lord <mlord@pobox.com>, Jens Axboe <jens.axboe@oracle.com>,
	"Clark, Nathan" <Clark_Nathan@emc.com>,
	"Singh, Arvinder" <Singh_Arvinder@emc.com>,
	"De Smet, Jochen" <DeSmet_Jochen@emc.com>,
	"Farmer, Matt" <Farmer_Matt@emc.com>,
	linux-fsdevel@vger.kernel.org, "Mizar,
	Sunita" <Mizar_Sunita@emc.com>
Subject: Re: end to end error recovery musings
Date: Tue, 27 Feb 2007 23:39:46 +0000	[thread overview]
Message-ID: <20070227233946.7ad33a50@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <yq1r6sb7733.fsf@sermon.lab.mkp.net>

> Not sure you're up-to-date on the T10 data integrity feature.
> Essentially it's an extension of the 520 byte sectors common in disk

I saw the basics but not the detail. Thanks for the explanation it was
most helpful and promises to fix a few things for some controllers.. but
here's a minor bit of passing bad news - quite a few older ATA controllers
can't issue DMA transfers that are not a multiple of 512 bytes without
crapping themselves (eg READ_LONG). Guess we may need to add
ap->i_do_not_suck or similar 8)

On the bright side I believe the Intel ICH is the only one with this
problem (and a workaround) which is SATA capable 8)

Alan

WARNING: multiple messages have this Message-ID (diff)
From: Alan <alan@lxorguk.ukuu.org.uk>
To: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
	"Moore, Eric" <Eric.Moore@lsi.com>, <ric@emc.com>,
	"Theodore Tso" <tytso@mit.edu>, "Neil Brown" <neilb@suse.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	"Linux-ide" <linux-ide@vger.kernel.org>,
	"linux-scsi" <linux-scsi@vger.kernel.org>,
	<linux-raid@vger.kernel.org>, "Tejun Heo" <htejun@gmail.com>,
	"James Bottomley" <James.Bottomley@SteelEye.com>,
	"Mark Lord" <mlord@pobox.com>,
	"Jens Axboe" <jens.axboe@oracle.com>,
	"Clark, Nathan" <Clark_Nathan@emc.com>,
	"Singh, Arvinder" <Singh_Arvinder@emc.com>,
	"De Smet, Jochen" <DeSmet_Jochen@emc.com>,
	"Farmer, Matt" <Farmer_Matt@emc.com>,
	<linux-fsdevel@vger.kernel.org>,
	"Mizar, Sunita" <Mizar_Sunita@emc.com>
Subject: Re: end to end error recovery musings
Date: Tue, 27 Feb 2007 23:39:46 +0000	[thread overview]
Message-ID: <20070227233946.7ad33a50@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <yq1r6sb7733.fsf@sermon.lab.mkp.net>

> Not sure you're up-to-date on the T10 data integrity feature.
> Essentially it's an extension of the 520 byte sectors common in disk

I saw the basics but not the detail. Thanks for the explanation it was
most helpful and promises to fix a few things for some controllers.. but
here's a minor bit of passing bad news - quite a few older ATA controllers
can't issue DMA transfers that are not a multiple of 512 bytes without
crapping themselves (eg READ_LONG). Guess we may need to add
ap->i_do_not_suck or similar 8)

On the bright side I believe the Intel ICH is the only one with this
problem (and a workaround) which is SATA capable 8)

Alan

  reply	other threads:[~2007-02-27 23:39 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-27  1:10 end to end error recovery musings Moore, Eric
2007-02-27  1:10 ` Moore, Eric
2007-02-27 16:50 ` Martin K. Petersen
2007-02-27 16:50   ` Martin K. Petersen
2007-02-27 18:51   ` Ric Wheeler
2007-02-27 19:02   ` Alan
2007-02-27 19:02     ` Alan
2007-02-27 18:39     ` Andreas Dilger
2007-02-27 19:07     ` Martin K. Petersen
2007-02-27 19:07       ` Martin K. Petersen
2007-02-27 23:39       ` Alan [this message]
2007-02-27 23:39         ` Alan
2007-02-27 22:51         ` Martin K. Petersen
2007-02-27 22:51           ` Martin K. Petersen
2007-02-28 13:46           ` Douglas Gilbert
2007-02-28 17:16             ` Martin K. Petersen
2007-02-28 17:30               ` James Bottomley
2007-02-28 17:42                 ` Martin K. Petersen
2007-02-28 17:52                   ` James Bottomley
2007-03-01  1:28                     ` H. Peter Anvin
2007-03-01 14:25                       ` James Bottomley
2007-03-01 17:19                         ` H. Peter Anvin
2007-02-28 15:19       ` Moore, Eric
2007-02-28 15:19         ` Moore, Eric
2007-02-28 17:27         ` Martin K. Petersen
  -- strict thread matches above, loose matches on Subject: below --
2007-02-23 14:15 Ric Wheeler
2007-02-23 14:15 ` Ric Wheeler
2007-02-24  0:03 ` H. Peter Anvin
2007-02-24  0:37   ` Andreas Dilger
2007-02-24  2:05     ` H. Peter Anvin
2007-02-24  2:32     ` Theodore Tso
2007-02-24 18:39       ` Chris Wedgwood
2007-02-26  5:33       ` Neil Brown
2007-02-26 13:25         ` Theodore Tso
2007-02-26 15:15           ` Alan
2007-02-26 15:18             ` Ric Wheeler
2007-02-26 17:01               ` Alan
2007-02-26 16:42                 ` Ric Wheeler
2007-02-26 15:17           ` James Bottomley
2007-02-26 18:59           ` H. Peter Anvin
2007-02-26 22:46           ` Jeff Garzik
2007-02-26 22:53             ` Ric Wheeler
2007-02-27  1:19               ` Alan
2007-02-26  6:01   ` Douglas Gilbert

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