From: "H. Peter Anvin" <hpa@zytor.com>
To: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Matthew Wilcox <matthew@wil.cx>, Theodore Tso <tytso@mit.edu>,
linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org,
sandeen@redhat.com
Subject: Re: ATA support for 4k sector size
Date: Thu, 26 Feb 2009 13:02:49 -0800 [thread overview]
Message-ID: <49A70379.3050306@zytor.com> (raw)
In-Reply-To: <yq1iqmxey1o.fsf@sermon.lab.mkp.net>
Martin K. Petersen wrote:
>>>>>> "hpa" == H Peter Anvin <hpa@zytor.com> writes:
>
>>> Quick answer from one of my contacts. Desktop drives will indeed
>>> ship with an alignment of 1(*). The alignment is hardwired at time
>>> of manufacture and can't be changed.
>>>
>
> hpa> Oh God.
>
> hpa> This is a disaster.
>
> Rationale being that modern Microsoft operating systems know how to
> interpret the alignment bits. Legacy XP will work without changes
> thanks to the shifted alignment. And Vista+ will do the right thing to
> align partition 1 to what the drive reports.
>
> Also note that Windows only aligns the first partition. That's
> something we need to be aware of when setting up dual boot systems.
>
Yeah, but all of this completely breaks the disk image abstraction,
which is a very powerful paradigm.
-hpa
next prev parent reply other threads:[~2009-02-26 21:04 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-25 22:24 ATA support for 4k sector size Matthew Wilcox
2009-02-25 22:24 ` [PATCH 1/2] ata: Define new commands from ATA8 Matthew Wilcox
2009-02-25 22:24 ` [PATCH 2/2] ata: Add support for Long Logical Sectors and Long Physical Sectors Matthew Wilcox
2009-02-25 22:53 ` ATA support for 4k sector size H. Peter Anvin
2009-02-25 23:27 ` Martin K. Petersen
2009-02-25 23:33 ` H. Peter Anvin
2009-02-25 23:51 ` Martin K. Petersen
2009-02-26 12:43 ` Karel Zak
2009-02-26 15:17 ` H. Peter Anvin
2009-02-25 23:42 ` H. Peter Anvin
2009-02-25 23:55 ` Martin K. Petersen
2009-02-25 23:57 ` H. Peter Anvin
2009-02-26 0:07 ` Martin K. Petersen
2009-02-26 0:10 ` H. Peter Anvin
2009-02-26 0:17 ` Martin K. Petersen
2009-02-25 23:49 ` david
2009-02-26 0:04 ` Martin K. Petersen
2009-02-26 0:13 ` david
2009-02-26 0:20 ` Martin K. Petersen
2009-02-26 2:50 ` Theodore Tso
2009-02-26 3:05 ` Martin K. Petersen
2009-02-26 3:07 ` Matthew Wilcox
2009-02-26 3:23 ` Martin K. Petersen
2009-12-11 7:05 ` James Andrewartha
2009-12-11 7:26 ` H. Peter Anvin
2009-12-11 7:32 ` Martin K. Petersen
2009-02-26 5:16 ` Martin K. Petersen
2009-02-26 12:36 ` Matthew Wilcox
2009-02-26 15:32 ` H. Peter Anvin
2009-02-26 20:35 ` Martin K. Petersen
2009-02-26 21:02 ` H. Peter Anvin [this message]
2009-03-16 14:51 ` Greg Freemyer
2009-03-16 16:27 ` H. Peter Anvin
2009-03-16 17:37 ` Greg Freemyer
2009-03-16 18:11 ` H. Peter Anvin
2009-03-22 1:20 ` Bill Davidsen
2009-03-18 14:33 ` James Bottomley
2009-02-26 18:22 ` hdparm-9.12 released Mark Lord
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